Patent Publication Number: US-8984829-B1

Title: Modular flooring assemblies

Description:
PRIORITY AND CROSS REFERENCES 
     This application is a continuation of U.S. Non-Provisional patent application Ser. No. 13/399,239 filed 17 Feb. 2012 which is a continuation of U.S. Non-Provisional patent application Ser. No. 12/433,844 filed 30 Apr. 2009, which is now granted U.S. Pat. No. 8,146,319 which is a continuation of U.S. patent application Ser. No. 11/432,873 filed 12 May 2006, which is now granted U.S. Pat. No. 7,543,417, the teachings of each of which are incorporated in their entirety. This application also claims priority to U.S. Provisional Patent Application No. 60/723,578 filed Oct. 4, 2005 and to U.S. Provisional Patent Application No. 60/733,686 filed Nov. 4, 2005. 
    
    
     FIELD OF THE INVENTION 
     The present invention relates to a modular flooring assembly including a flooring component adhered to a tray substrate. 
     BACKGROUND OF THE INVENTION 
     Installing a conventional tile floor is a complicated procedure requiring expertise and craftsmanship. First, the existing flooring may have to be removed. Next, a concrete backer board is attached to the sub floor using permanent fixing means, such as screws or nails. Then, a grout compound is applied to the backer board. Tiles must then be immediately and precisely laid on the grout compound. After the grout on the backer board holding the tiles is hardened, additional grout must be applied between the tiles. This process may require several hours or days of drying time, during which time the floor must not be used. 
     Some previous attempts at modular flooring have not been fully successful. Some prior art modular flooring assemblies do not provide a full supporting structure for the flooring material. This may lead to failure of the flooring assembly as the flooring material may break or bend. Other prior art modular flooring assemblies do not securely hold the flooring material. Some prior art modular flooring systems allow the tiles to shift or migrate resulting in unacceptable performance. 
     SUMMARY OF THE INVENTION 
     The present invention relates to a modular flooring assembly including a flooring component adhered to a tray substrate. The modular flooring assembly may be interconnected with additional modular flooring assemblies to form a modular floor suitable for most flooring applications. The flooring component may comprise tile or wood or other materials commonly used in flooring applications. Convention fill-in grout or a snap-in grout may be used with the modular flooring assemblies. One suitable snap-in grout is a right angle grout member. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  shows a perspective view of the modular flooring assembly. 
         FIG. 2  shows a partial view of the tray. 
         FIG. 3  shows a perspective, partial view of the tray. 
         FIG. 4  shows a perspective, partial view of the top surface of the tray. 
         FIG. 5  shows a perspective view of the flooring component. 
         FIG. 6  shows a close-up view of the upward tab. 
         FIG. 7  shows a close-up view of the downward tab and the upward tab. 
         FIG. 8  shows a perspective view of the right angle grout member. 
         FIG. 9  shows a view another view of the end of the right-angle grout member. 
         FIG. 10  shows a close-up view of the insert. 
         FIG. 11  shows an outside view of the corner of the right-angle grout member. 
         FIG. 12  shows a close-up view of the corner of the right-angle grout member. 
         FIG. 13  shows an inside view of the corner of the right-angle grout member. 
         FIG. 14  shows a partial view of the right-angle grout member attached to the tray. 
         FIG. 15  shows a partial, side view of the right-angle grout member attached to the tray. 
         FIG. 16  shows a modular floor constructed of the modular flooring assemblies. 
         FIG. 17  shows a view of the modular floor with the flooring components removed. 
         FIG. 18  shows a close-up view of the junction of the three modular flooring assemblies. 
         FIG. 19  shows another close-up view of the junction of the three modular flooring assemblies. 
         FIG. 20  shows a perspective view of the bottom of the tray with the padding in place. 
         FIG. 21  shows a perspective view of the bottom of the tray with the padding removed. 
         FIG. 22  shows a perspective view of the padding. 
         FIG. 23  shows a side view of the tray with grout holes. 
         FIG. 24  shows a bottom view of the tray with grout holes. 
         FIG. 25  show a perspective view of the grout for the tray with grout holes. 
         FIG. 26  shows another perspective view of the grout for the tray with grout holes. 
         FIG. 27  shows an end view of the grout for the tray with grout holes. 
         FIG. 28  shows a top view of the grout for the tray with grout holes. 
         FIG. 29  shows a view of the tray substrate with the sloped vertical edges. 
         FIG. 30  shows another view of the tray substrate with the sloped vertical edges. 
         FIG. 31  shows a view of the upwards and the downwards tab of the tray with the sloped vertical edges. 
         FIG. 32  shows another view of the upwards and the downwards tabs of the tray with the sloped vertical edges. 
         FIG. 33  shows another end view of the right-angled member with the curved transition. 
         FIG. 34  shows another view of the flooring component having grooves and depressions. 
         FIG. 35  shows an embodiment of the tray tabs with an upward tab having a convex surface. 
         FIG. 36  shows an embodiment of the tray tabs with a downward tab having a convex surface. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     The present invention relates to a modular flooring assembly including a flooring component adhered to a tray substrate. The modular flooring assembly may be interconnected with additional modular flooring assemblies to form a modular floor suitable for most flooring applications. The flooring component may comprise tile or wood or other materials commonly used in flooring applications. The tray substrate comprises tabs, which provide for the tray substrates to interlock with tabs from an adjacent tray substrate. The fully assembled modular floor provides the appearance of a conventional floor. Fill-in grout or a snap-in grout may be used with the modular flooring assemblies. One suitable snap-in grout is a right angle grout member. The right angle grout member comprises inserts that are received by grout slots formed between the tabs. 
     Importantly, the modular floor may be assembled by individuals, who may lack the training and expertise to install a conventional floor. Also, the modular floor, according to certain embodiments of the present invention utilizing snap-in grout, may be installed without waiting for certain grout products to dry. Also, the modular floor may be quickly disassembled and does not damage the sub floor, as the modular floor is not typically attached to the sub floor by adhesives, grout compounds, or other fastening means. Further, the modular floor may be installed over an existing sub floor without the installation of a concrete backer board, which is commonly used in ceramic tile installation. 
     The tray substrate holds the flooring component on its tray surface. The tray surface is an upward facing horizontal surface with vertical tray edges which protrude upward around the perimeter of the tray surface. 
     The tray surface may be generally flat, or may contain a pattern designed to enhance adhesive performance between the tray surface and the flooring component. The tray surface pattern may be designed to complement the bottom of the flooring component; for example, tiles may have different mold patterns on their bottom depending upon the manufacturer&#39;s design. The tray surface may also be solid, or may have holes therein. The holes may be added in appropriate locations to aid in moisture evaporation without compromising adhesive performance. 
     The vertical tray edges are designed to ensure exact alignment of the flooring component with the tray surface, and provide a barrier to ensure adhesive can be applied over the entire bottom of the flooring component without the adhesive being pushed or flowing into the tab areas. If adhesive is allowed to enter the tab areas, their interlocking connection may be physically impaired by adhesive residue. The vertical tray edges preferably run the entire perimeter of the tray substrate. 
     By their vertical orientation, the tray edges positionally hold the flooring component and, in combination with the adhesive, reduce lateral movement. Importantly, the tray edges provide a further surface for the adhesive to adhere the flooring component. The tray surface joins to the bottom of the flooring component via the adhesive and the tray edges join to the sides of the flooring component via the adhesive. The combination of the adhesive on the tray surface and the adhesive on the tray edges provide a secure hold for the flooring component. This insures that the flooring component is locked down to the tray substrate, and the flooring component does not slip or move. 
     The size of the tray substrate and the flooring component are strictly controlled to insure that the flooring component fits securely in the tray substrate. The flooring component should just fit onto the tray surface and rest snugly against the vertical edges. The flooring component should be slightly smaller than the tray surface defined by the vertical tray edges. 
     The present invention achieves significant advantages. The tray has four vertical tray edges, which improve the structural rigidity of the tray. The four tray edges prevent adhesive from pushing into the interlocking tabs. In other systems, the adhesive can push into the tab area causing interference with the other tile. The four tray edges help align the flooring component to the tray, which improves assembly ease and quality. In other systems, the flooring surface is not constrained and therefore must be held in place until the adhesive has cured. 
     Snap-in grout may be used with the present invention. The snap-in grout is a solid material that fits in between the modular flooring assemblies. A preferred snap-in grout includes the right-angled grout member. The right-angle grout member includes a first leg integrally connected with a second leg at a right angle. Two such right-angle grout members are needed to fit around each modular flooring assembly. The right-angle grout member includes a plurality of inserts that are fitted into slots formed by the tabs. The inserts may have a triangle or arrow-shaped portion that is connected to the right angle grout assembly via a narrower transition region. The triangular-shaped portion may temporarily deform as it is inserted into the slot where it snaps into place. 
     The right-angle grout member provides many advantages. First, only two right-angles grout members are needs to fill in around one modular flooring assembly. This reduces the number of seams between the grout members and improves appearance. Secondly, the right-angle grout member provides a corner that wraps around the corner of the modular flooring assembly. This provides stability to the modular flooring system. Third, the right angle member is easier to install than straight linear strips of grout material since there are less grout pieces to work with. 
     The tabs are on the outside perimeter of the tray substrate. The tabs interlockingly connect the tray substrates. There are upward and downward facing tabs. The upward and downward tabs alternate on each edge of the tray substrate. For most flooring applications, the use of 6, 8, or 10 tabs per edge, half of each orientation, provide satisfactory performance. In other embodiments, there may be fewer or additional tabs. 
     The modular flooring assembly is designed such that even if one or more tabs are broken on a given side, the tray substrates will still interlock. This also allows the modular flooring assemblies to be cut to a specific size and to still interlock. 
     The interlocking tabs may be positioned such that the modular flooring assemblies are offset supporting various decorative patterns. 
     The interlocking tabs on one modular flooring assembly need not be perfectly aligned with the other modular flooring assembly to allow “fine-tuning” of the relative tile position. 
     The bottom of the tray, i.e., opposite of the tray surface, is designed as the foundation of the system. The bottom may include structural webbing to strengthen the tray bottom ensuring the tray surface remains relatively flat. 
     The bottom of the tray may also include an optional non-skid and noise deadening padding of an over-molded, rubber-like material, such as thermoplastic rubber or thermoplastic elastomer. A particularly preferred thermoplastic elastomer is Santoprene SANTOPRENE®. The padding provides a cushion for the flooring system. The padding also provides a non-skid element that prevents the flooring system from sliding on the underlying flooring material. The padding also provides some level of flex in the presence of underlying floor surface imperfections or heavy surface loads. The padding also helps reduce vibration transmission, thus providing a sound-deadening function. 
     As described above, various type of grout may be used in the present invention, including the snap-in grout or a fill-in grout compound that is spread into the gaps between neighboring trays. 
     The snap-in grout includes a snap-in locking mechanism. The snap-in grout is preferably made from thermoplastic elastomer, thermoplastic rubber, or other compressible, pliable, sealing material designed to fit between the tray substrates and provide a dust and moisture barrier. 
     In some embodiments, the snap-in grout fits into slots created by the interlocking tabs. Grout holders on the perimeter of the tray substrate may also be used in receiving the snap-in grout and in forming the slots. 
     In other embodiments, the snap-in grout is designed to fit into grout holes formed in the interlocking tabs. Both the upward and downward tabs have grout holes. When the tabs are interconnected, the grout holes overlap and provide a combined grout hole to receive the snap-in grout. The snap-in grout is locked into place with the snap-in locking mechanism. The snap-in grout may fit into grout holes on each tab, or in every other tab, or in a pre-defined pattern. The grout hole is generally positioned in the middle area of each tab and is designed to accommodate the snap-in grout line. When the upward and downward tabs are aligned, the grout component fits through the hole and then slides into place locking the grout line down and helping to secure the relative position of the tiles. The bottom of the grout hole may have a serrated surface matching to a serrated surface on the grout material. 
     Fill-in grouts may also be used with the trays. Fill-in grouts may be packaged in a powdered or granular form. The user mixes the powder or granules with a liquid to form a plastic material that is spread in between the modular flooring assemblies. Other fill-in grout compounds are packaged in a ready to spread form. The modular flooring assemblies are snapped together, and the fill-in grout material is used to fill the space between the modular flooring assembly. The fill-in grout material must remain semi-flexible once cured since the floor “floats.” The separate grout material must also have good adhesive qualities to ensure the material adheres to the sides of the modular flooring assemblies. 
     Several different combinations of grout and methods of use may utilized with the modular flooring assemblies, including: 
     A snap-in grout, which is received by grout holes on each tab or in grout slots between the tabs. 
     A fill-in grout compound used with tabs having grout holes or forming grout slots. This embodiment provides manufacturing efficiencies since the same tray substrate can be used for both snap-in grouts and fill-in grouts. 
     A fill-in grout compound used with tabs without grout holes. Without the grout holes, the tabs are incrementally stronger—for applications where a fill-in grout compound will be applied, there is no reason to have the grout holes. 
     Snap-in grout with reduced number of grout holes or slots. In this alternative, the tabs with grout slots are reduced. 
     The flooring component may comprise tile, stone, marble, wood, or other conventional flooring materials. The flooring component could be a ceramic or porcelain tile, a natural stone product like marble or granite, or could be a wooden product. 
     The flooring component is adhered to the tray surface and tray edges using a variety of commercially available adhesives. Suitable adhesives for use with the present invention include a two-part epoxy using a methacrylate material. Other urethane adhesives may also be utilized. The specific selection of the adhesive will depend on the nature and properties of the flooring component. The methacrylate adhesive is preferred for ceramic tile. The tray edges define a space to receive the flooring component. 
     The present invention, by using a snap-in grout that is not permanently integrated with the tray, achieves advantages. The consumer may choose from among many different snap-in grout colors. Damaged snap-in grout can be easily replaced. Snap-in grout may also be changed to reflect different decorating tastes. Finally, flexibility is provided to either use snap-in grout or a fill-in grout. 
     The tray may be made using injection molding of a suitable plastic resin. High impact polystyrene is preferred, but other plastic resins including polypropylene and ABS may be used. 
     The padding of the non-skid and noise deadening material may be a thermoplastic rubber, thermoplastic elastomer, or other softer plastic material including Santoprene SANTOPRENE®. The padding is over-molded to the base of the tray. An adhesive is applied between the tray surface and the bottom of the flooring surface. 
     Multiple adhesive materials and application patterns can be used depending upon the combination of plastic resin used for the tray, the flooring material, and the profile of the flooring material. For tile application, adhesive is applied to the ridgelines on the bottom of the tile to maximize contact with the tray surface. Robotics may be used to improve the precision and efficiency of the assembly process. Robotics may also be used to package and palletize the finished products. 
     The modular flooring assemblies of the present invention may be used in 6-inch, 6½-inch, 12-inch, and 13-inch embodiments. The modular flooring assemblies have a square or rectangular shape. The square shaped modular flooring assemblies have four sides of equal length. Other sizes may be used, however these sizes are generally used in the flooring industry. Further, a combination of the 6-inch and 12-inch modular flooring assemblies may be used in combination to provide a unique appearance. The present invention may be further modified to include other combinations of different sized modular flooring assemblies. 
     During use of the present invention, the modular flooring assemblies are snapped together to form an overall flooring surface. The fill-in grout material may be applied between the modular flooring assemblies, or the snap-in grout may be installed. In order to accommodate different rooms of varying sized and shapes, the modular flooring assemblies can be cut using a wet saw if tile or stone is the flooring component or using a table or a circular saw for wooden flooring components. 
     The underlying flooring surface should be free of major surface variations, but need not be in perfect condition. No special floor preparation is required to ensure the tiles are fixed since the interlocking modular flooring assemblies will “float” and flex. The system can be installed directly on top of finished wood, linoleum, other tile, concrete, plywood, or a variety of other flooring systems. The modular flooring assemblies can be installed on top of padding or other underlayment material if an additional measure of insulation or padding is desired. The modular flooring assemblies can be installed on top of radiant-type heating systems as well. 
     The present invention will now be described with reference to the Figures: 
     A first embodiment using a snap-in grout is shown in  FIGS. 1-22 . A modular flooring assembly  10  is shown in  FIG. 1 . The modular flooring assembly  10  includes a tray  100  with a flooring component  600  adhered thereto.  FIGS. 2-4  show a partial view of the tray  100  with the flooring component  600  removed. The tray  100  has a tray surface  110  and a tray bottom  120 . The tray surface  110  receives the flooring component  600 , which in this embodiment is a ceramic tile. 
       FIG. 5  shows the flooring component  600 . A top surface  605  of the flooring component  600  forms the floor surface. A bottom surface  610  of the flooring component  600  is adhered to the tray surface  110  by an adhesive. Although in this embodiment the flooring component  600  is a ceramic tile, the flooring component may be made from any conventional flooring material. 
     Raised edges  160  of the tray surface  110  help secure the flooring component  600  and prevent adhesive from leaking from the tray surface  110 . The raised edges  160  are shorter than the height of the flooring component  600 . Preferably the raised edges  160  completely surround the flooring component  600 . 
     A perimeter of the tray  100  is provided with a plurality of upward tabs  200  and a plurality of downward tabs  300 . The upward tabs  200  interact with downward tabs  300 , and the downward tabs  300  interact with the upward tabs  200  on an adjacent modular flooring assemblies  10 . This provides the interconnection between adjacent modular flooring assemblies  10 . 
     In this embodiment, the tray  100  is provided with a total of eight upward tabs  200  and downward tabs  300  per side of the tray  100 . The tray  100  is designed to form a 12-inch flooring assembly, and more or less tabs may be utilized in larger modular flooring assemblies  10  and smaller modular flooring assemblies  10 . 
     As shown in  FIG. 6 , the upward tab  200  includes a convex protrusion with a flat surface  210  and a valley  220 . As shown in  FIG. 7 , the downward tab  300  includes a concave flat surface  310  and a lip  320 . As the downward tab  300  is urged against the upward tab  200 , the downward tab  300  flexes as the lip  320  slides over the convex flat surface  210  and into the valley  220 , such that the lip  320  snaps into the valley  220  and the concave flat surface  310  presses over the convex flat surface  210 . This provides a connection with sufficient rigidity to create a composite floor made of multiple modular flooring assemblies  10 . 
     Another embodiment as shown in  FIG. 35 , the upward tab  200  includes a convex surface  211  and a valley  220 . As shown in  FIG. 36 , the downward tab  300  includes a concave surface  311  and a lip  320 . As the downward tab  300  is urged against the upward tab  200 , the downward tab  300  flexes as the lip  320  slides over the convex surface  211  and into the valley  220 , such that the lip  320  snaps into the valley  220  and the concave surface  311  presses over the convex surface  211 . This provides a connection with sufficient rigidity to create a composite floor made of multiple modular flooring assemblies  10 . 
     Moreover, the interlocking connection between the downward tab  300  and the upward tab  200  may be separated such that the composite floor may be disassembled. This allows the user to change flooring as desired. Generally, the application of the modular flooring assemblies  10  will not harm the sub floor. 
     A right angle grout member  400  is shown in  FIGS. 8-13 . The grout member  400  includes a first leg  410  and a second leg  420 . The first leg  410  and the second leg  420  are integrally connected at a right angle. Preferably, the grout member  400  is a single piece of material molded into its shape. 
     Turning to  FIG. 9 , a view of one end  405  of the right angle grout member  400  is shown. The right angle grout member  400  includes a central portion  450 . A fluted top  460  is the uppermost portion of the right angle grout member  400 . The fluted top  460  provides a finished appearance to the installed modular floor. The fluted top  460  is complementary to the edges of the flooring component  600 . An angled portion  480  connects to the central region by a narrow portion  470 . The narrow portion  470  and the angled portion  480  form a groove  475 . As the angled portion  480  is pushed into a grout slot  250  (partially shown in  FIG. 7  and fully shown in  FIG. 19 ), it slightly deforms and snaps into place with a top surface  485  of the angled portion  480  physically resting against a bottom surface  275  of the grout holder  270 . This provides a secure connection for the right angle grout member  400  to the modular flooring assembly  10 . 
     Both the first leg  410  and the second leg  420  include a plurality of inserts  430 , which are received by the grout slots  250  formed by the combination of upward tabs  200 , the downward tabs  300 , and the grout holder  270 . As shown in  FIG. 10 , the insert  430  includes an insert ridge  435  that cooperates with a grout holder  270  on the perimeter of the tray  100 . 
     The tray  100  includes a plurality of the grout holders  270 . The grout holders  270  are located between the alternating upwards tabs  200  and the downward tabs  300 . The grout holders  270  generally have an angled shape that widens towards the bottom of tray  120 . 
     The grout holders  270  receive the groove  475  formed by the grout member  400 . The top surface  485  of the angled portion  480  rests against the bottom surface  275  of the grout holder  270 . 
     In this embodiment, the grout holder  270  is separated into two sections by a grout holder separation  280  that receives the insert ridge  435  of the insert  430 . This interaction between the insert ridge  435  and the grout holder separation  280  assists in stabilizing the grout member  400 . This interaction allows the grout member  400  to be attached to the tray  100  before the tray  100  is connected to another tray  100 . The insert ridge  435  and the grout holder separation  280  are optional features. A grout holder of a single component will provide satisfactory performance. 
     As shown in  FIG. 15 , the grout member  400  partially rests on top of the raised edges  160 . Specifically, a rim  490  of the grout member  400  rests on a top edge  165  of the raised edges  160 . Thus, the rim  490  resting on the top edge  165  resists a pulling force created by the top surface  485  urged against the bottom surface  275  of the grout holder. This interaction also provides a positive installation for the grout member  400 . The grout member  400  is prevented from moving in a vertical or a horizontal plane. 
     A corner section  438  of the grout member  400  also interconnects to a corner grout holder  290  (shown in  FIG. 2 ). In this embodiment, the corner grout holder  290  does not have an insert ridge  435 . The corner grout holder assists in aligning the grout member  400 . 
       FIG. 11  shows an outside view of the right angle grout member  400  at the corner section.  FIG. 12  shows a close-up, outside view of the corner section of the right angle grout member  400 .  FIG. 13  shows an inside view of the corner section of the right angle grout member  400 . 
       FIG. 14  shows a view of the right angle grout member  400  connected to the tray  100 . In  FIG. 14 , the flooring component  600  is removed to show the connection between the right angle grout member  400  and the tray  100 . 
       FIG. 15  shows the connection of the right angle grout  400  member to the tray  100 . 
       FIGS. 16-19  show various views of a modular floor  550 .  FIG. 16  shows the modular floor  550  including modular flooring assemblies  10 ( a ),  10 ( b ) and  10 ( c ). In  FIG. 16 , there is no right angle grout member  400  shown installed around flooring component  600 ( a ) in a channel  700 . Modular flooring assembly  10 ( c ) is shown with a flooring component  600 ( c ) and a right angle grout member  400 ( c ). A modular flooring assembly  10 ( b ) is shown with a flooring component  600 ( b ) and a right angle grout member  400 ( b ). 
     In  FIG. 17 , the modular floor  550  is shown with the flooring component  600 ( a ),  600 ( b ), and  600 ( c ) removed. The right angle grout member  400 ( c ) is also removed. 
       FIG. 18  shows a view of the junction of trays  100 ( a ),  100 ( b ), and  100 ( c ). The right angle grout member  400 ( b ) is shown. 
       FIG. 19  is another view of the junction. 
     An optional padding  500  is shown in  FIGS. 20 and 21 . The padding  500  may be over-molded to the tray bottom  120 .  FIG. 21  shows the padding removed. The tray bottom  120  may include a series of channels. This provides a positive connection between the optional padding  500  and the tray bottom  120 . 
       FIGS. 23-28  illustrate an embodiment in which snap-in grout is designed to fit into grout holes formed in the interlocking tabs. A tray  800  is shown in  FIG. 23 . The tray  800  interlocks with other trays  800  to form a modular floor. The tray  800  is shown without a flooring component. The tray  800  includes upward tabs  810  and downward tabs  820 . The upward tabs  810  have grout holes  815 . The downward tabs  820  have grout holes  825 . When the upward tabs  810  and downward tabs  820  are interconnected, the grout holes  815  and the grout holes  825  overlap and provide a combined grout hole to receive a snap-in grout  900 . 
     The snap-in grout  900  is shown in  FIGS. 25-28 . The snap-in grout  900  is locked into place with a slide locking mechanism. The snap-in grout  900  has a plurality of legs  910 . The legs  910  expand into a barb portion  930 . A top surface  931  of the barb portion  930  includes an optional serrated surface  935 . The barb portion  930  is larger in cross-sectional area than the leg  910 . 
     Sides  932  of the barb portion  930  are angled such that the barb portion  930  is pointed, i.e., a bottom surface  933  of the barb portion  930  is smaller than the top surface  931  of the barb portion  930 . This snaps the barb portion into the combined grout hole and helps the barb portion  930  anchor the snap-in grout  900  into the combined grout hole. A bottom of the grout hole  815  has an optional serrated surface  835  matching to the serrated surface  935  on the snap-in grout  900 . 
     The snap in grout  900  includes a grout portion  950  with a channel  960  to receive an additional grout member. The grout portion  950  ends in a point  952  formed by a 90 degree angle. When other grout portions  950  meet at an intersection of four modular flooring assemblies, the points  952  fill the intersection. 
     The periphery of the grout hole  815  includes a lower bracket region  855  and the periphery of the grout hole  825  includes an upper bracket region  865 . The lower bracket region  855  and the upper bracket region  865  extend into the grout hole  815  and the grout hole  825 , respectively. When the upward tabs  810  and downward tabs  820  are interconnected, the lower bracket region  855  and the upper bracket region  865  overlap. This provides a wider region  880  and  885  on either side of the overlapping bracket regions  855  and  865  that receives the barb portion  930 . Then, the user laterally moves snap-in grout  930  until the barb portion  830  is underneath the overlapping lower bracket region  855  and the upper bracket region  865 . Once the barb portion  930  is underneath, it is secured in place. 
     Another tray embodiment of the present invention is shown in  FIGS. 29-32 . A tray  1000  is illustrated with vertical edges  1010  rising from a bottom surface  1005  from the tray  1000 . The vertical edges  1010  extend around the entire perimeter of the tray  1000 . The vertical edges  1010  have a sloped surface  1020 . 
     The sloped surface  1020  angles inward and downward, i.e. toward a middle of the bottom surface  1005 . The sloped surface  1020  provides several advantages. First, the sloped surface  1020  creates an adhesive moat to capture any excess adhesive. When a flooring component is pressed into the tray  1000 , the adhesive has a place to pool, which improves the bond between the flooring component and the tray  1000 , and further reduces the likelihood that the adhesive will spill over the vertical edge  1010  and contaminate the interlocking tabs. The sloped surface  1020 , due to its inward and downward edge, also helps guide the flooring component into the tray  1000  during assembly. 
     The vertical edge  1010  also includes a generally flat upper surface  1030  that transitions into the sloped surface  1020 . The grout member may rest on the upper surface  1030 . 
     In this embodiment, the tray  1000  includes grout holders  1050 . The grout holders  1050  are a solid body without the grout holder separation as shown in some of the other embodiments of the present invention. The grout holder  1050  is positioned between downward tabs  1060  and upward tabs  1070 . 
       FIG. 33  shows another right-angle grout member of the present invention. A right-angle grout member  1100  includes a curved transition  1150 . The curved transition  1150  provides a compressible seal that is forgiving to the edge of the flooring component. The right angle grout member  1100  further includes inserts  1110  that lack the insert ridge  435  of other embodiments of the present invention. The inserts  1110  provide sufficient connectivity between the inserts  1110  and the interlocking trays with reduced manufacturing and production costs. 
       FIG. 34  shows a flooring component  1200  of the present invention. The flooring component  1200  is a ceramic tile having depressions  1205  and grooves  1210  therein. A bottom surface  1220  of the flooring component  1200  is shown. By including the depressions  1205  and the grooves  1210 , the adhesive is provided more surface area to contact the flooring component  1200 . Further, joint starvation is reduced since adhesive is not squeezed away from regions of the bottom surface  1220  of the flooring component  1200 . If the bottom of the flooring component  1200  includes ridges or protrusions, then adhesive may be pushed away in from these areas leading to joint starvation resulting in an inferior bond between the bottom of the flooring component and the surface of the tray. 
     As is evident from the foregoing description, certain aspects of the present invention are not limited by the particular details of the examples illustrated herein, and it is therefore contemplated that other modifications and applications, or equivalents thereof, will occur to those skilled in the art. It is accordingly intended that the claims shall cover all such modifications and applications that do not depart from the spirit and scope of the present invention.