Patent Publication Number: US-2022235604-A1

Title: Door assembly

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     This application claims priority to United Kingdom Application No. 2101067.3 filed Jan. 27, 2021, the entire contents of which are herein incorporated by reference. 
     The present invention relates to a door assembly, for an opening in a building, comprising a sealing assembly, wherein the sealing assembly is configured to seal a gap between a rolling shutter door, the opening, and a surface of the building proximal the opening. The present invention further relates to a sealing assembly for a door assembly, in particular an acoustic sealing assembly. 
     BACKGROUND 
     Door assemblies comprising a rolling shutter door are used in a variety of buildings, for example, in domestic, industrial, commercial, and public buildings. Door assemblies comprising a rolling shutter door may be particularly useful as fire doors, security doors or as insulating doors. 
     Rolling shutter doors are typically flexible. This allows the rolling shutter door to be retracted from a closed position in which the rolling shutter door occludes the opening in the building (i.e. closes it off completely), to an open position in which the opening is at least partially clear of occlusion by the rolling shutter door (i.e. the opening is at least partially open). To move the rolling shutter door from a closed to an open position, the rolling shutter door is typically rolled about a barrel positioned above, or to one side of, the opening in the building. Conversely, the rolling shutter door may be unrolled from the barrel to move the rolling shutter door from an open position to a closed position. 
     The size of the coil of rolling shutter door about the barrel changes depending on whether the rolling shutter door is rolled around the barrel or unrolled from the barrel. As the rolling shutter door is unrolled from the barrel, the diameter of the rolled door about the barrel decreases. In other terms, the distance between the barrel and the outermost surface of the rolling shutter door rolled around the barrel decreases as the rolling shutter door is unrolled from the barrel. To accommodate the changing size of the roll of rolling shutter about the barrel between the open and closed positions, a gap is provided between the rolling shutter door, the opening, and the surface of the building proximal the opening. Sound, smoke, heat and the like may undesirably leak through this gap when the rolling shutter door is in a closed position. 
       FIG. 1  illustrates such a prior art door assembly  2 , which is described by way of example. The person skilled in the art will appreciate that the sealing assembly according to the present invention equally may be used with alternative door assemblies. 
     With reference to  FIG. 1 , the door assembly  2 , and more particularly a rolling shutter door  4 , is positioned to occlude an opening in a building (building not illustrated). The opening may be defined by, for example, an upper wall and two side walls, and may be of any suitable dimensions. 
     The rolling shutter door  4  is provided in a fully closed position wherein the opening is occluded. The rolling shutter door  4  comprises a plurality of interlocking laths  6 , which provides flexibility to the rolling shutter door  4 . 
     The rolling shutter door  4  is attached to a barrel  20 , which can be rotated about its longitudinal axis clockwise or anti-clockwise depending on the configuration of the door assembly. The barrel  20  can be rotated to coil the rolling shutter door  4  about itself, thus moving the rolling shutter door  4  from a closed position to an open position. Mechanical means, such as a motor  30 , is provided to assist in rotating the barrel, although the barrel may additionally or alternatively be rotated manually (e.g. by means of a pulley system or a crankshaft). In its open position, the portion of the rolling shutter door rolled about the barrel  20  has an arcuate configuration, in the manner of a spiral or coil. In its closed position, the portion of the rolling shutter door  4  at least partially occluding the opening  14  has a substantially planar configuration. 
     The rolling shutter door  4  is provided with a bottom rail  10 . The bottom rail  10  reinforces the rolling shutter door  4  to provide additional strength. As such, the bottom rail  10  may be made of a reinforced material such as, but not limited to, steel. The bottom rail  10  also comprises a blocking member  12  to protect the bottom rail  10  from damage. The blocking member  12  may be provided in the form of a protruding bar as illustrated in  FIG. 1 . 
     The rolling door  4  is further provided with protection straps  34  to protect the rolling shutter door when moving between the closed and an open position, as illustrated in  FIG. 1 . In particular, one or more protection straps  34  may be provided to protect the rolling shutter door  4  when it is coiled around the barrel  20  when the door is in an open position. The protection straps  34  are generally provided on a surface of the rolling shutter door  4 , which faces the interior of the building. The protection straps  34  are generally made of an elastic material to provide cushioning to the rolling shutter door  4  in the open position (when coiled around the barrel  20 ). As the rolling shutter door  4  is unrolled from barrel  20  as the door is moved into the closed position, the protection straps  34  cushion the rolling shutter door  4 . Moreover, the protection straps  34  may provide additional structural integrity to the rolling shutter door  4  when in the closed position. The protection straps may also reduce noise when the rolling shutter door is moved between open and closed positions. 
     The barrel  20  is supported by a pair of support brackets  22 . The support brackets are provided with one or more apertures  24 , for inserting fixtures and fittings (e.g. screws, nail, bolts, and the like), to secure the support brackets  22  to the building in which the opening is defined (e.g. to the top wall defining the opening in the building). A lintel portion  18  of the door assembly  2  collectively comprises the barrel  20  and the support brackets  22 . The lintel portion  18  is positioned above the opening. The barrel  20  is positioned horizontally with respect to the ground G. The rolling shutter door  4  is therefore configured to open vertically in the direction of arrow A with respect to the ground G upon rotation of the barrel  20 . 
     Although the illustrated embodiments depict the barrel  20  being horizontally positioned with respect to the ground G, such that the rolling shutter door  4  opens vertically, those skilled in the art will appreciate that the barrel  20  could equally be positioned vertically with respect to the ground G to provide a rolling shutter door  4  that opens horizontally. Therefore, in embodiments of the present invention described herein, the rolling shutter door  4  may move between the open position and the closed position in a horizontal manner. 
     The rolling shutter door assembly  2  comprises a pair of guide members  16  configured to guide the rolling shutter door  4  between an open position and the closed position. The guide members  16  may be substantially parallel with respect to one another, and provide a track in which the rolling shutter door  4  is secured as it moves between the open position and the closed position. The guide members  16  are provided with one or more apertures  32  which are suitable for inserting fixtures and fittings, to secure the guide members  16  to a surface of the building (e.g. to the side walls defining the opening in the building). 
       FIG. 2  illustrates the door assembly of  FIG. 1  in its fully open position to reveal opening  14 . The opening allows passage between one side S 1  of the door assembly, to another side S 2  of the door assembly. S 1  may be the interior of a building, and S 2  may be the exterior of a building.  FIG. 3  illustrates the door assembly of  FIGS. 1 and 2  wherein the rolling shutter door  4  partially occludes the opening  14 . As such, the rolling shutter door  4  is only partially coiled about the barrel  20 . In the closed position as illustrated in  FIG. 1 , the rolling shutter door  4  occludes the opening. The opening may be of any suitable height H or width W. 
       FIGS. 4 and 5  illustrate end views of the lintel portion  18  comprising the barrel  20 . As shown in  FIG. 4 , a housing  18   a  may be provided (not illustrated in  FIGS. 1-3 ) about the barrel  20  and support brackets  22 . The housing  18   a  protects the barrel  20  and the rolling shutter door  4 , when the rolling shutter door  4  is in its open position. The housing  18   a  may also be provided to screen the barrel  20  and support brackets  22  (e.g. for aesthetic purposes). 
     A portion of the rolling shutter door  4  comprising a plurality of laths  6  is illustrated in  FIGS. 4 and 5 . The plurality of laths  6  are configured such that the rolling shutter door  4  is flexible. The plurality of laths  6  may each comprise one or more interlocking members  8  (e.g. via a snap-fit arrangement) configured to allow connection of a lath  6  to an adjacent lath. The plurality of laths may be connected by any suitable means known to those skilled in the art. The interlocking members  8  are configured to allow a lath  6  to be connected to an adjacent lath  6  such that each lath  6  is pivotable with respect to one another, thus providing a flexible rolling shutter door  4 . The rolling shutter door  4  may comprise a plurality of adjacent laths  6  comprising interconnecting members  8 . 
     Although the present invention is described with reference to a rolling shutter door comprising a plurality of laths, those skilled in the art will appreciate that other types of rolling shutter door are envisaged within the scope of the present invention. For example, the rolling shutter door  4  may be of continuous construction. For example, the rolling shutter door  4  may comprise a continuous sheet of a suitable flexible material (e.g. flexible textiles (such as cloths), elastomeric materials, rubbers, and plastics (such as but not limited to: polyester, polyvinylchloride). 
     The rolling shutter door  4  is attached to the barrel by fixing means  28 , for example by means of nuts and bolts as illustrated in  FIG. 16 . The rolling shutter door  4  is attached to the barrel  20  an upper latitudinal edge  26  (that is to say, an edge of the door that is in use is substantially horizontal with respect to the ground, and is on an opposite edge to that of bottom rail  10 ). The upper latitudinal edge  26  may include at least the uppermost lath  6   a  (and optionally one or more laths  6  adjacent the uppermost lath  6   a ) of the rolling shutter door  4 . The rolling shutter door  4  may be attached to the barrel  20  by any suitable fixing means, for example by means of bolts, nuts, rivets, screws, nails, and the like. With reference to  FIG. 16 , the barrel comprises an indentation  20   a  to accommodate the upper latitudinal edge  26  (e.g. uppermost lath  6   a ) of the rolling door, such that the first coil of the rolling shutter door  4  is provided in a substantially circular shape. The indentation  20   a  therefore allows for subsequent coils of the rolling door to wrap around the first coil of the rolling shutter door in an efficient manner. The uppermost lath(s)  6   a  may be made of a reinforced material, or have an increased thickness (relative to other laths at a lower position in the rolling door), to provide additional support at the points, which the rolling shutter door  4  is attached to the barrel. 
     The rolling shutter door  4  is attached to the barrel  20  at one or more portions of the rolling shutter door  4 . With reference to  FIG. 16 , the rolling shutter door  4  is attached to the barrel  20  at least two laths  6  of the rolling shutter door  4  by fixing means  28  (e.g. bolts and nuts). In particular,  FIG. 16  shows the rolling shutter door  4  fixed at an uppermost lath  6   a , and at an intermediate lath  6   b . The uppermost lath  6   a  may be rigidly fixed to the barrel (i.e. is tightly secured to the barrel, and does not move relative to the barrel). The intermediate lath  6   b  may be loosely fixed (i.e. is not tightly bound to the barrel, and has some flexibility to move [e.g. pivot] about the barrel). The intermediate lath  6   b  is selected such that the rolling shutter door  4  when in the closed position is provided with one full coil about the barrel. Providing fixing means  28  at an uppermost lath  6   a  and an intermediate lath  6   b  as illustrated in  FIG. 16  provides increased strength to the door assembly  2 . In particular, the increased strength of the door assembly  2  mitigates the risk of damage to the rolling shutter door  4  and the barrel  20  when moving between the open and closed positions. Fixing an intermediate lath  6   b  and uppermost lath  6   a  further means that the weight of the curtain is distributed around the barrel, and further provides means of locking the rolling shutter door when in the closed position (i.e. prevents the rolling shutter door  4  being lifted from the bottom). 
     The rolling shutter door  4  may additionally be attached to the barrel  20  by one or more portions across its longitudinal dimension (i.e. its width).  FIG. 16  depicts fixing means  28  in cross-section, but the skilled person will appreciate that several such cross-sections may be present along the width of the rolling shutter door  4  and barrel  20 . 
     With reference to  FIGS. 4 and 5 , the dashed lines about the barrel  20  represent an outer extremity of the rolling shutter door  4  when the rolling door  4  is rolled about the barrel  20  in an open position, or when the rolling door  4  is unrolled from the barrel  20  in a closed position. The size of the roll changes as the rolling shutter door  4  moves from an open position (coiled about the barrel), to an open position (at least partially unrolled from the barrel). Referring to  FIG. 4 , when the rolling shutter door  4  is rolled around the barrel  20  to provide the rolling shutter door in an open position, the distance between the barrel  20 , and the outmost, outwardly facing surface of rolling shutter door  4  is distance D 1 . With reference to  FIG. 5 , when the rolling shutter door  4  is unrolled from the barrel  20  to provide the rolling shutter door in a closed position, the distance D 2  is less than distance D 1 . Door assemblies comprising rolling shutter doors therefore have a lintel portion  18 , which can accommodate the difference in distances D 1  and D 2 . This may be achieved through positioning the barrel  20  and the supporting brackets  22  relative to the wall of the building defining the opening (e.g. a top wall), such that enough clearance is provided between the barrel, the rolling shutter door, and a wall of the building proximal the opening. As shown in  FIG. 4 , the bottom rail  10  and lowermost lath  6  are retained in the guide members  16  to prevent the rolling shutter door  4  from becoming loose. Adequate clearance is required to allow the rolling shutter door to be freely moved into a fully open position (i.e. the rolling shutter door  4  does not occlude the opening  14 ). 
     The provision of adequate space to accommodate the roll of rolling shutter door  4  in the lintel portion  18  when rolled about barrel  20  leads to a gap  36  between the rolling shutter door  4 , the opening  14 , and a surface  14   a  of the building proximal the opening (e.g. a top wall defining and positioned above an opening in a building). The surface  14   a  proximal the opening  14  illustrated in  FIG. 4  may form part of the interior of the building (e.g. an interior top wall defining and positioned above an opening in a building). As shown, the gap  36  is at least partially defined by a surface of the rolling shutter door  4 . The surface of the rolling shutter door  4  is an exterior-facing surface, relative to the building (that is to say a surface of the rolling shutter door which faces towards the exterior S 2  of the building in a closed position). Alternatively, the surface of the rolling shutter door  4  is interior facing relative to the building (that is to say a surface of the rolling shutter door which faces towards the interior S 1  of the building in a closed position). 
     As shown in  FIGS. 4 and 5 , the gap  36  is formed between an exterior-facing surface of the rolling shutter door  4  (that is facing towards the exterior S 2  of the building), a surface  14   a  positioned above, and adjacent to, the opening  14  (which may be a top wall defining the opening  14  in a building), and the opening  14 . The lintel portion  18  comprising barrel  20  and support brackets  22  are accommodated in the interior side S 1  of a building. 
     When the rolling shutter door is in a closed position, the gap  36  is a route through which sound, smoke, heat and the like may undesirably leak into the lintel portion  18 . If the lintel portion  18  is not provided with a housing  18   a , then the gap  36  is a route for smoke, heat, sound and the like to directly enter into the interior side S 1  of the building. If the lintel portion is provided with a housing  18   a , then the housing  18   a  can harbour smoke, heat, sound and the like before emanating therefrom into the interior S 1  of the building. The presence of the gap  36  therefore compromises (negatively impacts) the performance of door assemblies comprising rolling shutter doors, particularly insulating door assemblies (e.g. thermally insulated door assemblies, acoustically insulated door assemblies). 
     A sealing assembly comprising a brush head has been proposed to provide closure of this gap, but it has been found that such seals provide sub-optimal insulating performance, and, in particular, poor acoustic insulating performance. 
       FIGS. 6 and 7  depict a prior art sealing assembly  38 , which extends across the gap  36  from surface  14   a  of the building in which the door assembly is installed, to a surface of the rolling shutter door  4 , to provide a seal (brush seal). The sealing assembly  38  comprises a brush head  40  and a bracket  42 . The bracket  42  is fixed to surface  14   a  of the building that is proximal or adjacent opening  14 , and the brush head  40  extends horizontally from the bracket  42  across the gap  36 . The tip of the brush head  40  contacts a surface of the rolling shutter door (for example the exterior-facing surface of the rolling shutter door) to provide a seal. Sealing assemblies comprising a brush head  40  (such as that illustrated in  FIGS. 6 and 7 ) provide a poor seal that does not adequately prevent sound, smoke, heat and the like entering the lintel portion  18  through gap  36 . The brush head  40  does not adequately prevent sound, smoke, heat and the like entering the interior side S 1  of the building from the exterior side S 2  of the building, or vice versa. The bristles of the brush allow passage of sound, smoke, heat and the like to pass freely between the bristles. Moreover, the top of the brush head  40  only contacts the rolling shutter door  4 , and does not form a tight seal. Further still, over time, the bristles of the brush head  40  may become worn through contact with the rolling shutter door  4  as it moves between the open and closed positions, thus further reducing the efficiency of the brush seal. 
     There is therefore a need for an improved seal for door assemblies comprising a rolling shutter door, particularly acoustically insulating door assemblies, and thermally insulating door assemblies. More particularly, there is a need for a seal, which provides adequate acoustic and/or thermal insulation for the gap  36  in a door assembly. 
     It is an object of the present invention to address one or more of the problems outlined above. 
     SUMMARY OF INVENTION 
     According to a first aspect of the present invention, there is provided door assembly for an opening in a building, wherein the door assembly is installable to the opening. The door assembly comprises a rolling shutter door moveable between a closed position wherein the opening is occluded by the rolling shutter door, and an open position wherein the opening is at least partially clear of occlusion by the rolling shutter door. The door assembly further comprises a sealing assembly for sealing a gap between the rolling shutter door, the opening, and a surface of the building proximal the opening. The seal comprises a resiliently deformable member, and a sealing member. The resiliently deformable member and sealing member are each mutually positioned such that the resiliently deformable member co-operates with the sealing member when the rolling shutter door is in the closed position to seal the gap. 
     Advantageously, the resiliently deformable member and sealing member co-operate when the rolling shutter door is in the closed position to provide a seal, which prevents or mitigates passage of sound, smoke, heat, and the like through the gap. The sealing assembly according to the present invention therefore improves the performance of the rolling shutter door assembly. Moreover, the sealing assembly according to the present invention is advantageously configured to form a seal when the rolling shutter door is in the closed position, but is configured to allow free movement of the rolling shutter door between the open and closed positions. 
     The resiliently deformable member may comprise a resiliently deformable sheet. In embodiments, the resiliently deformable mating member is one or more resiliently deformable sheets as described herein. Preferably, the resiliently deformable member is a resiliently deformable sheet. Advantageously, the resiliently deformable sheet may configured to have sealing and non-sealing configurations, as described in more detail herein. 
     Preferably, the resiliently deformable member is positioned on a surface of the rolling shutter door. Advantageously, providing the resiliently deformable member positioned on the rolling shutter door means the sealing member and resiliently deformable member can be mutually positioned, such that the seal forms when the rolling shutter door is in a desired position (i.e. the closed position) 
     Optionally said surface of the rolling shutter door faces the exterior of the building when in a closed position. This means that the gap is provided with a seal before smoke, heat, sound and the like can emanate into the interior of the building, leading to an improvement in performance of the rolling shutter door assembly. 
     Preferably, the resiliently deformable member is positioned on an upper portion of the surface of the rolling shutter door. This means that the rolling shutter door can be moved into a fully closed position before the sealing assembly forms the seal across the gap. Allowing the rolling shutter door to move into the fully closed position again improves the overall performance (e.g. acoustic insulation, thermal insulation) of the rolling shutter door assembly. 
     In embodiments, the resiliently deformable member is attached to the rolling shutter door by attachment means, preferably by attachment means at portions of the resiliently deformable member that are proximal to the outer perimeter of the resiliently deformable member (e.g. towards the edges of the resiliently deformable member). In embodiments, the resiliently deformable member is affixed to the rolling shutter door at least at an upper edge of the resiliently deformable member, and at a lower edge of the resiliently deformable member. In other words, the resiliently deformable member may be affixed to the rolling shutter door at two edges, rather than at a single edge leaving one edge unaffixed. The upper and lower edges of the resiliently deformable member are in relation to an upper and lower portions of the rolling shutter door either side of the resiliently deformable member, to which the resiliently deformable member is attached. A central portion of the resiliently deformable member is free of the rolling shutter door (i.e. the central portion is not affixed to the rolling shutter door) allowing the resiliently deformable member to move freely between the sealing and non-sealing configurations. 
     The sealing member is mutually positioned relative to the resiliently deformable member to co-operate when the rolling shutter door is in the closed position to form the seal. 
     Preferably, the sealing member may be positioned on an interior wall of the building, proximal the opening therein. This means that the sealing member can cooperate with the resiliently deformable member, before heat, smoke, sound and the like can emanate into the interior of the building. 
     Optionally the sealing member may be positioned above the opening. Although the sealing member may be positioned on any wall of the building (e.g. an upper wall) that defines the opening, it may alternatively be positioned within the lintel portion of the door assembly (e.g. on an interior wall of the housing that houses the barrel and/or support brackets). 
     Preferably, the resiliently deformable member may have a sealing configuration when the rolling shutter door is in the closed position and a non-sealing configuration when the rolling shutter door is in the open position, and optionally a non-sealing configuration when the rolling shutter door is in a partially open position. Provision of a non-sealing configuration allows the resiliently deformable member to be removed from cooperation with the sealing member when the seal is not required; thus enabling the rolling shutter door to be freely moved between the open and closed positions. 
     Further preferably, the resiliently deformable member may protrude from the surface of the rolling shutter door in the sealing configuration. For example, the resiliently deformable member may be urged to protrude away from laths of the rolling shutter door, when the rolling shutter door is in a closed position (e.g. when a portion of the rolling shutter door on which the resiliently deformable member is positioned is in a planar configuration). In such embodiments, the resiliently deformable member has sufficient rigidity to maintain the sealing configuration. Advantageously, the resiliently deformable member extends away from a surface of the rolling shutter door towards the mutually positioned sealing member. As such, the protruding resiliently deformable member bridges the gap to cooperate with the sealing member to provide a seal across the gap. 
     The resiliently deformable member may be deformed (e.g. flexed) into the sealing and/or non-sealing configuration. 
     The resiliently deformable member may be deformed into the sealing configuration by movement of the rolling shutter door from a closed position to an open position, and is able to relax back into the non-sealing configuration by movement of the rolling shutter door from a closed position to an open position. The resiliently deformable member may be deformed into the sealing configuration by movement of the rolling shutter door from an arcuate configuration to a planar configuration, and is able to relax back into the non-sealing configuration by movement of the rolling shutter door from a planar configuration to an arcuate configuration. 
     Alternatively, the resiliently deformable member may be deformed into the non-sealing configuration by movement of the rolling shutter door from a closed position to an open position, and is able to relax back into the sealing configuration by movement of the rolling shutter door from a closed position to an open position. The resiliently deformable member may be deformed into the non-sealing configuration by movement of the rolling shutter door from an arcuate configuration to a planar configuration, and is able to relax back into the sealing configuration by movement of the rolling shutter door from a planar configuration to an arcuate configuration. 
     The resiliently deformable member may be made from any suitable material, for example but not limited to, plastics, flexible textiles (e.g. fabrics, cloths), rubber, plastics, elastomeric materials and the like, and optionally combinations thereof. Preferably, the resiliently deformable member comprises, or consists of, a reinforced plastic material, such as reinforced polyvinyl chloride sheets. 
     In use, when the rolling shutter door is in an arcuate configuration in the open position, the resiliently deformable sheet may complement the configuration of the rolling shutter door. Advantageously, the resiliently deformable member may not inhibit the rolling shutter door moving between open and closed positions. The resiliently deformable member can simply complement the configuration of the rolling shutter door, and be effectively rolled up with the rolling shutter door when in the open position. 
     Preferably, the non-sealing configuration of the resiliently deformable member may be complementary to an arcuate conformation of the rolling shutter door when the rolling shutter door is in the open position. When in the open position, the rolling shutter door is rolled about barrel, and as such has an arcuate configuration in the manner of a coil or spiral. The resiliently deformable member may complement the configuration (e.g. arcuate) of the rolling shutter door when rolled about the barrel. In other words, the resiliently deformable member may have an arcuate configuration in the non-sealing configuration, which resembles a portion of the circumference of a coil of the rolling door, when coiled about the barrel. 
     The resiliently deformable member may be under tension (e.g. stretch) across the portion of the rolling shutter door to which it is attached, when in the non-sealing configuration. Alternatively, the resiliently deformable member may be in a resting state (i.e. not under tension), when in the non-sealing configuration. 
     The resiliently deformable member may be further provided with a protecting member, which may be positioned on a portion of the rolling shutter door (e.g. a lath) underneath the resiliently deformable member. Advantageously, the protecting member mitigates strain on the resiliently deformable member when in the non-sealing configuration. The protecting member may be a resiliently deformable material (e.g. a sponge-like material) to cushion the resiliently deformable member against the rolling shutter door. In embodiments, the resiliently deformable material may urge the resiliently deformable member from a non-sealing configuration into a sealing configuration. 
     One or more resiliently deformable members may be provided across the width of the rolling shutter door. Preferably, the resiliently deformable member may be of continuous construction, and extend substantially across the entire width of the rolling shutter door. Where one or more resiliently deformable members are provided, or wherein a resiliently deformable member of continuous construction is provided, one or more complementary sealing members may be provided to co-operate with the resiliently deformable members. 
     Preferably, the sealing member may have a mating configuration when the rolling shutter door is in the closed position and a resting configuration when the rolling shutter door is in the open position, said mating and resting configurations being different configurations. 
     Alternatively, the mating and resting configurations of the sealing member may be the same. The sealing member may have a mating and resting configuration that is inherently complementary to the sealing configuration of the resiliently deformable member. For example, the sealing member may be made of an injection moulded plastic or rubber, configured to cooperate with the sealing configuration of the resiliently deformable member. 
     Preferably, the mating configuration of the sealing member may be complementary to the sealing configuration of the resiliently deformable member. Such configurations provide a close sealing arrangement, to mitigate passage of smoke, heat, sound and the like through the gap and into the interior of the building. Of course, non-complementary configurations may be envisaged, but it is preferred that the mating configuration of the sealing member is complementary to the sealing configuration of the resiliently deformable member to provide the most effective seal possible. 
     Preferably, the sealing member may protrude towards the interior of the building when the sealing member is in the resting configuration. This means the sealing member bridges a portion of the gap, to be in closer proximity to the resiliently deformable member when in the sealing configuration. 
     The sealing member may comprise a cavity, optionally wherein the cavity is at least partially filled with an insulating material. The cavity may be at least partially filled with an insulating material, which improves the performance of the rolling shutter door assembly. 
     The cavity may be defined between the sealing member, and a portion of a wall defining the opening. Alternatively, where a lintel portion is provided in the rolling shutter door assembly, the cavity may be defined between the sealing member and the lintel portion (e.g. an interior of a housing containing the barrel and support brackets). Alternatively still, the sealing member may further comprise a frame, which at least partially defines the cavity. 
     Preferably, the sealing member may be resiliently deformable. As such, both the resiliently deformable member and the sealing member may be resiliently deformable. 
     The sealing member may be deformed (e.g. flexed) into the mating and/or resting configuration. 
     The sealing member may be deformed into the mating configuration by contact with the resiliently deformable member. As such, in use, the resiliently deformable member may cooperate with the sealing member causing the sealing member to deform thus forming the seal. 
     Preferably, the sealing member is comprised of a more flexible material than the resiliently deformable member. Advantageously, this means that the resiliently deformable member is capable of deforming the sealing member into the mating configuration to form the seal when the door is in the closed position. 
     The sealing member may be urged from the mating configuration back into the resting configuration by means of a resiliently deformable insulating material provided in the cavity of the sealing member. When the seal is broken (i.e. the rolling shutter door is in the open position), the resiliently deformable insulating material may expand to urge the sealing member into its resting state. When the seal is formed (i.e. the rolling shutter door is in the closed position) the resiliently deformable insulating member deforms with the sealing member into the mating configuration. Alternatively, the sealing member may return back to the resting configuration from the mating configuration of its own volition. 
     The sealing member may comprise a resiliently deformable mating member. The resiliently deformable mating member may be made of a more flexible material than the resiliently deformable member. The resiliently deformable mating member may comprise a resiliently deformable sheet. In embodiments, the resiliently deformable mating member is one or more resiliently deformable sheets as described herein. Preferably, the resiliently deformable member is a continuous resiliently deformable sheet. 
     The sealing member (optionally the resiliently deformable mating member) and the resiliently deformable member may both comprise one or more resiliently deformable sheets. As described above, preferably, the sealing member is more flexible than the resiliently deformable member. In such embodiments, the sealing member may comprise a resiliently deformable sheet that is thinner than the resiliently deformable member. Additionally or alternatively, the sealing member may comprise a resiliently deformable sheet that is made of a more flexible material than the resiliently deformable member. In instances, the sealing member (and optionally the resiliently deformable mating member) may comprise, or consist of a polyester reinforced polyvinyl chloride sheet (e.g. Tarpol™). In instances the resiliently deformable member comprise, or consist of a polyvinyl chloride sheet. 
     When in the sealing configuration, the resiliently deformable member may cooperate with the resiliently deformable mating member to induce the resiliently deformable mating member into the mating configuration from the resting configuration. Advantageously, providing a sealing assembly, which cooperates by means of an induced fit, provides a tight seal that efficiently mitigates the passage of smoke, heat, sound and the like through the gap and into the interior of the building. The seal provided by the induced fit advantageously means that the sealing member and the resiliently deformable member adopt complimentary configurations, and fit tightly together, without gaps. 
     The sealing member may comprise or consist of the resiliently deformable mating member. The resiliently deformable member may be positioned directly on a wall (e.g. an upper wall above an opening) of the building defining the opening. A cavity may be provided between the resiliently deformable mating member and the wall to which the sealing member may be fixed. The cavity may be at least partially filled with an insulating (e.g. acoustically insulating) material to improve the performance of the door assembly. 
     In embodiments, the cavity is at least partially filled with a resiliently deformable insulating material, wherein the resiliently deformable insulating material urges the resiliently deformable mating member from the mating configuration into the resting configuration, when the rolling shutter door is in the open position. 
     Preferably, the interface between the sealing member and the resiliently deformable member when cooperating to provide the seal may be smooth (i.e. free from visible projections, indentations, recesses, lumps and the like). In other words, the portions of the sealing member and resiliently deformable member which come into contact to form the seal may be smooth, so as to reduce friction when the rolling shutter door moves between the closed position (and a seal is provided) to an open position (the seal is disengaged). 
     The sealing member may extend across the substantially the entire width of the rolling shutter door. Alternatively or additionally, one or more sealing members may be provided across the width of the rolling shutter door. One or more resiliently deformable members may be mutually positioned to contact one or more sealing members when the rolling shutter door is in the closed position. 
     In use, when the rolling shutter door is moved from the closed position to the open position, the resiliently deformable member may flex to allow the seal to be broken. In instances, the sealing member (optionally the resiliently deformable mating member) and the resiliently deformable member flex to allow the seal to be broken when the rolling shutter door moves from the closed position to the open position. 
     Door assemblies according to the present invention may comprise one or more additional seals in addition to the sealing assemblies according to the present invention. 
     Preferably, the rolling shutter door may comprise a plurality of laths, wherein one or more of the laths comprises a cavity. Optionally the cavity may be at least partially filled with an insulating material, preferably an acoustically insulating material. Advantageously, laths comprising cavities can provide insulation to the rolling shutter door assembly, thus further improving the performance of the rolling shutter door assembly. 
     Preferably, the door assembly may further comprise: a first guide member and a second guide member for guiding the rolling shutter door between the open position and the closed position; and a barrel positioned between the guides for supporting the rolling shutter door, the barrel being configured to rotate and receive more of the rolling shutter door when said door is rolled to an open position. 
     The opening may be defined by two opposing side walls, a top wall and an opposing bottom wall. The first guide member and the second guide member may be positioned (i) relative to the opposing side walls; or (ii) relative to the opposing top and bottom walls; to guide the rolling shutter door. 
     Preferably, at least one of the first guide member and the second guide member may comprise one or more guide sealing members, wherein the one or more guide sealing members may contact the rolling shutter door when in the closed position. Guide members may comprise regions that could allow smoke, heat, sound and the like to travel, in particular in areas that provide a track in which the rolling shutter door is received. Guide sealing members are advantageously provided to provide further insulation, preferably acoustic insulation, to the guide members, thus further improving the performance of the rolling shutter door assembly. 
     Preferably, at least one of the first guide member and the second guide member may comprise a reversibly attachable bracket. Advantageously, this allows the user of the rolling shutter door assembly to remove the reversibly attachable bracket to access the rolling shutter door, and if desired, to remove the rolling shutter door. 
     Preferably, at least one of the first guide member and the second guide member may comprise a cavity, optionally wherein the cavity may be at least partially filled with an insulating material, preferably an acoustically insulating material. Advantageously, providing a cavity, which can be filled with an insulating material in the guide members, further improves the performance of the rolling shutter door assembly. Preferably, at least one of the first guide member and the second guide member comprising the cavity may further be provided with one or more perforations, wherein the one or more perforations are positioned to provide a route through which sound and/or heat can travel from an external surface of the guide member into the cavity. Advantageously, where the insulating material is acoustically insulating, sound can thus be adsorbed by the first guide member and/or the second guide member, thus improving the performance of the door assembly. Advantageously, wherein the insulating material is thermally insulating, thermal insulation can thus be provided by the first guide member and/or the second guide member, thus improving the performance of the door assembly. 
     Preferably, at least one of the first guide member and the second guide member may comprise a recess/channel for receiving the rolling shutter door, wherein the recess has a depth that is from 2 to 20% of the width of the rolling shutter door, optionally from 3 to 15% the width of the rolling shutter door, and optionally still from 5 to 10% the width of the rolling shutter door. Advantageously, providing a recess in at least one of the first guide member and the second guide member provides increased stability of the rolling shutter door against impact (e.g. by a user, or due to wind on the external surface of the rolling shutter door), and moreover improves the thermal and acoustic performance of the door assembly. The recess of channel may be dimensioned to allow the rolling shutter door to flex when in the closed position. 
     Preferably, the bottom rail of the rolling shutter door may comprise a cavity, optionally wherein the cavity may be at least partially filled with an insulating material, preferably an acoustically insulating material. 
     Preferably, the bottom rail of the rolling shutter door may comprise a seal positioned on the underside of the bottom rail (i.e. the surface facing the floor during use) to provide a seal between the floor and the rolling shutter door when in the closed position. The seal is preferably resiliently deformable. The seal therefore advantageously prevents passage of sound, heat, smoke and the like from one side of the rolling shutter door to the other, thus improving the performance of the rolling shutter door. Preferably, the bottom rail is further provided with at least one lip, which protrudes from the bottom rail and extends downwardly towards the floor to protect the seal from impact (e.g. impact from a user) and/or to protect the seal from being squashed by the weight of the door. Preferably, the at least one bottom lip protrudes downwardly such that the seal contacts the floor (when the rolling door is in the closed position) before the at least one lip. The seal thus deforms to provide a seal with the floor surface, and the at least one lip then contacts the floor surface to support the rolling door and to prevent the seal from being squashed by the weight of the door. Preferably, the bottom rail comprises two lips, the first lip being positioned on a surface of the bottom rail which faces internally (i.e. the interior of the building during use), and the second lip being positioned on a surface of the bottom rail which faces externally (i.e. the exterior of the building during use). The at least one lip may advantageously provide additional support to the base of the rolling shutter door when in the closed position to prevent unwanted compression of the seal. The guide members, support brackets, and barrel provided in door assemblies in accordance with the present invention may be made of any suitable material. One or more of the guide members and barrel may comprise one or more materials selected from the group consisting of metals and metal alloys (e.g. Steel, aluminium), wood, plastics, and the like. 
     According to a second aspect of the present invention, there is provided a method of sealing a gap between a rolling shutter door of a door assembly and an opening in a building to which the door assembly is installed, wherein the rolling shutter door is moveable between a closed position wherein the opening is occluded by the rolling shutter door, and an open position wherein the opening is at least partially clear of occlusion by the rolling shutter door, the method comprising: 
     providing a resiliently deformable member; 
     providing a sealing member; 
     positioning each of the resiliently deformable member and the sealing member relative to one, or the other, of the door assembly and the opening in the building; such that the resiliently deformable member co-operates with the sealing member when the rolling shutter door is in a closed position to seal the gap. 
     Preferably, the method may further comprise positioning the resiliently deformable member on the rolling shutter door of the door assembly; and positioning the sealing member on a wall of the building proximal the opening. 
     The resiliently deformable member and sealing member in accordance with the second aspect of the present invention may be in accordance with the resiliently deformable members and sealing members described with respect to the first aspect of the present invention. 
     According to a third aspect of the present invention, there is provided a sealing member for providing a seal in a door assembly, the door assembly being installed to an opening in a building, and comprising a rolling shutter door moveable between a closed position wherein the opening is occluded by the rolling shutter door, and an open position wherein the opening is at least partially clear of occlusion by the rolling shutter door. The sealing member comprises a resiliently deformable mating member; a support frame, for supporting the resiliently deformable member; and means for fixing the sealing member to a wall of the building defining the opening. 
     Preferably, the sealing member comprises a cavity, optionally wherein the cavity may be at least partially filled with an insulating material, preferably an acoustically insulating material. Advantageously, the sealing member may be provided with additional insulation, which can further improve the performance of the rolling shutter door assembly. 
     Optionally, the sealing member comprises a cavity, wherein the cavity is at least partially filled with a resiliently deformable insulating material. Advantageously, the resiliently deformable insulating material may urge the resiliently deformable mating member from a mating configuration into a resting configuration. 
     The sealing member in accordance with the third aspect of the present invention may be in accordance with the sealing member described with respect to the second aspect of the present invention. 
     According to a fourth aspect of the present invention, there is provided a sealing assembly kit for providing a seal to a door assembly, the door assembly being installed to an opening in a building, and comprising a rolling shutter door moveable between a closed position wherein the opening is occluded by the rolling shutter door, and an open position wherein the opening is at least partially clear of occlusion by the rolling shutter door. The sealing assembly kit comprises a sealing member according to the first or third aspect of the present invention; and a resiliently deformable member according to the first aspect of the present invention, configured to be positioned on an exterior surface of the rolling shutter door. 
     Door assemblies according to the present invention may be used in one or more of commercial, industrial, public, and domestic buildings. Door assemblies of the invention may be provided for one or more of security purposes, fire prevention or fire retardation, thermal insulation (e.g. refrigerators and/or freezers), and acoustic insulation (e.g. theatre doors, cinema doors, music studio doors, television and film production set doors). 
     In embodiments, it may be desirable to provide a door assembly that is insulated e.g. thermally insulated, acoustically insulated. In embodiments, it may be desirable to provide a door assembly that is acoustically insulated, that is to say the door assembly is configured to absorb noise emanating from one side of the door, and to reduce transmission of said noise to the other side of the door. It embodiments, it may even be desirable to substantially prevent transmission of said noise from one side of the door assembly. Door assemblies that are acoustically insulated according to the present invention may be particularly desirable in commercial, industrial and public buildings such as, but not limited to, factories, theatres, music studios, cinemas, television and film production sets and the like. For example, it may be desirable to reduce noise emanating from machinery in factories or industrial sites (e.g. water treatment sites, waste treatment sites), which could cause a nuisance to residential areas. 
     Door assemblies according to the present invention are for an opening in a building. The opening allows passage from the exterior of a building into the interior of the building, or visa versa. The opening may provide passage for one or more persons, vehicles, and the like. As such, the opening in the building may be of any suitable dimensions, and the door assemblies according to the present invention may be configured to complement the size of said opening. 
     The opening may be defined by two opposing side walls, a top wall and a bottom wall opposing the top wall. Within the context of the present invention, in embodiments, the bottom wall may be the ground. In buildings suitable for use in accordance with the present invention, one or more of the top wall, bottom wall and side walls may be constructed of one or more of brick, concrete, breeze blocks, wood, steel, and the like. 
     Door assemblies according to the present invention are installable to an opening in a building. In embodiments, door assemblies according to the present invention may be installed in the opening. Those skilled in the art will understand in the opening to mean the door assembly is installed within the opening that is defined by one or more of the top wall, bottom wall and side walls (e.g. in the manner of a conventional internal door frame). In alternative embodiments, the door assemblies according to the present invention may be installed around the opening. Those skilled in the art will understand around the opening to mean the door assembly is installed on either an internal or external surface of the building at one or more of the top wall, bottom wall, and side walls defining the opening. 
     Door assemblies according to the present invention comprise a rolling shutter door. The rolling shutter door has a closed position wherein the opening is occluded by the rolling door, and an open position wherein the opening is at least partially clear of occlusion by the rolling shutter door. Rolling shutter doors are well known to those skilled in the art, and typically may be rolled up into a coil. Rolling shutter doors within the context of the present invention are therefore flexible doors. 
     In embodiments, rolling shutter door may be provided in the form of one or more curtains (not illustrated). Each curtain may be comprised of one or more interlocking laths; or may be of continuous construction. In embodiments, the rolling shutter door comprises two curtains positioned in an overlying formation, such that a cavity is provided between each curtain (not illustrated). The cavity may be at least partially filled with an insulating material to improve the performance of the rolling shutter door. For example, the rolling shutter door may be for the purposes of acoustic insulation, and an acoustically insulating material such as Rockwool® and/or mineral wool may be provided in the cavity. Further examples of suitable materials for at least partially filling the cavity may include thermally insulating materials (e.g. Rockwool®, mineral wool, polystyrene, polyurethane foam, and combinations thereof), fire retardant materials (e.g. Rockwool®, and/or mineral wool), and the like. Other suitable materials may include for example plaster (e.g. gypsum) and/or calcium silicate (e.g. calcium board). 
    
    
     
       LIST OF FIGURES 
       The present invention will now be described by way of example only, and with reference to the accompanying Figures in which: 
         FIG. 1  illustrates a rear-side (e.g. interior of a building) elevated view of a prior art door assembly comprising a rolling shutter door in its fully closed position. 
         FIG. 2  illustrates a rear-side elevated view of the prior art door assembly of  FIG. 1  in its fully open position. 
         FIG. 3  illustrates a rear-side elevated view of the prior art door assembly of  FIGS. 1 and 2  in a partially open position, wherein the rolling shutter door partially occludes the door passage. 
         FIG. 4  illustrates an end view of a barrel and a rolling shutter door comprised in the prior art door assembly of  FIGS. 1-3 , wherein the rolling shutter door is in its fully open position. 
         FIG. 5  illustrates an end view of a barrel and a rolling shutter door comprised in the prior art door assembly of  FIGS. 1-3 , wherein the rolling shutter door is in the closed position. 
         FIG. 6  illustrates a partial end view of the prior art door assembly of  FIGS. 1-5  comprising a prior art sealing assembly. 
         FIG. 7  illustrates an enlarged view of the prior art sealing assembly illustrated in  FIG. 6 . 
         FIG. 8  illustrates a partial end view of a door assembly according to the present invention, wherein the rolling shutter door is in its fully open position, a sealing member is in a resting configuration, and a resiliently deformable member is in a non-sealing configuration. 
         FIG. 9  illustrates a partial end view of the door assembly illustrated in  FIG. 8 , wherein the rolling shutter door is its fully closed position, and the resiliently deformable member and sealing member are co-operating to seal the gap. 
         FIGS. 10, 11 and 12  illustrate side cross-sectional views of a resiliently deformable member comprised in a sealing assembly according to the present invention. 
         FIG. 13  illustrates a resiliently deformable member in the sealing configuration. 
         FIG. 14  illustrates a side cross-sectional view of a sealing member comprised in a sealing assembly according to the present invention, wherein the sealing member is in a resting configuration. 
         FIG. 15  illustrates a side view of a barrel comprised in the door assemblies of  FIGS. 1-3 , wherein the barrel has the rolling shutter door coiled about itself. 
         FIG. 16  illustrates a side cross-sectional view of the barrel illustrated in  FIG. 15 , wherein the rolling shutter door is at least partially uncoiled from the barrel. 
         FIGS. 17, 18 and 19  illustrate plan cross-sectional views of guide members comprised in a door assembly according to the present invention. 
         FIG. 20  illustrates a side cross-section view of a bottom rail comprised in a rolling door in accordance with the present invention. 
     
    
    
     DETAILED DESCRIPTION 
     The invention will be now be described in detail with reference to the accompanying Figures. The description of particular embodiments is not intended to be limiting on the scope of the invention, which is defined in the appended claims. 
     In accordance with the present invention, the term ‘resiliently deformable’ means having a first configuration, which can be induced through application or release of a biasing force, into a second configuration. Upon removal of said biasing force, the second configuration returns to the first configuration. ‘Resiliently deformable’ materials may be flexible, elastic, spongy, and the like. Preferably, ‘resiliently deformable’ as used herein means capable of being repeatedly deformed, without losing structural integrity or performance. For instance, resiliently deformable objects include sponges, foams, elastic bands and the like. 
     Insulating materials in accordance with the present invention may comprise acoustically insulating materials, thermally insulating materials, fire-retardant materials, and the like. Insulating materials as described herein are selected from an acoustically insulating material, a thermally insulating material, a fire-retardant material, and combinations thereof. Acoustically insulating materials may include Rockwool™, mineral wool, polyurethane foam, rubber, sponge, plaster (e.g. gypsum), composite boarding materials (e.g. plasterboard) and combinations thereof. Preferably, acoustically insulating materials are selected from Rockwool®, mineral wool and combinations thereof. Thermally insulating materials may include Rockwool®, mineral wool, polystyrene, polyurethane foam, rubber, sponge, plaster (e.g. gypsum), composite boarding materials (e.g. plasterboard, insulating boards) and combinations thereof. Preferably, thermally insulating materials are selected from Rockwool®, mineral wool, polystyrene, polyurethane foam, and combinations thereof. Fire retardant materials may include Rockwool™, mineral wool, composite boarding materials (e.g. fire-resistant boards) and combinations thereof. Preferably, fire retardant materials are selected from Rockwool®, mineral wool, and combinations thereof. Other suitable generally insulating materials may include for example plaster (e.g. gypsum) and/or calcium silicate (e.g. calcium board). 
     Resiliently deformable insulating materials in accordance with the present invention are materials which have both resiliently deformable and insulating properties. Suitable resiliently deformable insulating materials include sponges, foams, fabrics, and the like. Resiliently deformable insulating materials in accordance with the present invention may comprise an acoustically insulating material, a thermally insulating material, a fire-retardant material, and combinations thereof. Resiliently deformable insulating materials in accordance with the present invention be selected from an acoustically insulating material, a thermally insulating material, a fire-retardant material, and combinations thereof. Preferably, the resiliently deformable insulating material is a sponge. Preferably, the resiliently deformable insulating material is a foam. 
     The term ‘sheet’ in accordance with the invention means a thin, substantially two-dimensional material having a length and or width that is substantially greater than its depth. ‘Sheet’ within the context of the present invention may include a sheet having a thickness from 1 to 10 mm, optionally from 2 to 8 mm, and optionally still from 3 to 6 mm. 
     Resiliently deformable sheets in accordance with the present invention are resiliently deformable within the meaning described above. Resiliently deformable sheets may be made of suitable flexible textiles (e.g. cloths), rubbers, plastics, elastomeric materials, and optionally combinations thereof. The resiliently deformable sheets in accordance with the present invention may comprise, or consist of polyvinyl chloride. Resiliently deformable sheets in accordance with the present invention may have a thickness from 1 to 10 mm, optionally from 2 to 8 mm, optionally still from 3 to 6 mm (e.g. around 4 mm, around 5 mm). Resiliently deformable sheets in accordance with the present invention may comprise, or consist of polyester reinforced polyvinyl chloride. Resiliently deformable sheets in accordance with the present invention may be a polyester reinforced polyvinyl chloride sheet, wherein the polyester reinforced polyvinyl chloride sheet may has a thickness from 2 to 5 mm (e.g. around 3 mm, around 4 mm). Suitable examples of polyester reinforced polyvinyl chloride include TARPOL™ sheets, e.g. TARPOL™ TS 700 commercially available from Gale Pacific (www.galpacific.com). 
     It will be apparent to those skilled in the art that resiliently deformable sheets in accordance with the present invention may be selected according to the desired flexibility and deformability by changing the thickness thereof and/or by selecting suitable materials. For example, those skilled in the art will appreciate that polyester reinforced polyvinylchloride (e.g. Tarpol™) is more flexible than polyvinylchloride sheets. 
       FIGS. 8 and 9  illustrate a partial door assembly in accordance with the present invention wherein the rolling shutter door  4  is in its open position and its closed position respectively. The door assembly of the present invention shares many features of a known door assembly, such as that described above and illustrated in  FIGS. 1-5 , and as such those features may be described below as needed for context with the same reference numerals as used in  FIGS. 1-5 . However, the present invention also includes a number of inventive features, which will be described below. 
     The door assembly of the invention comprises, in addition to a rolling shutter door  4 , a sealing assembly  44  comprising a sealing member  46  and a resiliently deformable member  48 . The resiliently deformable member  48  and sealing member  46  are each mutually positioned such that the resiliently deformable member  48  co-operates with the sealing member  46  when the rolling shutter door  4  is in the closed position to seal the gap  36 , as can be seen in  FIG. 9 . 
     The resiliently deformable member  48  is provided on an upper portion of the rolling shutter door  4 . With reference the  FIG. 8 , the resiliently deformable member  48  (illustrated by the thickened black line) is co-rolled (i.e. coiled) with barrel  20 . The dashed lines in  FIG. 8  illustrate the size of the coil of rolling shutter door when fully coiled around the barrel  20 . 
     As shown in  FIG. 9 , the resiliently deformable member  48  is positioned at an upper portion of the rolling shutter door  4  to seal the gap  36 ; and the sealing member  36  is mutually positioned to co-operate with the resiliently deformable member  48 . The sealing member  46  is positioned above and adjacent to the opening  14 , for example, the top wall defining the opening of a building. 
     With reference to  FIG. 8 , when the rolling shutter door  4  is in an open position (wherein the rolling shutter door  4  is at least partially coiled about the barrel  20 ) the resiliently deformable member  48  (represented by the thick black line in  FIG. 8 ) has a non-sealing configuration. The non-sealing configuration of the resiliently deformable member  48  complements the configuration of the rolling shutter door  4 , more particularly, complements the arcuate conformation of the rolling shutter door  4  when coiled about the barrel  20 . The resiliently deformable member  48  shown in  FIG. 8  lies substantially flush with a surface of the rolling shutter door  4 . In the non-sealing configuration, the resiliently deformable member  48  spans at least part of the circumference of an arcuate portion of the rolling shutter door  4 , when the rolling shutter door  4  is provided in a coiled configuration about barrel  20 . 
     When the rolling shutter door  4  is in the closed position, the rolling shutter door  4  is uncoiled from the barrel  20 , and the resiliently deformable member  48  has a sealing configuration. With reference to the embodiment illustrated in  FIG. 9 , the sealing configuration of the resiliently deformable member  48  protrudes from the surface of the rolling shutter door in the form of a bulb. 
     In the sealing configuration, the resiliently deformable member  48  co-operates with the sealing member  46 . The resiliently deformable member  48  and the sealing member  46  have complementary configurations when the rolling shutter door  4  is in the closed position to provide the seal, as illustrated in  FIG. 9 . As discussed in more detail below, the complementary shapes arise from an induced fit, wherein the resiliently deformable member  48  in the sealing configuration induces a complementary shape in the sealing member  46 . As such, the resiliently deformable member  48  and the sealing member  46  have interlocking configurations to provide an effective seal. 
     The sealing member  46  has a mating configuration as illustrated in  FIG. 9 ; and a resting configuration as illustrated in  FIG. 8 . As shown in  FIG. 8 , the sealing member  46  has a resting configuration when the rolling shutter door  4  is in an open position wherein the sealing member  46  protrudes outwardly into the gap  36  towards the interior S 1  of the building. The sealing member  46  also has a mating configuration when the rolling shutter door is in the closed position, which is complementary to the sealing configuration of the resiliently deformable member  48 . The sealing member  46  is deformed by the resiliently deformable member  48  (when in the sealing configuration) into a corresponding reciprocal shape, as shown in  FIG. 9  (discussed in further detail below). 
     The sealing member  46  is mutually positioned relative to the resiliently deformable member to co-operate when the rolling shutter door  4  is in the closed position. The sealing member  46  is positioned such that it is in a complementary position to contact the resiliently deformable member  48  when the rolling shutter door  4  is in the closed position, as illustrated in  FIG. 9 . 
       FIG. 9  illustrates the sealing assembly  44  shown in  FIG. 8 , with the exception that the rolling shutter door  4  is provided in a closed position. When the rolling shutter door  4  is in the closed position, the resiliently deformable member  48  contacts and co-operates with the sealing member  46  to provide a seal. The resiliently deformable member  48  is affixed to the rolling shutter door  4 , such that when the rolling shutter door  4  is in the closed position, the resiliently deformable member  48  protrudes away from the rolling shutter door  4 , as illustrated in  FIG. 9 . The resiliently deformable member  48  is urged away from the rolling shutter door  4  to protrude therefrom by virtue of the rolling shutter door  4  moving from an arcuate configuration to a planar configuration. 
     The resiliently deformable member  48  in the sealing configuration induces the sealing member  46  to adopt a complementary mating configuration, as illustrated by the change of configuration of the sealing member  46  between  FIG. 8  and  FIG. 9 . In the sealing configuration, the resiliently deformable member  48  abuts the sealing member  46  causing it to deform inwardly from the resting configuration to the mating configuration. The resiliently deformable member  48  thus creates a recess in the sealing member  46 , in which resiliently deformable member  48  rests. Advantageously, this arrangement allows a secure and tight seal to be formed across the gap  36 . Preferably, the sealing member  46  comprises a more flexible material than the resiliently deformable member  48 , such that the sealing member  46  is deformed by the resiliently deformable member  48  (in the sealing configuration) from the resting configuration into the mating configuration. 
       FIGS. 10 to 12  illustrate a resiliently deformable member  48  comprised in a sealing assembly  44  of the door assembly of the present invention in sealing ( FIG. 12 ) and non-sealing ( FIGS. 10 and 11 ) configurations. 
       FIGS. 10 and 11  illustrate the resiliently deformable member  48  wherein the laths  6  of the rolling shutter door  4  are in an arcuate configuration, as would be the case when the rolling shutter door is in an open position being rolled around the barrel  20 . 
     With reference to  FIG. 10 , the resiliently deformable member  48  is attached to the rolling shutter door  4  at one or more laths  6  by attachment means  50 . The resiliently deformable member  48  is attached to the rolling shutter door at portions that are proximal the outer perimeter of the resiliently deformable member  48 , as shown in  FIG. 10 . More particularly, the resiliently deformable member  48  is affixed to rolling shutter door  4  at an upper edge  52  of the resiliently deformable member  48 , and at a lower edge  54  of the resiliently deformable member  48 . A central portion  58  of the resiliently deformable member  48  is free of the rolling shutter door  4 , that is to say the central portion  58  is not affixed to the rolling shutter door  4 . The central portion  58  being free of the rolling shutter door  58  allows the resiliently deformable member  48  to move freely between the sealing and non-sealing configurations, as discussed in more detail below with reference to  FIG. 12 . 
       FIG. 10  additionally depicts a magnified view of a plurality of laths  6  comprised in a rolling door  4  in accordance with the present invention, and interlocking members  8  as previously discussed in respect of  FIGS. 1-5 . The interlocking members have complementary shapes, such that an interlocking member  8   a  of a lath may interlock with an interlocking member  8   b  of another lath  6 . For example, the interlocking members  8  may be ‘snap-fit’ interlocking members. The interlocking members  8  enable adjacent laths to pivot with respect to one another. 
     Although  FIG. 10  illustrates the resiliently deformable member  48  and rolling shutter door  4  in cross-section, those skilled in the art will appreciate that the resiliently deformable member  48  may be secured by attachment means  50  at multiple cross-sections. That is to say the attachment means  50  may be provided at a plurality of cross-sections along the width of the rolling shutter door  4 . The attachment means  50  may even extend substantially continuously across the width of the resiliently deformable member, for example, where the attachment means is an adhesive. 
     Attachment means  50  may be any suitable means for attaching the resiliently deformable member to the rolling shutter door  4 , for example, an adhesive, screws, nails, rivets, bolts and nuts, or a combination thereof. 
       FIG. 11  illustrates the resiliently deformable member  48  of  FIG. 10 , with the exception that protecting member  62  is additionally provided. The protecting member  62  is provided to mitigate strain on the resiliently deformable member  48  when in the non-sealing configuration. For example, the protecting member  62  may be a resiliently deformable material (e.g. sponge, foam) to cushion the resiliently deformable member  48  against the laths  6  of the rolling shutter door  4 . 
       FIG. 12  illustrates the resiliently deformable member  48  in a sealing configuration, wherein the laths  6  of the rolling shutter door  4  are in a planar configuration, as would be the case when the rolling shutter door is in a closed position. In contrast to the non-sealing configuration of the resiliently deformable member  48  illustrated in  FIGS. 10 and 11 , in the sealing configuration illustrated in  FIG. 12 , the resiliently deformable member  48  protrudes away from the rolling shutter door  4 . More particularly, the central portion  58  of the resiliently deformable member protrudes away from laths  6  of the rolling shutter door  4 . The protrusion of the central portion  58  resembles a bulb, as also illustrated in  FIG. 9 . 
     As the rolling shutter door  4  moves from an arcuate configuration when coiled about barrel  20 , as illustrated in  FIGS. 10, 11 , to a planar configuration as the rolling shutter door is dispensed from the barrel, as illustrated in  FIG. 12 , the distance between two notional points on the rolling shutter door decreases. For example, the distance between each attachment means  50  in  FIG. 10  is less than the distance between each attachment means  50  in  FIG. 12 . In other words, the circumference of an arcuate portion of the rolling shutter door when coiled about the barrel is greater than the length of the rolling shutter door when in a planar configuration. This reduction in length causes the resiliently deformable member  48  to be urged away from laths  6  of the rolling shutter door  4  to form a protrusion, as illustrated in  FIG. 12 . 
     The distance  60  by which the resiliently deformable member  48  protrudes is determined by the length of the resiliently deformable member  48  and/or the distance between the attachment means  50  at which the resiliently deformable member  48  is attached to the rolling shutter door  4 . The distance between attachment means  50  may be from 1 to 5 times the width  56  of a lath  6 , optionally 1.5 to 3 times the width  56  of a lath  6 , and optionally still around 2 times the with  56  of a lath  6 . 
     With reference to  FIG. 13 , the distance  60  (indicated as r 1  in  FIG. 13 ) which the resiliently deformable member  48  protrudes may be calculated by consideration of distance r 1  and a plurality of notional circles, wherein the circumference of said notional circles are in tangential contact (i.e. at a single point). As shown in  FIG. 13 , the profile of the protruding resiliently deformable member  48  may resemble a bell curve. The desired distance  60  may be adjusted by considering the relationship between the length of central portion  58  and the arc length of angles as illustrated in  FIG. 13 . The length of the bell curve shape formed by central portion  58  is approximately half that of the length of the inverse side of the bell shape i.e. the bell curve length is 2 − πr(θ/360) where θ is the angle across which the central portion  58  extends. The extent of the distance r 1  as shown in  FIG. 13 , can be calculated using the following equation: r 1 =2 (r−(r cos θ)) where r is the radius of the notional circle and e is the angle across which the central portion  58  extends. 
       FIG. 14  (providing a detailed view of the sealing member illustrated in  FIGS. 8 and 9 ) illustrates a sealing member  46  comprised in a sealing assembly  44  in accordance the present invention. The sealing member  46  is configured to co-operate with the resiliently deformable member  48  when the rolling shutter door  4  is in the closed position to provide a seal across the gap  36 . 
     The sealing member  46  comprises a mating member  68 , which is positioned to contact the resiliently deformable member  48  when the rolling shutter door  4  is in the closed position to provide a seal. As such, the mating member  68  co-operates with the resiliently deformable member  48  to provide a seal. The mating member  68  has the resting configuration (as shown in  FIG. 14 ) when the rolling shutter door  4  is in the open position, and the mating configuration when the rolling shutter door  4  is in a closed position, as discussed above with respect to the sealing member  46 . 
     The sealing member  46  may be a resiliently deformable sealing member. With reference to  FIG. 14 , the mating member  68  comprised in the sealing member  46  is resiliently deformable to provide a resiliently deformable mating member  68 . The resiliently deformable mating member  68  is flexible, such that when the resiliently deformable member  48  makes contact with the mating member  68  to form the seal  44 , the mating member  68  is induced into a shape that is complementary to the sealing configuration of the resiliently deformable member  48 . As such, the resiliently deformable member  48  in the sealing configuration induces the mating member  68  into a corresponding, complementary mating configuration. This arrangement advantageously improves the efficacy of the sealing assembly  44  by virtue of the complementary configurations of the resiliently deformable member  48  and the mating member  68 , as illustrated in  FIG. 9 . In this arrangement, the mating member  68  is more flexible that the resiliently deformable mating member  48 , thus allowing the resiliently deformable member  48  in the sealing configuration to induce the mating member  68  to adopt the mating configuration ( FIG. 9 ). 
     With reference to  FIG. 14 , the sealing member  46  further comprises a support frame  66 . The mating member  68  is secured to the support frame  66 . The support frame  66  comprises one or more lips  70  for receiving a portion of the mating member  68 . The support frame  66  further comprises one or more receiving channels  72  into which the mating member  68  may be inserted and secured thereto. The mating member  68  is secured to the lip  70  and/or in the receiving channel  72  by any suitable means, for example adhesive, screws, nails, bolts, rivets and the like. 
     The receiving channel  72  is slidably moveable relative to the base  74  of the support  66 . Those skilled in the art will appreciate that this is just one-way of achieving the arrangement described further with reference to  FIG. 14 , and other ways of achieving the arrangement will be apparent to those skilled in the art. As shown in  FIG. 14 , the channel  72  is disassociated from the rest of the body of the support  66 , for example having an L configuration that rests against the base  74 . As such, the channel  72  is moveable with respect to the base  74  of the support  66 . In use, as the resiliently deformable member  48  contacts the sealing member to co-operate and form a seal, this arrangement provides additional flexibility in the position of the mating member  68  when the resiliently deformable member is in the sealing configuration. 
     The sealing member  46  further comprises a cavity  76  ( FIG. 14 ). The cavity  76  may be at least partially filled with an insulating material, for example a thermally insulating material and/or an acoustically insulating material. Preferably, the cavity  76  is at least partially filled with an acoustically insulating material. The cavity may comprise a chamber  76   a , which is comprised in the support  66 , and a natural cavity  76   b  defined by a void between the support and the mating member  68 . 
     Alternatively, a mating member  68  comprised in the sealing member  46  may be directly affixed to a wall (e.g. an upper wall above the opening) in a building (in the absence of the support frame  66 ), to create a cavity between the wall and the mating member  68  (not illustrated). The cavity may be at least partially filled with an insulating material, for example a thermally insulating material or an acoustically insulating material. Preferably, the cavity is at least partially filled with an acoustically insulating material. 
     The cavity  76  of the support  66  as illustrated in  FIG. 14  and as described above may be at least partially filled with a resiliently deformable insulating material. Alternatively, the cavity between the wall and the mating member  68  as described above may be at least partially filled with a resiliently deformable insulating material. The resiliently deformable insulating material is flexible, and is capable of being deformed into a mating configuration upon application of a force, and of returning to its original, resting configuration when the force is removed (e.g. a sponge). 
     The resiliently deformable insulating material may provide support to the resiliently deformable mating member  68 , such that the mating member  68  is biased to a resting, non-sealing configuration, as shown in  FIG. 14 . Preferably, the cavity  76  is substantially filled with a resiliently deformable insulating material. As such, when the resiliently deformable member  48  contacts the mating member  68  to form the seal  44 , and induces the mating member  68  into the mating configuration, the resiliently deformable insulating material also deforms through contact with the mating member  68 . When the seal  44  is broken (i.e. when the rolling shutter door is moved from the closed position to the open position), the resiliently deformable insulating material returns to its non-deformed, resting configuration, and thus may induce the mating member  68  to return to the non-sealing, resting configuration ( FIG. 14 ) from the complimentary mating configuration. 
     Where the resiliently deformable insulating material is provided in the cavity  76  or in the cavity between the wall and the mating member as described above, the resiliently deformable mating member  68  may comprise or consist of a resiliently deformable sheet. Preferably the resiliently deformable sheet is a polyester reinforced polyvinyl chloride sheet. Suitable examples of polyester reinforced polyvinyl chloride include TARPOL™ sheets, e.g. TARPOL™ TS 700 commercially available from Gale Pacific (www.galepacific.com). 
     Alternatively, the cavity  76 , or cavity between the wall and the mating member  68 , as described above is vacant. Where the cavity  76 , or the cavity between the wall and the mating member as described above are vacant, the resiliently deformable mating member  68  may comprise or consist of plastic material, such as polyvinyl chloride. Preferably, the mating member  68  is a polyvinyl chloride sheet. 
       FIG. 15  illustrates a side-on view of the barrel  20  depicted in prior art  FIGS. 1-3  wherein the rolling shutter door  4  is coiled around the barrel  20 , such that the rolling shutter door  4  is in an open position. A resiliently deformable member  48 , comprised in the sealing assembly  44  according to the present invention, is provided in a non-sealing configuration as described above. The resiliently deformable member  48  complements the configuration of the rolling shutter door  4  in its coiled configuration about the barrel  20 . The resiliently deformable member  48  may lie substantially flush with a surface of the rolling shutter door  4 , wherein the surface may face the interior of a building S 1 , or the exterior of a building S 2  when the rolling door  4  is in the closed position. 
       FIG. 16  illustrates the same barrel  20  as depicted in  FIG. 15 , wherein the rolling shutter door  4  has been at least partially uncoiled from the barrel  20 . The rolling shutter door  4  comprises a plurality of laths  6 , and one or more of the plurality of laths  6  may comprise a cavity C. The cavity C may be at least partially filled with an insulating material to improve the performance (e.g. the acoustic performance and/or the thermal performance and/or the fire performance) of the rolling shutter door  4 . For example, the rolling shutter door  4  may be an acoustically insulating door, and an acoustically insulating material may be provided to at least partially fill the cavity C. Further examples of suitable materials for at least partially filling the cavity C may include thermally insulating materials, fire retardant materials, and the like. 
     The guide members  16  may comprise a channel  90  for receiving laths  6  of the rolling shutter door  4 .  FIG. 17  illustrates a plan view of a guide member  16  that can be incorporated into door assemblies according to the present invention. A channel  90  is provided into which the rolling shutter door  4  is received, and preferably secured in position. The channel  90  is defined between a body portion  80  of the guide member and a portion  86  extending therefrom to create a cavity  94  into which the rolling shutter door  4  may be received. Of course, the channel  90  needs to be of sufficient width to allow the rolling shutter door  4  to move freely between the open and closed positions. As such, the channel  90  acts as a track in which the rolling shutter door  4  is received and guided between the open and closed positions. 
     With continued reference to  FIG. 17 , the guide members  16  may comprise a reversibly attachable bracket  86  to allow easy installation and removal of rolling shutter door  4 , as shown in  FIG. 17 . The reversibly attachable bracket  86  is reversibly attached to a body portion  80  of the guide member  16 . Suitable means for attaching the reversibly attachable bracket  86  to the body portion  80  may include, for example, bolts  88  and nuts as illustrated in  FIG. 17 , screws, nails, and the like. Advantageously, the reversibly attachable bracket  86  can be removed to access the rolling shutter door  4 , for example to remove the rolling shutter door  4  for maintenance. 
     The guide members comprise a body portion  80  that is at least partially hollow. As illustrated in  FIG. 17 , the body portion  80  is at least partially filled with an insulating material  82 , for example a thermally insulating material or an acoustically insulating material. Preferably, the body portion  80  is at least partially filled with an acoustically insulating material. Providing an insulating material in the body portion  80  of guide members  16  provides further improvement to the performance of the door assemblies by mitigating the transfer of noise, smoke, heat, and the like from one side S 1  of the door assembly, to another S 2 . 
     The body portion  80  further comprises a lip portion  84 , as illustrated in  FIG. 17 . The lip portion  84  and portion  86  (e.g. reversibly attachable bracket  86 ) collectively define part of the channel  90  into which the rolling shutter door  4  is received. The lip portion  84  increases the size of the cavity  94  into which the rolling shutter door  4  is received. This increase in the size of the cavity  94  provides a region (cavity  94 ) in which the passage of smoke, sound, heat and the like may blocked and subsequently adsorbed by the guide member. For example, as illustrated in  FIG. 17 , the guide members  16  are provided with a guide seal member  78  that extends across the cavity  94  from the body portion  80  to contact the rolling shutter door  4 , thus providing a seal and improving the performance of the door assembly. The guide seal member  78  may be an acoustically insulating guide seal member  78 , wherein the acoustically insulating guide seal member  78  is made of an acoustically insulating material. Moreover, a section  92  of the body portion  80  which defines cavity  94  may be provided with one or more perforations (not illustrated). The one or more perforations may allow for access (for example access for sound waves, thermal energy, smoke) to the insulating material  82  within the body portion  80  to improve the performance of the door assembly. 
     Guide members  16  may further comprise a baffle member  96  to further restrict or prevent travel of sound, fire, smoke, heat and the like, as illustrated in  FIG. 18 . The baffle member  96  may be an acoustic baffle member  96 . In  FIG. 18 , the baffle member  96  is provided adjacent the body portion  80  to provide additional insulation e.g. thermal or acoustic insulation. The baffle member  96  comprises an insulating material, for example an acoustically insulating material or a thermally insulating material. The baffle member  96  may comprise one or more perforations (not illustrated) to allow penetration of sound, fire, smoke, heat and the like into the baffle member  96  to improve the insulation properties. 
     Guide members  16  may further comprise an insulating member  100 . As illustrated in  FIG. 19 , the insulating member  100  substantially surrounds the portion  98  and/or the reversibly attachable bracket  86  of the guide member  16 , to provide additional insulation to the channel  90  and cavity  94 . Channel  90  is open to receive the rolling shutter door  4 . The insulating member  100  may be made of any suitable insulating material, preferably an acoustically insulating material. 
     The bottom rail  10  may be provided with a bottom seal  102 , to provide further insulation. As illustrated in  FIG. 20 , the bottom seal  102  may be made of a suitable insulating material, for example an acoustically insulating material or a thermally insulating material. 
     The blocking member  20  may comprise a lip  104 , which protrudes outwardly and downwardly towards the direction of the floor to provide additional protection to the bottom seal  102  from, for example, user impact, fire, sound, smoke, heat and the like. The blocking member  20  can be made of a reinforced material to provide additional strength to the bottom rail  10 , and to the rolling shutter door  4 . In addition, the lip  104  can support the base of the rolling shutter door  4  when in the closed position, thus preventing the seal  102  from being compressed or damaged.