Patent Publication Number: US-11028594-B2

Title: Soffit panel attachment system

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims the benefit of U.S. Provisional Application Ser. No. 62/826,339, filed Mar. 29, 2019, entitled “SOFFIT PANEL ATTACHMENT SYSTEM,” which is hereby incorporated by reference in its entirety and for all purposes. 
    
    
     FIELD 
     The present disclosure generally relates to an attachment device suitable for use with soffit material, in particular a vented attachment device and methods of installation of same. 
     BACKGROUND 
     Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of the common general knowledge in the field. 
     In many instances, the exposed exterior under surfaces of overhanging sections of a roof structure are lined with soffit material. Soffit materials are generally installed by fixing soffit boards directly to the under surface of the overhanging sections of a roof, for example to a nailing surface commonly known as blocking adjacent the external vertical wall of the building and an opposing fascia or sub-fascia. 
     Commonly under-eave vents are placed in an opening in the soffit material to provide ventilation to an attic space beneath the roof structure. Such vents operate in conjunction with roof or ridge vents to provide ventilation within the attic space by enabling a natural flow of air through the attic space. In practice, air rises and exits the attic space through the roof vents causing further cooler air to be drawn in through the under-eave vents. 
     It is desirable to provide an attachment device capable of securing soffit material in position such that the soffit material lines the exposed exterior under surface of the overhanging section of the roof whilst also providing under-eave ventilation. 
     SUMMARY 
     The systems, methods and devices described herein address one or more problems as described above and associated with current soffit lining systems. The systems, methods and devices described herein have innovative aspects, no single one of which is indispensable or solely responsible for their desirable attributes. Without limiting the scope of the claims, the summary below describes some of the advantageous features. 
     According to the present disclosure there is provided an attachment device comprising an attachment surface extending substantially orthogonally from a central portion and at least two flanges extending substantially laterally from the central portion such that a U-shaped receiving channel is formed whereby the central portion forms the base of the U-shaped receiving channel and the flanges form opposing side arms of the U-shaped receiving channel. In some embodiments the U-shaped receiving channel is remote from the attachment surface. 
     In some embodiments the central portion comprises a vented section having a first major face and a second major face spaced apart from each other and an intermediate portion positioned between the first and second major faces. The vented section further comprises a plurality of apertures extending from an outer surface of the first major face, through the intermediary portion to an outer surface of the second major face such that an open channel extends between the first and second major faces of the attachment device. The apertures are configured to allow air to move through the vented section between the first major face and the second major face. In certain embodiments, the diameter of each aperture ranges between, for example, ⅛″ and 1/16″, but may have other sizes such as between ¼″ and 1/16″. 
     In some embodiments, each aperture is configured to have either a circular or hexagonal cross sectional shape. Other suitable cross-sectional shapes could also be used, for example, square shapes, triangular shapes, any other regular or irregular polygonal shapes, oval, obround, or stadium shapes, and the like. In some implementations, circular or hexagonal cross sectional shapes as illustrated herein may provide advantageous aperture packing efficiency and strength in the designated vented section. 
     In some embodiments, each aperture is configured to act as an air inlet which allows cool air to be drawn in to the attic space when in use as a soffit material lining the underside of eaves. The net free ventilation figure can be used to calculate how many feet of the vented soffit attachment device is required to line the underside of eaves based on the calculated Net Free Area (NFA) to achieve a balanced ventilation system for a particular roof system. 
     One advantage of certain embodiments of the attachment device is that there is an aesthetically pleasing method of securely fastening soffit material to the exposed under surface of an overhanging roof structure. For example, in some embodiments the disclosed attachment devices are fastened to an eave structure by inserting one or more fasteners through a vertical attachment surface that is not visible from the exterior when a soffit panel has been installed, such that the finished roof system does not have any soffit panel fasteners such as nails that are visible from the exterior. In some embodiments, the attachment devices include an aesthetically pleasing regular array of shapes such as circular openings, hexagonal openings, or the like. 
     A further advantage is that there may be an increase in the net free ventilation figure achieved by the roof system, for example, due to the inclusion of ventilation features within an attachment device for soffit panel articles. In some embodiments, the disclosed attachment systems and devices may be used with soffit panels that additionally include ventilation features. 
     One advantage of certain embodiments is that the attachment device may suitable for use in high risk fire zone areas. For example, the length of each opening between the first and second major faces of an attachment device may be sufficient to prevent certain particulate materials, such as some embers, sparks, or the like, from entering an attic space. 
     In a further embodiment, there is provided a soffit lining system comprising one or more various embodiments of the attachment device together with a soffit material. 
     In a further embodiment, there is provided a soffit lining system comprising one or more various embodiments of the attachment device together with a vented soffit material. In some embodiments the vented soffit material comprises a vented fiber cement article, the vented fiber cement article comprising:
         a panel comprising a first major face, a second major face and an intermediate portion positioned between the first and second faces such that the first face, second face and intermediate portion together form the panel; and   a plurality of openings extending between the first and second major faces of the panel through the intermediate portion such that a vented portion is formed in the panel;   wherein the surface area of the plurality of openings of the vented fiber cement article comprises between approximately 9% and 15.5% of the total surface area of the vented portion of the fiber cement article per linear foot such that the net free ventilation of the vented fiber cement article is between 10 and 16 square inches per linear foot.       

     The present application also provides a method of installing a soffit material, the method comprising:
         attaching a first and second attachment device to a first and second surface respectively, wherein the u-shaped receiving channels of the first and second attachment devices are spaced apart and opposite each other;   inserting a soffit material into the space between the opposing u-shaped receiving channels of the first and second attachment devices such that the soffit material is held in place by opposing u-shaped receiving channels.       

     In some embodiments, the first attachment device is attached to the fascia or sub-fascia of the overhanging roof structure and the second attachment device is attached to the building wall structure such that the soffit material when installed covers the exposed under surface of the roof structure. 
     When the example embodiment of the attachment device is used on the underside of eaves to attach soffit material, it is preferred to provide the attachment device in long lengths for example between 2 ft and 8 ft long. Additional lengths, such as 4 ft, 12 ft, 20 ft, or longer, and/or any intermediate length therebetween, may also be provided. 
     In some embodiments, a soffit lining system comprises a first soffit panel attachment device coupled to a building substrate, the first soffit panel attachment device comprising a first attachment surface lying adjacent to the building substrate, a first central portion perpendicular to the building substrate and coupled to the first attachment surface at a first end of the first central portion, and a first plurality of flanges extending from the first central portion at a second end of the first central portion opposite the first end, the first plurality of flanges disposed parallel to the first central portion to form a first U-shaped channel aligned with the first central portion and opening away from the building substrate; a second soffit panel attachment device coupled to a framing member spaced outwardly from the building substrate, the second soffit panel device comprising a second attachment surface lying adjacent to the framing member, a second central portion parallel to the first central portion and coupled to the second attachment surface at a first end of the second central portion, and a second plurality of flanges extending from the second central portion at a second end of the second central portion opposite the first end, the second plurality of flanges disposed parallel to the second central portion to form a second U-shaped channel aligned with the second central portion and opening toward the first U-shaped channel, wherein the second soffit panel attachment device comprises a plurality of openings extending through the second central portion; and a soffit panel having a substantially planar surface comprising a first edge and a second edge opposite the first edge, the soffit panel disposed at least partially within the first and second U-shaped channels, the first edge being disposed within the first U-shaped channel and resting on one of the first plurality of flanges, the second edge being disposed within the second U-shaped channel and resting on one of the second plurality of flanges, such that the first and second soffit panel attachment devices support the soffit panel along a length of the soffit panel. 
     In some embodiments, the plurality of openings are oriented perpendicular to the soffit panel to provide an airflow path between a space below the soffit panel and a space above the soffit panel. In some embodiments, the plurality of openings comprise a regularly spaced grid of circular openings covering at least 0.4 square inches of each square inch of total surface area of the grid. In some embodiments, the plurality of openings comprise a regularly spaced grid of hexagonal openings covering at least 0.4 square inches of each square inch of total surface area of the grid. In some embodiments, the first soffit panel attachment device does not include a plurality of openings extending through the first central portion. In some embodiments, the first soffit panel attachment device includes a plurality of openings extending through the first central portion. In some embodiments, the first soffit panel attachment device is substantially identical to the second soffit panel attachment device. 
     In another embodiment, a soffit panel attachment device comprises a central portion comprising a first major face, a second major face parallel to the first major face, and an intermediate portion disposed between the first major face and the second major face; an attachment surface comprising a substantially planar surface extending perpendicularly from the central portion at a first end of the central portion; a first flange parallel to the central portion, the first flange extending from the central portion proximate the first major face at a second end of the central portion opposite the first end; a second flange parallel to the first flange, the second flange extending from the central portion proximate the second major face at the second end such that the first flange, the second flange, and the second end of the central portion form a U-shaped channel sized and shaped to receive a soffit covering material; and a plurality of openings extending through the intermediate portion to form a plurality of airflow paths through the central portion from the first major face to the second major face. 
     In some embodiments, the plurality of openings comprise a regularly spaced grid of hexagonal apertures. In some embodiments, the plurality of openings comprise a regularly spaced grid of circular apertures. In some embodiments, individual apertures of the plurality of apertures are spaced apart by a distance of between approximately 0.2 inches and approximately 0.3 inches. In some embodiments, the soffit panel attachment device comprises a single integrally formed piece of a polymeric material. In some embodiments, the plurality of openings generally define a ventilated area of the central portion, and wherein the plurality of openings occupy at least 0.4 square inches of each square inch of the ventilated area. In some embodiments, each opening of the plurality of openings has a diameter of between approximately ⅛ inch and approximately 1/16 inch. In some embodiments, the attachment surface comprises a plurality of apertures extending therethrough, each aperture of the plurality of apertures sized and shaped to receive a mechanical fastener therethrough. In some embodiments, the soffit panel attachment device has a length of between approximately 2 feet and approximately 8 feet. In some embodiments, the length of the soffit panel attachment device is approximately 4 feet. 
     For the purposes of this specification, the term ‘comprise’ shall have an inclusive meaning. Thus it is understood that it should be taken to mean an inclusion of not only the listed components it directly references, but also non specified components. Accordingly, the term ‘comprise’ is to be attributable with as broad an interpretation as possible and this rationale should also be used when the terms ‘comprised’ and/or ‘comprising’ are used. 
     Further aspects or embodiments of the present invention will become apparent from the ensuing description which is given by way of example only. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Certain embodiments of the present disclosure will now be described, by way of example only, with reference to the accompanying drawings. From figure to figure, the same or similar reference numerals are used to designate similar components of an illustrated embodiment. 
         FIG. 1A  is a perspective view of an example attachment device in accordance with the present technology. 
         FIG. 1B  is a front view of the attachment device of  FIG. 1A . 
         FIG. 1C  is a side view of the attachment device of  FIG. 1A . 
         FIG. 1D  is a top view of the attachment device of  FIG. 1A . 
         FIG. 2A  is a perspective view of an example attachment device in accordance with the present technology. 
         FIG. 2B  is a front view of the attachment device of  FIG. 2A . 
         FIG. 2C  is a side view of the attachment device of  FIG. 2A . 
         FIG. 2D  is a top view of the attachment device of  FIG. 2A . 
         FIG. 3A  is a perspective view of an example attachment device in accordance with the present technology. 
         FIG. 3B  is a front view of the attachment device of  FIG. 3A . 
         FIG. 3C  is a side view of the attachment device of  FIG. 3A . 
         FIG. 3D  is a top view of the attachment device of  FIG. 3A . 
         FIG. 4A  is a perspective view of an exemplary soffit lining system comprising the attachment device of  FIG. 1A  together with an exemplary soffit material. 
         FIG. 4B  is a side sectional view of the exemplary soffit lining system of  FIG. 4A .  FIG. 4C  is a perspective view of an alternative embodiment of the system of  FIG. 4A  in which one attachment device is non-ventilated. 
         FIG. 5  is a side section view of a further exemplary soffit lining system. 
     
    
    
     DETAILED DESCRIPTION 
     Although the present disclosure is described with reference to specific examples, it will be appreciated by those skilled in the art that the present disclosure may be embodied in many other forms. The embodiments discussed herein are merely illustrative and do not limit the scope of the present disclosure. 
     In the description which follow, like parts may be marked throughout the specification and drawings with the same reference numerals. The drawing figures are not necessarily to scale and certain features may be shown exaggerated in scale or in somewhat generalized or schematic form in the interest of clarity and conciseness. 
     Referring now to the drawings and specifically to  FIGS. 1A to 1D , there is shown an attachment device  100  in accordance with the present technology. Attachment device  100  comprises a central portion  102  having a first major face  104  and a second major face  106 , wherein the first and second major faces  104 ,  106  are spaced apart from each other. Central portion  102  further comprises a plurality of apertures  102   a  which extend from an outer surface of the first major face  104 , through an intermediary portion  108  to an outer surface of the second major face  106  such that each aperture forms an open channel extending between the first and second major faces  104 ,  106  of the attachment device  100 . Apertures  102   a  are configured to allow air to move through the vented section of the central portion  102  between the first major face  104  and the second major face  106 . In use, this allows each aperture  102   a  to act as an air inlet to the area beneath a roof structure. 
     Vented attachment device  100  further comprises an attachment surface  110  extending substantially orthogonally from at least a portion of central portion  102 . In use, the attachment surface  110  of the vented attachment device is secured to a building substrate, for example, a structural wall and/or a fascia board, such as by one or more mechanical fasteners (e.g., nails, screws, etc.) and/or by a chemical adhesive. In some embodiments, the attachment surface  110  comprises one or more apertures  111  extending therethrough for receiving mechanical fasteners for attaching the attachment device  100  to a substrate. 
     Attachment device  100  further comprises a flange portion  104   a ,  106   a  extending substantially laterally from each of the first and second major faces  104 ,  106  such that a U-shaped receiving channel  112  is formed whereby the intermediate portion  108  forms the base of the U-shaped receiving channel  112  and flange portions  104   a  and  106   a  respectively form opposing side arms of the U-shaped receiving channel  112 . In the embodiment shown, the U-shaped receiving channel  112  is remote from the surface engaging portion  110 . In an alternative embodiment, the surface engaging portion  110  is positioned adjacent to the U-shaped receiving channel  112 . The size and shape of the U-shaped receiving channel  112  is such that a soffit material can be held securely within the interior of the U-shaped receiving channel  112  without the need to use additional fixing. Accordingly, in use, once the attachment devices have been located as desired on the exposed exterior surfaces under the roof structure, the soffit material can be placed and securely held in position without the need for additional fasteners. 
     In some embodiments, each of the central portion  102 , the surface engaging portion  110  and the flange portions  104   a ,  106   a  are integrally formed with each other to form a single unit. 
     In the example configuration of  FIGS. 1A-1D , the plurality of apertures  102   a  within central portion  102  are provided as a continuous pattern in a series of columns  102   b  and rows  102   c . Referring specifically to  FIG. 1D , the cross-sectional shape of each aperture  102   a  is hexagonal, wherein the length of each side in the hexagonal shape is approximately 0.05″. In this example configuration, the apertures may be large enough to meet one or more regulatory standards associated with roof ventilation (e.g., the Californian Building Code (CBC) 2016, Chapter 7A requirement of 1/16″ diameter) but small enough to prevent insect intrusion. 
     In some embodiments, each aperture is configured to have either a circular or hexagonal cross sectional shape. Other suitable cross-sectional shapes could also be used, for example, square shapes, triangular shapes, any other regular or irregular polygonal shapes, oval, obround, or stadium shapes, and the like. In some implementations, circular or hexagonal cross sectional shapes as illustrated herein may provide advantageous aperture packing efficiency and strength in the designated vented section. In some embodiments, each aperture is between ⅛″ and 1/16″ in diameter. 
     Turning now to  FIGS. 2A to 2D and 3A to 3D , there are shown further examples of the attachment device of the present disclosure which vary in a number of aspects such as, for example, the diameter size of the aperture, the cross-sectional shape of the aperture, the width of the central portion and/or attachment surface, etc. In the configuration illustrated in  FIGS. 2A-2D , the diameter of the apertures  102   a  is 0.125″. The apertures  102   a  of the configuration of  FIGS. 3A-3D  have a circular cross-sectional area. 
     Table One below provides several example configurations of packing arrangements and associated total vented surface area per square inch in the vented area of the attachment device (e.g., the vented portion of the central portion  102 ), for both a circular and hexagonal cross sectional shape with a diameter of 1/16″ and ⅛″ respectively. 
     
       
         
           
               
               
               
               
               
               
             
               
                 TABLE ONE 
               
               
                   
               
               
                   
                   
                   
                   
                   
                 total surface 
               
               
                   
                   
                   
                   
                 Surface area 
                 area open for 
               
               
                   
                   
                 Area 
                   
                 per type 
                 ventilation 
               
               
                 Size 
                 Type 
                 (sq. in.) 
                 Quantity 
                 (sq. in.) 
                 per sq. in. 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                  1/16″ 
                 Hexagon 
                 0.002537 
                 180 
                 0.45666 
                 0.48325 
               
               
                 diameter 
                 Partial 1 (top edge) 
                 0.000578 
                 7 
                 0.004046 
               
               
                   
                 Partial 2 (top right corner) 
                 0.000093 
                 1 
                 0.000093 
               
               
                   
                 Part 3 (right edge) 
                 0.000542 
                 12 
                 0.006504 
               
               
                   
                 Partial 4 (small bottom edge) 
                 0.000014 
                 7 
                 0.000098 
               
               
                   
                 Partial 5 (large bottom edge) 
                 0.001981 
                 8 
                 0.015848 
               
               
                   
                 Partial 6 (bottom right corner) 
                 0.000001 
                 1 
                 0.000001 
               
               
                 ⅛″ 
                 Hexagon 
                 0.010149 
                 56 
                 0.568344 
                 0.660865 
               
               
                 diameter 
                 Partial 1 (top edge) 
                 0.003683 
                 4 
                 0.014732 
               
               
                   
                 Partial 2 (right edge) 
                 0.006256 
                 7 
                 0.043792 
               
               
                   
                 Part 3 (bottom right corner) 
                 0.004041 
                 1 
                 0.004041 
               
               
                   
                 Partial 4 (large bottom edge) 
                 0.006613 
                 4 
                 0.026452 
               
               
                   
                 Partial 5 (small bottom edge) 
                 0.000876 
                 4 
                 0.003504 
               
               
                  1/16″ 
                 Circle 
                 0.003068 
                 121 
                 0.371228 
                 0.407679 
               
               
                 diameter 
                 Partial 2 (right edge) 
                 0.001922 
                 11 
                 0.021142 
               
               
                   
                 Part 3 (bottom right corner) 
                 0.001217 
                 11 
                 0.013387 
               
               
                   
                 Partial 4 (bottom edge) 
                 0.001922 
                 1 
                 0.001922 
               
               
                 ⅛″ 
                 Circle 
                 0.012272 
                 36 
                 0.441792 
                 0.568627 
               
               
                 diameter 
                 Partial 2 (top right corner) 
                 0.00886 
                 6 
                 0.05316 
               
               
                   
                 Part 3 (right edge) 
                 0.010525 
                 6 
                 0.06315 
               
               
                   
                 Partial 4 (bottom edge) 
                 0.010525 
                 1 
                 0.010525 
               
               
                   
               
            
           
         
       
     
     Referring now specifically to  FIGS. 1D, 2D, and 3D , there are shown enlarged top views of the aperture patterns of the attachment devices of  FIGS. 1A, 2A, and 3A , respectively. The plurality of apertures may provide between approximately 0.41 square inches and 0.66 square inches total vented surface area per square inch of the ventilated area, thus the range of net free ventilation that could be achieved by these example embodiments varies between approximately 60 to 95 square feet of total vent area. 
     In some embodiments, each aperture is configured to act as an air inlet which allows cool air to be drawn in to the attic space when in use as a soffit material lining at least a portion of the underside of eaves. The net free ventilation figure is used to calculate how many feet of the vented attachment devices is required to line the underside of eaves based on the calculated Net Free Area (NFA) to achieve a balanced ventilation system for a particular roof system. 
     One advantage of certain embodiments of the attachment device is that there is an increase in the net free ventilation figure achieved by a roof system. 
     One advantage of some embodiments of the vented attachment device  100  is that in addition to being used to secure soffit material to line the underside of eaves, apertures  102   a  enhance the natural flow of air through an attic space, because each aperture  102   a  will also allow cool air to be drawn in through the vented attachment device as a result of hotter air rising and exiting the attic space through the roof. 
     Various example dimensions of the attachment device  100  will now be provided. It will be understood that the following example dimensions may be implemented with any of the embodiments of the attachment device  100  described herein. In some embodiments, a length of the attachment device  100  along an axis parallel to both the attachment surface  110  and the central portion  102  is between approximately 6 inches and approximately 16 feet, or any length therebetween. For example, the length of the attachment device  100  may be between approximately 1 foot and approximately 12 feet, between approximately 2 feet and approximately 8 feet, etc. In some embodiments, the attachment device  100  has a length between approximately 3 feet and approximately 5 feet, for example, approximately 4 feet. 
     In some embodiments, a width of the attachment device  100  along an axis normal to the attachment surface  110  is between approximately 1 inch and approximately 6 inches, or any length therebetween. For example, the width may be any length between approximately 1.5 inches and approximately 4 inches. The flange portions  104   a ,  106   a  may comprise a portion of the width such as, for example, between approximately 0.432 inches and approximately 0.750 inches. The thickness of the attachment surface  110  may further comprise a portion of the width such as, for example, between approximately 0.63 inches and approximately 0.125 inches. The flange portions  104   a ,  106   a  may have the same thickness or may have different relative thicknesses. Each of the flange portions  104   a ,  106   a  may have a thickness such as between approximately 0.125 inches and approximately 0.25 inches. The width of the U-shaped receiving channel  112  (e.g., as measured from an inner surface of flange portion  104   a  to the opposing inner surface of flange portion  106   a ) may be, for example, between approximately 0.281 inches and approximately 0.313 inches. Accordingly, the central portion  102  may have a thickness equal to the sum of the flange thicknesses and the width of the U-shaped receiving channel  112 . For example, an embodiment in which each flange has a thickness of approximately 0.25 inches and the U-shaped receiving channel  112  has a width of approximately 0.313 inches, the central portion  102  may have a thickness of approximately 0.563 inches. 
     The aperture pattern may cover a portion of the width of the attachment device  100 . In one example, the portion of the width covered by the aperture pattern may be between approximately 1 inch and approximately 2 inches, for example, approximately 1.333 inches. The aperture pattern may cover the full length of the attachment device  100 , or may cover a portion of less than the full length. In some embodiments, the aperture pattern may comprise a plurality of subsections of apertures. In one example, a subsection of apertures may have a length between approximately 3 inches and approximately 4 inches, for example, approximately 3.380 inches. The spacing between adjacent apertures may be any suitable spacing such as approximately 0.1 inches, 0.2 inches, 0.25 inches, 0.3 inches, 0.4 inches, 0.5 inches, or more, or any distance therebetween. 
     Generally described and with reference to  FIGS. 4A-5 , example installations of the attachment device  100  of  FIGS. 1A to 1D  will now be described. In the example installation of  FIGS. 4A-5 , a soffit material  150  is seated within the U-shaped receiving channel  112  of the attachment device  100 . In various embodiments, the soffit material  150  may be a solid soffit material, or may include ventilation features integrally formed therein. The soffit material  150  may comprise any suitable soffit material, such as fiber cement, wood, metal, polymeric or composite materials, or any other suitably rigid soffit material. For clarity, certain components normally found in a roof structure, including the roof sheathing, underlayment and shingles, are not shown in  FIG. 4A-5 . Although the attachment devices  100  depicted in  FIGS. 4A-5  are consistent with the attachment device  100  depicted in  FIG. 1A to 1D , it will be appreciated that any of the attachment devices  100  of  FIGS. 1A-3D  may be installed in the same configuration. 
     Turning now to  FIGS. 4A-4B , there is shown a soffit lining system  400  comprising at least two attachment devices  100   a ,  100   b , and soffit material  150 , wherein a first attachment device  100   a  is secured to a structural substrate, for example a wall  155 , and a second attachment device  100   b  is secured to a material such as a sub-fascia  160  or a fascia  165 , such that the U-shaped receiving channels  112  of each attachment device  100   a ,  100   b  are spaced apart and facing each other. Opposing sides of the soffit material  150  are seated within the U-shaped receiving channels  112  such that the soffit material  150  is held securely in position between the attachment devices  100   a ,  100   b  thereby lining the exposed exterior under surfaces of overhanging sections of a roof structure. 
     The attachment surface  110  of each attachment device  100   a ,  100   b  may be secured to the sub-fascia  160  and/or the wall  155  by one or more appropriate fasteners, such as nails, other mechanical fasteners, and/or one or more chemical fasteners such as adhesives. 
     In the example installation of  FIGS. 4A-4B , both attachment devices  100   a ,  100   b  include apertures extending therethrough for ventilation as described herein. However, in some embodiments one or both of the attachment devices  100   a ,  100   b  may not include apertures. For example, in some embodiments such as in the example embodiment illustrated in  FIG. 4C , a single ventilated attachment device  100   b  may provide sufficient ventilation, and a solid non-ventilated attachment device  100   a  may be used. In some embodiments, it may be preferable to place the ventilated attachment device  100  on the eave framing structure to maximise flow of air, laminar or otherwise through the apertures into the attic space. For example, it may be preferable to position the vented attachment device  100  toward the outside edge of the soffit lining system  400  (e.g., adjacent to the sub-fascia  160 ), rather than adjacent to the wall  155 . This positioning may advantageously facilitate natural continuous air flow through the apertures of the example attachment device  100   b  through and out of the attic space. 
     Referring now to  FIG. 5 , a further example installed configuration is illustrated. Similar to the configuration of  FIGS. 4A-4B , attachment devices  100   a ,  100   b  are secured to the building substrate  155  and the sub-fascia  160  to contain a soffit material  150  within the opposing u-shaped receiving channels  112  of the attachment devices  100   a ,  100   b .  FIG. 5  illustrates how one or more rafters  170  and/or one or more additional framing members  175  may further be installed in conjunction with the installed soffit lining system  400 . 
     In practice, when using example embodiment attachment devices  100  and soffit material  150  to cover the exposed exterior under surface of the overhanging section of roof in the soffit lining system  400 , adjacent soffit materials  150  and/or attachment devices  100  may be brought into contact with each other or alternately where a gap is formed, the gap may be covered to seal the exterior under surface. In certain embodiments the gap formed between adjacent components could be sealed using a filler, for example, caulk; using a connector, for example, a PVC or metal H molding; or alternatively using a cover, for example a batten. 
     In various embodiments, the attachment device  100  is formed from an appropriate material as deemed suitable by the person skilled in the art, for example a polymeric material, a suitable composite material, such as for example a fibre glass composite, a suitable metal, such as for example, aluminium. The attachment device  100  could be formed by injection moulding, extrusion or other such forming methods as known to a person skilled in the art. In a further embodiment, an intumescent material could also be included either on one surface or within the attachment device which would activate in the presence of a fire. 
     In a further embodiment, the attachment device could be textured and/or colour matched to the soffit material or surrounding area as desired by the end user. 
     Various wind load calculations have been carried out on the attachment device of the present disclosure. Specifically, the shear load that the lowest flange of the attachment device in situ can withstand when experiencing a downward pressure of 300 lb. per square foot. In such instances it is estimated that the attachment device can withstand a downward pressure of approximately 5479 psi. In a further embodiment, it is possible that the soffit material (e.g., soffit material  150 ) can also be nailed to cross members of an under roof structure to provide additional support and greater wind load resistance. 
     It will of course be understood that the invention is not limited to the specific details described herein, which are given by way of example only, and that various modifications and alterations are possible within the scope of the disclosure as defined in the appended claims. 
     Certain features that are described in this disclosure in the context of separate implementations can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination. Moreover, although features may be described above as acting in certain combinations, one or more features from a claimed combination can, in some cases, be excised from the combination, and the combination may be claimed as any subcombination or variation of any subcombination. 
     Moreover, while methods may be depicted in the drawings or described in the specification in a particular order, such methods need not be performed in the particular order shown or in sequential order, and that all methods need not be performed, to achieve desirable results. Other methods that are not depicted or described can be incorporated in the example methods and processes. For example, one or more additional methods can be performed before, after, simultaneously, or between any of the described methods. Further, the methods may be rearranged or reordered in other implementations. Also, the separation of various system components in the implementations described above should not be understood as requiring such separation in all implementations, and it should be understood that the described components and systems can generally be integrated together in a single product or packaged into multiple products. Additionally, other implementations are within the scope of this disclosure. 
     Conditional language, such as ‘can’, ‘could’, ‘might’, or ‘may’, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include or do not include, certain features, elements, and/or steps. Thus, such conditional language is not generally intended to imply that features, elements, and/or steps are in any way required for one or more embodiments. 
     Conjunctive language, such as the phrase ‘at least one of X, Y, and Z’ unless specifically stated otherwise, is otherwise understood with the context as used in general to convey that an item, term, etc. may be either X, Y or Z. Thus, such conjunctive language is not generally intended to imply that certain embodiments require the presence of at least one of X, at least one of Y, and at least one of Z. 
     Although making and using various embodiments are discussed in detail below, it should be appreciated that the description provides many inventive concepts that may be embodied in a wide variety of contexts. The specific aspects and embodiments discussed herein are merely illustrative of ways to make and use the systems and methods disclosed herein and do not limit the scope of the disclosure. 
     Some embodiments have been described in connection with the accompanying drawings. The figures are drawn to scale, but such scale should not be limiting, since dimensions and proportions other than what are shown are contemplated and are within the scope of the disclosed inventions. Distances, angles, etc. are merely illustrative and do not necessarily bear an exact relationship to actual dimensions and layout of the devices illustrated. Components can be added, removed, and/or rearranged. Further, the disclosure herein of any particular feature, aspect, method, property, characteristic, quality, attribute, element, or the like in connection with various embodiments can be used in all other embodiments set forth herein. Additionally, it will be recognized that any methods described herein may be practised using any device suitable for performing the recited steps. 
     While a number of embodiments and variations thereof have been described in detail, other modifications and methods of using the same will be apparent to those of skill in the art. Accordingly, it should be understood that various applications, modifications, materials, and substitutions can be made of equivalents without departing from the unique and inventive disclosure herein or the scope of the claims.