Patent Publication Number: US-2021164239-A1

Title: Systems and methods for tile floor constructions

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to U.S. Provisional Patent Application No. 62/652,391, filed Apr. 4, 2018 and U.S. Provisional Patent Application No. 62/779,816, filed Dec. 14, 2018, both of which are incorporated herein by reference in their entirety. 
    
    
     TECHNICAL FIELD 
     The embodiments disclosed herein relate to tile floor constructions, and more specifically to tile floor constructions for overlaying structures such as but not limited to decks, patios, porches, and interior wooden and concrete floors. 
     BACKGROUND 
     Floors are often finished with a top layer of stone or ceramic tile to give a long lasting and aesthetically pleasing floor construction. Traditionally, finishing a floor with a top layer of stone or ceramic tile required the tiles to be physically bonded to a subfloor by a material such as an adhesive, a mortar and/or grout. These types of tile floor installations provide a rigid connection for the tiles but are inflexible, so the tiles are unable to move in response to expansion and contraction of the structural base. As such, expansion or contraction of the structural base results in cracked tiles and/or cracked mortar. 
     To combat this issue, decoupling membranes have been developed to separate the tile adhesive layer from the structural base. While this approach has been successful for interior applications, it is complicated, expensive, labor intensive, and is not appropriate for exterior applications as the final installation is rigid in nature. 
     Large format (e.g. 2 cm thick) porcelain tiles that are strong enough to be used in floating applications without a rigid substructure have been developed. These tiles are generally stronger, thinner and weigh less than natural stone tiles and traditional cementitious pavers. These large format porcelain tiles have been successfully employed in exterior applications in all climatic regions for floating patio installations on compacted mineral bases, where polymeric sand is often used to fill gaps between tiles, as well as in raised patio and roof top installations on structural bases with adjustable pedestals and rigid spacers to separate the tiles. 
     Thick cementitious pavers are not appropriate for installations that are sensitive to thickness, and as such laying thick pavers over an existing deck can result in a significant increase in overall height of the deck that may be unacceptable. Further, existing wooden decks and concrete or steel subfloors are generally not perfectly flat, and to compound installation challenges, wooden floor structures regularly move and twist as humidity changes seasonally. 
     Accepted interior installation methods cannot easily accommodate these types of climatic changes (especially in freeze prone regions). While rigid pedestals or compacted sand bases do accommodate for floating installations, installing rigid tiles directly onto a wooden, cementitious, or steel subfloor often results in tiles wobbling, chipping and breaking and, in the case of exterior wooden decking, may result in moisture accumulating between the underside of the mineral tiles and the top surface of the deck boards. This can cause rapid deterioration of the wooden subfloor. 
     For wooden subfloors such as an exterior deck, an alternate approach is to remove the wooden subfloor and replace it with a plurality of large rigid grates directly on top of the floor structure, and then laying the mineral tiles overtop of the rigid grates usually made of plastic, fiberglass or metal. This alternate approach adds thickness to the assembly and is also expensive and time consuming. 
     An improved floor construction that permits laying mineral tiles over a wooden, concrete or steel subfloor without suffering the drawbacks mentioned above is therefore desired. 
     SUMMARY 
     According to some embodiments, a flexible support screen configured to support a tile on a top surface of a structure when the flexible support screen is positioned between the top surface of the structure and the tile is described herein. The flexible support screen includes a compressible body having: a top surface having a plurality of upper openings; a bottom surface spaced apart from the top surface, the bottom surface having a plurality of lower openings; and a plurality of channels extending between the top surface and the bottom surface. The plurality of channels are configured to receive a fluid from at least one upper opening of the top surface and direct the fluid through the compressible body to exit through at least one of the lower openings of the bottom surface. The flexible support screen has a variable rate of compression upon receiving a force directed upon either the top surface or the bottom surface of the compressible body. 
     The flexible support screen may further include a bedding layer having a compressible body having a top surface configured to engage a bottom surface of the tile and a bottom surface configured to engage a top surface of the compressible body of the flexible support screen. 
     The bedding layer may have a compressibility that is greater than a compressibility of the compressible body. 
     The bedding layer may include a closed cell foam that is impervious to water. 
     The bedding layer may include perforations to provide for water to pass between the top surface of the bedding layer and the bottom surface of the bedding layer. 
     The bedding layer and the compressible body may be integral with each other. 
     The bedding layer and the compressible body may be attached to each other. 
     The bedding layer and the compressible body may be separate from each other. 
     The compressible body may have a variable rate of compression upon receiving a force directed upon either the top surface of the compressible body or the bottom surface of the compressible body. 
     The compressible body may include serpentine sections extending between the upper openings and the lower openings to define the channels. 
     The channels may be arranged in a regular pattern across the flexible support screen. 
     The channels may be arranged in an irregular pattern across the flexible support screen. 
     The flexible support screen may be configured to provide a gap between a portion of the bottom surface of the compressible body and the top surface of the structure. 
     The flexible support screen may include a plurality of protrusions extending downwardly from the bottom surface of the compressible body to provide the gap. 
     The compressible body may be a sheet made of a resilient elastomeric material that is sufficiently flexible to provide for the sheet to be coiled over a roll core having a diameter of no more than 2″ without the flexible support screen cracking, breaking or creasing. 
     According to some embodiments, a tile spacer for spacing apart adjacent tiles of a tile floor system is described. The tile spacer includes a first side surface for engaging a first tile of the tile floor system and a second side surface opposed to the first side surface, the second side surface for engaging a second tile of the tile floor system, the second tile being adjacent to the first tile. The tile spacer is compressible to absorb movement of the first tile and the second tile towards each other, at least one of the first side surface and the second side surface is coated with an adhesive to adhere the tile spacer to one or more of the first tile and the second tile, and the tile spacer has a height that is less than a height of the adjacent tiles of the tile floor system. 
     The first side surface and the second side surface may both be coated with the adhesive. 
     The tile spacer may include a removable tab covering the at least one of the first side surface and the second side surface that is coated with the adhesive 
     According to some embodiments, a tile floor system is described. The system includes a plurality of tiles; a flexible support screen configured to support a tile on a top surface of a structure when the flexible support screen is positioned between the top surface of the structure and the tile as described herein, and one or more tiles spacers as described herein. 
     These and other features and advantages of the present application will become apparent from the following detailed description taken together with the accompanying drawings. However, it should be understood that the detailed description and the specific examples, while indicating preferred embodiments of the application, are given by way of illustration only, since various changes and modifications within the spirit and scope of the application will become apparent to those skilled in the art from this detailed description. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
       For a better understanding of the various embodiments described herein, and to show more clearly how these various embodiments may be carried into effect, reference will be made, by way of example, to the accompanying drawings which show at least one example embodiment, and which are now described. The drawings are not intended to limit the scope of the teachings described herein. 
         FIG. 1A  is a plan view of a tile floor system covering a wooden deck and a three-step staircase showing a flexible support screen and floating tiles, in accordance with one embodiment; 
         FIG. 1B  is a plan view of another embodiment of a tile floor system covering a raised concrete patio and a three-step staircase showing a flexible support screen and floating tiles; 
         FIG. 1C  shows top and side views of a strong tile 
         FIGS. 2A, 2B, 2C and 2D  are cross sectional views of field tile retention embodiments 
         FIG. 3A  is side view of a support screen; 
         FIG. 3B  is a plan view of another embodiment of a tile floor system covering a raised concrete patio a flexible support screen and floating tiles; 
         FIG. 4A  is a side view of one embodiment of a bedding layer; 
         FIG. 4B  is a plan view of the bedding layer of  FIG. 4A ; 
         FIG. 4C  is a side view of another embodiment of a bedding layer; 
         FIG. 4D  is a plan view of the bedding layer of  FIG. 4C ; 
         FIGS. 5A and 5B  are side and top views, respectively, of one embodiment of a drainage/conformity layer; 
         FIGS. 6A and 6B  are side and top views, respectively, of another embodiment of a drainage/conformity layer; 
         FIGS. 7A and 7B  are side and top views, respectively, of another embodiment of a drainage/conformity layer; 
         FIGS. 8A and 8B  are side and top views, respectively, of another embodiment of a drainage/conformity layer; 
         FIGS. 9A and 9B  are side and top views, respectively, of another embodiment of a drainage/conformity layer; 
         FIGS. 9C and 9D  are side and top views, respectively, of another embodiment of a drainage/conformity layer; 
         FIGS. 9E and 9F  are side and top views, respectively, of another embodiment of a drainage/conformity layer; 
         FIG. 10A  is a side view of a flexible support screen embodiment showing a functional aspect thereof; 
         FIG. 10B  is a side view of another flexible support screen embodiment showing a functional aspect thereof; 
         FIG. 10C  is a side view of a flexible support screen according to one embodiment with three loads thereon showing a functional aspect of the flexible support screen; 
         FIG. 10D  is a side view of a flexible support screen according to one embodiment rolled-up around a small cylindrical tube; 
         FIG. 10E  is side view of a flexible support screen according to one embodiment laid on an uneven wooden support structure supporting heavy floating tiles; 
         FIG. 10F  is side view of a flexible support screen according to one embodiment laid on an uneven wooden support structure supporting heavy floating tiles showing a pedestrian load near an edge of one of the heavy floating tiles; 
         FIG. 11A  is a plan view of a tile floor system covering a wooden deck showing rigid spacers separating the floating tiles, in accordance with one embodiment; 
         FIGS. 11B and 11C  are top and side views, respectively, of one embodiment of a tile separator; 
         FIGS. 11D and 11E  are top and side views, respectively, of one embodiment of a tile separator spring; 
         FIGS. 11F and 11G  are top and side views, respectively, of another embodiment of a tile separator spring; 
         FIG. 11H  is a top view of another embodiment of a tile floor system showing floating tiles laid on a support structure and retained thereon by an edge band and with the floating tiles being separated by adhesive tile separator springs; 
         FIG. 11I  is a cross sectional view of another embodiment of a tile floor system showing floating tiles laid on a support structure and with the floating tiles separated by adhesive tile separator springs; 
         FIG. 11J  shows a cross-sectional view of the tile floor system of  FIG. 11H  showing a step in a process for installing a final tile separator spring; 
         FIG. 12A  is a side profile view of another embodiment of a tile floor system showing floating tiles on top of a flexible support screen with tile spacers and polymeric sand in gaps between adjacent tiles; 
         FIG. 12B  is a side profile view of another embodiment of a tile floor system showing floating tiles on top of a flexible support screen with tile spacers and flexible in gaps between adjacent tiles; 
         FIG. 12C  is a top view of the system described herein showing polymeric sand or flexible grout in a gaps between adjacent tiles; 
         FIG. 13A  is a top view of the system described herein, with small flexible support screen pads inserted to support the tiles; 
         FIG. 13B  is a top view of the system described herein, with long flexible support screen planks inserted to support the tiles 
         FIGS. 13C and 13D  are side and top views, respectively, of a flexible support screen according to one embodiment adhered to an individual floating tile. 
     
    
    
     The skilled person in the art will understand that the drawings, further described below, are for illustration purposes only. The drawings are not intended to limit the scope of the applicant&#39;s teachings in any way. Also, it will be appreciated that for simplicity and clarity of illustration, elements shown in the figures have not necessarily been drawn to scale. For example, the dimensions of some of the elements may be exaggerated relative to other elements for clarity. Further aspects and features of the example embodiments described herein will appear from the following description taken together with the accompanying drawings. 
     DETAILED DESCRIPTION 
     Various systems or methods will be described below to provide an example of each claimed embodiment. No embodiment described below limits any claimed embodiment and any claimed embodiment may cover systems or methods that differ from those described below. The claimed embodiments are not limited to systems or methods having all of the features of any one systems or methods described below or to features common to multiple or all of the systems or methods described below. 
     Herein, systems and methods of tile floor constructions are described. The systems and methods described herein are appropriate for use in both interior and exterior applications. In some specific embodiments, the systems and methods described herein are useful in exterior applications where the tile floor constructions are overlaid on an existing structure, such as but not limited to a deck. 
     Referring now to the drawings,  FIG. 1A  is a top view of a floating tile system  100  that overlays a structure, according to one embodiment. In this embodiment, the structure is a pressure treated deck including a series of deck structure floor joists  6  overlaid by a series of pressure treated deck boards  5 . Pressure treated deck boards  5  may also be composite boards or the like. In this embodiment, floating tile system  100  includes tiles  1  laid on top of a flexible support screen  2  that is laid directly on a top surface of the pressure treated deck boards  5  to cover the top surface of the pressure treated deck boards  5 . The top surface of the embodiment of the flexible support screen  2  shown in  FIG. 1A  may be generally flat (i.e. smooth and even; without marked lumps or indentations) to engage with at least a portion of each tile  1  and may include openings, as described further below, for receiving and directing water through the flexible support screen  2 . Alternatively, in other embodiments, the top surface of the flexible support screen may be substantially flat and may have small (e.g. less than ⅛ inch deep) marked lumps or indentations. The flexible support screen may be a waterproof layer (e.g. non-porous to water). 
     Tiles  1  are can be made from any material (e.g. ceramic tiles) appropriate for outdoor applications and strong enough for floating applications. For instance, tiles  1  may be referred to as strong tiles. Individual strong tiles may vary in size. For example, in some embodiments, tiles may have a tile area in a range of about 0.2 ft 2  to about 32.0 ft 2  and an approximate thickness range of ½ inch to one inch. 
     As further exemplified by  FIG. 1A , tiles  1  are laid on top of a flexible support screen  2  that is placed directly on the top surface of the pressure treated deck boards  5 . As mentioned above, in this embodiment, tiles  1  are floating tiles (i.e. not adhered to flexible support screen  2  by adhesive, cement, mortar or other similar means). Flexible support screen  2  therefore acts similarly to the way that bedding sand acts in a paver stone driveway application and provides a flexible surface that is stable to support the tiles  1  while also absorbing movement of the underlying surface. Gaps  11  are desired between adjoining tiles  1 . These gaps  11  permit the tiles  1  to move slightly horizontally and vertically with respect to each other as weight is applied to individual tiles  1  or as the pressure treated deck boards  5  shift (as is known to occur with pressure treated floor boards over time), without grinding, cracking or chipping adjacent tiles. Gaps  11  can be controlled by appropriate spacers. Gaps  11  may also permit water and/or other liquid that falls onto a top surface of the tiles  1  to drain off the top surface of the tiles  1 . 
     System  100  also includes skirting tiles  3  that are placed around an outer edge of the structure. Skirting tiles  3  extend above pressure treated deck boards  5  to create a horizontal retention for the field of tiles  1 . Skirting tiles  3  are generally made from mineral materials but can also be made of wood, metal, composite, etc. Skirting tiles  3  are coupled (e.g. mounted or hung) on side surfaces of the structure. Skirting tiles  3  retain the floor tiles  1  on the top surface of the structure and inhibit the tiles  1  from falling off the top surface of the structure 
       FIG. 1B  shows a top view of a floating tile system  200  according to another embodiment where the tiles  1  overlay a raised concrete patio  7  in an exterior environment. Herein, the term “raised” refers to any structure above grade that needs lateral support. In the  FIG. 1B , the raised concrete patio  7  replaces the pressure treated deck boards  5  and the deck joists  6  of  FIG. 1A . 
       FIG. 1C  shows top and side views of tiles  1  having a top face  101  and a thickness  102 . In the embodiment shown, each tile has an approximate minimum weight of about 5 lbs/ft 2  and an approximate maximum weight of about 10 lbs/ft 2 . Tiles  1  each have an approximate minimum top face surface area of 0.2 ft 2  and an approximate maximum top face surface area of 32.0 ft 2 . Tiles  1  also each have a maximum length of about 96 inches and a minimum tile thickness of about 7/16 inches. 
     In some installations, tiles  1  have been installed on support points (e.g. pedestals) having, for example, up to 24-inch centers or 12-inch support centers. Tiles  1  installed on these support points will withstand normal pedestrian traffic safely without breaking. 
       FIGS. 2A, 2B, 2C and 2D  show side profile views of various embodiments of edge retaining options for floating tile system  100  and for floating tile system  200  and floating tile system  300  for both exterior and interior applications. The edge retention options shown therein can be made from a wide variety of materials including but not limited to mineral, metals, woods, plastics, composites, etc. The various embodiments are shown in specific applications, but each embodiment can work in each application. 
       FIG. 2A  shows a profile view of one embodiment of the skirting tile  3 . Skirting tile  3  is offset from the pressure treated deck structure rim board  61  by spacer  45  and creates a drainage gap  31  between the pressure treated deck structure rim board  61  and skirting tile  3 . 
       FIG. 2B  depicts a wide transition strip  3   a  that may be utilized in both interior and exterior applications as a retention system. 
       FIG. 2C  depicts a simple angle  3   b  that may be utilized in both interior and exterior applications as a retention system. 
       FIG. 2D  shows system  300  being a floor and wall construction for both interior and exterior applications. In system  300 , wall  3   c  functions as retention system for field tile. 
       FIG. 3A  and  FIG. 3B  show a flexible support screen  2 , according to one embodiment. Generally, flexible support screen  2  may be made of any one or more natural or artificial, flexible materials (e.g. polymers or elastomers) that can be laid on top of a structure to support tiles  1  thereon. Flexible support screen  2  is configured to be compressible (within normal indoor and outdoor environmental conditions) upon receiving a load of sufficient magnitude on its top or bottom surface. For instance, flexible support screen  2  is generally compressible to accommodate to a top surface of the structure upon which it is laid. Flexible support screen  2  is generally formulated to remain resilient and flexible in a wide range of temperatures commonly found in indoor and/or outdoor environments. Flexible support screen  2  may have a gummy (i.e. sticky) texture, such as but not limited to being like rubber. For instance, in some embodiments, flexible support screen  2  may include a butadiene-based rubber material. In other embodiments, flexible support screen  2  may include recycled rubber tires (e.g. a styrene-butadiene copolymer). Due to the “sticky” or gummy nature of some of the embodiments of the flexible support screen  2  described herein, mortar or adhesive are not required to secure the tiles  1  to flexible support screen  2 . In other embodiments, the flexible screen may include a textile material that is produced by matting, condensing and pressing fibers together. In other embodiments, the flexible screen may include natural fibers such as wool or animal fur, or from synthetic fibers. 
       FIG. 3A  shows the side view of one embodiment of the flexible support screen  2 . Flexible support screen  2  may include two distinct layers: a bedding layer  2   a  and a drainage/conformity layer  2   b . The bedding layer  2   a  is generally soft and slightly sticky and is compressible to allow tile  1  to bed itself into bedding layer  2   a  and resist lateral movement. The bedding layer  2   a  can be free draining or waterproof depending on the intended application. To provide for bedding layer to be free draining, bedding layer  2   a  may include perforations or channels to direct water therethrough. 
     The drainage/conformity layer  2   b  is firmer (i.e. has a lower compressibility) than the bedding layer  2   a  to support the tiles thereon above the structure yet is elastic and designed to conform to the structural base of the deck and provide a relatively flat surface for bedding layer  2   a  and tiles  3 . The drainage/conformity layer  2   b  is also designed to provide an air gap between field tiles  1  and the structural base of system  100  and system  200  in order to provide pathways for water in free-draining applications. The bedding layer  2   a  and the drainage/conformity layer  2   b  can be integral with each other, separate layers that are bonded together or installed independently. The bedding layer  2   a  and the drainage/conformity layer  2   b  can be made of the same material or distinct materials. It is desirable that flexible support screen  2  is relatively thin, such as in a range of about 0.100 inches to about 0.500 inches The drainage/conformity layer  2   b  generally is generally rigid enough to receive forces from either above or below (e.g. from the weight of one or more tiles and/or pedestrian traffic) and maintain an ability for a fluid to transfer vertically though the drainage/conformity layer and laterally across the underlying surface (either within the drainage/conformity layer or after the fluid passes through the drainage/conformity layer). 
       FIG. 3B  shows the top view of one embodiment of the flexible support screen  2  being overlaid with field tiles  1  on a concrete porch. Field tiles  1  are separated by gaps  11 . For the field tiles  1  to lay flat, the structural base of system  100  and system  200  and system  300  must also be flat, but these structural bases occasionally have localized areas that are high points as a result of wood cupping or concrete cracks or other issues  7   a  on which tiles  1  might teeter. Flexible support screen  2  is designed to absorb most high points. Occasionally these localized high points are too extreme, in which case, the flexible support screen  2  can be easily cut away  7   b  with a utility knife to alleviate the area of pressure, allowing field tile  1  to lay flat and on plane with other field tiles  1 . 
       FIG. 4A through 4D  depict various embodiments of bedding layer  2   a . It should be noted that bedding layer  2   a  can be made of various materials suitable for the application. Generally, bedding layer  2   a  may be made of natural or artificial, flexible materials (e.g. polymers, elastomers, felts etc.) that can be laid on top of a structure to support tiles  1  thereon. Bedding layer  2   a  is configured to be compressible (within normal indoor and outdoor environmental conditions) upon receiving a load of sufficient magnitude on its top or bottom surface. For instance, bedding layer  2   a  is generally compressible to accommodate to a top surface of the structure upon which it is laid. Bedding layer  2   a  is generally formulated to remain resilient and flexible in a wide range of temperatures commonly found in indoor and/or outdoor environments. Bedding layer  2   a  may have a gummy (i.e. sticky) texture, such as but not limited to being like rubber. For instance, in some embodiments, bedding layer  2   a  may include a natural or artificial felt. In other embodiments, bedding layer  2   a  may include recycled rubber tires (e.g. a styrene-butadiene copolymer). 
     Bedding layers as depicted in  4 A through  4 D may provide conformity and lateral adhesion between the tiles resting on their upper surface and the support layer beneath them. Bedding layers  4 A through  4 D are relatively thin, generally between 0.030 inch and 0.125 inch thick. Bedding layer  2   a  is more compressible than drainage/conformity layer  2   b . Bedding layers  4 A through  4 D are comprised of very soft material, typically with hardness ranging between a minimum of Shore OO Scale  50  to a maximum of Shore A Scale  40 . A further desirable characteristic of the bedding layer material is a coefficient of static friction of at least 0.8 when in contact with the underside of ceramic tile and also with the top of the flexible support screen. This combination of characteristics may result in a good lateral grip between the bedding layer and the tiles above it and also between the bedding layer and the flexible support screen below it, even at the low contact pressures arising from the weight of the tiles themselves. The lateral grip between the tile and the bedding layer and the bedding layer and the flexible support screen may work to enhance the stability of the system. 
       FIGS. 4A and 4B  depict side and top views of one embodiment of the bedding layer  2   a  that is made from closed-cell foam that is impervious to water and is intended for waterproof application 
       FIGS. 4C and 4D  depict side and top views of one embodiment of the bedding layer  2   a  that is also made from closed-cell foam that includes perforations  2 C for free draining applications. 
       FIG. 5A through 9F  depict various embodiments of drainage/conformity layers of the flexible support screen  2 . Each embodiment of drainage/conformity layer described below may be included in a floating tile system described herein to provide a flexible upper surface that is stable to support the tiles  1  and absorb movement of an underlying surface without a corresponding bedding layer  2   a . Alternatively, each drainage/conformity layer described herein may be included in a floating tile system described herein to provide a flexible upper surface that is stable to support the tiles  1  and absorb movement of an underlying surface with a corresponding bedding layer  2   a  positioned on top of the drainage/conformity layer. In some embodiments, the drainage/conformity layers described herein may be integral with a respective bedding layer described herein. In some embodiments, the drainage/conformity layers described herein may be made of a same elastomeric material or materials as a respective bedding layer described herein. In some embodiments, the drainage/conformity layers described herein may be independent and/or separate from a respective bedding layer described herein. 
     It should be noted that the drainage conformity layers described herein can be made of various materials suitable for the application. Generally, drainage conformity layers may be made of natural or artificial, flexible materials (e.g. polymers or elastomers) that can be laid on top of a structure to support tiles  1  thereon. Drainage conformity layers are configured to be compressible (within normal indoor and outdoor environmental conditions) upon receiving a load of sufficient magnitude on its top or bottom surface. For instance, drainage conformity layers are generally compressible to accommodate to a top surface of the structure upon which it is laid. Drainage conformity layers are generally formulated to remain resilient and flexible in a wide range of temperatures commonly found in indoor and/or outdoor environments. Drainage conformity layers may have a gummy (i.e. sticky) texture, such as but not limited to being like rubber. For instance, in some embodiments, drainage conformity layers may include a butadiene-based rubber material. In other embodiments, drainage conformity layers may include recycled rubber tires (e.g. a styrene-butadiene copolymer). 
     It should also be noted that herein, the term “surface”, when referring to the top surface and/or the bottom surface of the drainage/conformity layer, refers to the uppermost or lowermost, respectively, extent of the layer. For instance, the top surface and may not be a continuous surface but rather may be a collection of contact points between the drainage/conformity layer and a structure laid thereupon (e.g. a tile or the bedding layer). 
       FIGS. 5A and 5B  show side and top views, respectively, of one embodiment of a drainage/conformity layer. Drainage/conformity layer  500  includes a sheet portion  501  having a top surface  504  and a bottom surface  505  and channels  502  extending therebetween. Sheet portion  501  may be analogous to bedding layer  2   b  as described in  FIG. 4B . Channels  502  specifically extend between one of a plurality of openings in the top surface  504  and one of a plurality of openings in the bottom surface  505 . Channels  502  are shown as each being defined by a sidewall that extends vertically between the top surface  504  and the bottom surface  505 . Channels  502  are also shown as having a circular shape and as being arranged in a regular pattern (i.e. having about equidistant spacing between adjacent channels) throughout the drainage layer  500 , but openings  502  may have any shape and may be irregularly arranged (i.e. having variable spacing between adjacent channels) through drainage/conformity layer  500 . Channels  502  are shown as being perpendicular to top surface  504  and bottom surface  505  of the sheet portion  501  (i.e. each sidewall is perpendicular to top surface  504 ), but channels  502  may have any shape as they extend between the top surface  504  and the bottom surface  505 . Channels  502  generally have a diameter to provide for water to freely pass from the top surface  504  to the bottom surface  505 . 
     Drainage/conformity layer  500  also includes protrusions  503  extending downwardly from sheet portion  501 . Protrusions  503  support the bottom surface  505  of the layer  500  above a top surface of the structure when the layer  500  is placed on top of the structure. Protrusions  503  are shown as having a same diameter and being arranged in a regular pattern across the bottom surface  505  of the drainage/conformity layer  500 , but protrusions  503  may be irregularly arranged across the bottom surface  505 . 
     Protrusions  503  may have a conical shape that provides for protrusions  503  to act as individual variable rate springs. For instance, when a load is applied to the drainage/conformity layer  500 , individual protrusions  503  may compress to absorb the load and inhibit deflection of the top surface  504  in areas other than directly beneath the load. Further, when water passes through the openings  502  as described above, protrusions  503  support the bottom surface  505  at a position above the top surface of the structure such that the water may pass out of the bottom surface  505  and travel in any direction along the top surface of the structure. 
     Further, protrusions  503  may provide for the drainage/conformity layer  500  to deform slightly and maintain a planar top surface  504  if the structure below the drainage/conformity layer  500  shifts. For instance, if the structure below the drainage/conformity layer  500  shifts upwardly slightly (e.g. by a distance less than about ⅓ of the natural thickness of the drainage/conformity layer  500 ), individual protrusions  503  may compress to absorb the upward movement of the structure without shifting the top surface  504  or any tiles thereon. Further, when the drainage/conformity layer  500  is compressed, if the structure below the drainage/conformity layer  500  shifts downwardly slightly (e.g. by a distance less than about ⅓ of the thickness of the drainage/conformity layer  500 ), individual protrusions  503  may decompress to accommodate for the downward movement of the surface and maintain conformance of the drainage/conformity layer  500  without shifting the top surface  504  or any tiles thereon. 
     In some embodiments, protrusions  503  and sheet portion  501  may be made of different elastomeric materials that are bonded together. In other embodiments, protrusions  503  and sheet portion  501  may be made of a same elastomeric material and integral with each other. 
       FIGS. 6A and 6B  show a side and top views, respectively, of another embodiment of a drainage/conformity layer  600  in which a top sheet portion  601  has channels  602  extending therethrough and protrusions  603 ,  604  and  605  extend downwardly from a bottom surface  606  of the top sheet portion  601 . 
     In this embodiment, protrusions  603 ,  604  and  605  are each dimensioned to contribute to drainage/conformity layer  600  acting as a variable rate spring (i.e. resistance of the drainage/conformity layer  600  to compression varies during compression). For instance, protrusions  605  are relatively larger (e.g. have a greater diameter and/or height) than protrusions  604 , and protrusions  604  are relatively larger (e.g. have a greater diameter and/or height) than protrusions  603 . 
     As shown, protrusions  603 ,  604  and  605  are dispersed across bottom surface  606  so that there are fewer large-size protrusions  605  than medium-size protrusions  604  and fewer medium-size protrusions  604  than small-size protrusions  603 . Protrusions  603 ,  604  and  605  can be arranged in a regular pattern across bottom surface  606  or can be randomly arranged across bottom surface  606 . When protrusions  605  have a greater height than protrusions  604  and protrusions  604  have a greater height than protrusions  603 , when a tile is placed on top of the drainage/conformity layer  600 , the protrusions  605  contacting the upper surface of the structure will compress slightly and distribute the weight of the tile over the protrusions  605 . As weight is added to the tile (e.g. as a person steps on the tile), the protrusions  605  compress further, the bottom surface of the drainage/conformity layer  600  moves closer to the top surface of the structure and the protrusions  604  begin to contact the top surface of the structure and absorb some of the added weight. Accordingly, the resistance of the drainage/conformity layer  600  increases. As further weight is added to the top surface of the drainage/conformity layer  600 , the protrusions  604  and  605  compress further, the bottom surface of the drainage/conformity layer  600  moves even closer to the top surface of the structure and the protrusions  603  begin to contact the top surface of the structure and absorb some of the additional weight. Accordingly, the resistance of the drainage/conformity layer  600  increases again. In this way, the drainage/conformity layer  600  will have the ability to deflect a considerable amount initially and become relatively stiff quickly. As a result, drainage/conformity layer  600  may accommodate to uneven structural surfaces and pedestrian traffic forces, for example. 
     Further, protrusions  603 ,  604  and  605  may provide for the drainage/conformity layer  600  to maintain a flat top surface if the structure below the drainage/conformity layer  600  shifts or moves. For instance, if the structure below the drainage/conformity layer  600  shifts upward, individual protrusions  603 ,  604  and  605  may compress to absorb the upward movement of the structure without shifting the top surface or any tiles thereon. Further, when the drainage/conformity layer  600  is compressed, if the structure below the drainage/conformity layer  600  shifts downwardly, individual protrusions  603 ,  604  and  605  may decompress to maintain a planar position of the top surface  504  and any tiles thereon. 
     As noted above with reference to  FIGS. 5A and 5B , water (or other liquids) may pass through the channels  602 , out of the bottom surface  606  and travel in any direction along the top surface of the structure. 
       FIGS. 7A and 7B  show side and top views, respectively, of another embodiment of a drainage/conformity layer  700 , in which the drainage/conformity layer  700  is constructed from elastomeric strands  701  woven into planar sheet having a top surface  703  having upper openings, a bottom surface  704  having lower openings and channels  702  extending between the top surface  703  and a bottom surface  704 . Channels  702  generally have a path length that is greater than a thickness of the drainage/conformity layer  700 . In some embodiments, the elastomeric strands are separated by a distance in a range of about 0.1 mm to about 100 mm. 
     When water is placed on top surface  703  it proceeds to pass through the upper openings, fall through the channels  702  and exit the drainage/conformity layer  700  via the lower openings onto a top surface of the structure underlying the drainage/conformity layer  700 . As water lands on the top surface of the structure, it is free to travel in any direction along the top surface of the structure as at least some of the lower openings are spaced apart from the top surface of the structure (i.e. bottom surface  704  is discontinuous (e.g. portions of the bottom surface  704  are spaced from the top surface of the structure)). As a force is applied to the top surface  703  by the weight of a tile or pedestrian traffic, the channels  702  provide for the drainage/conformity layer  700  to compress, the elastomeric strands  701  meet one another and form a flexible yet pervious structure. Further, drainage/conformity layer  700  can provide for the tiles to remain in a planer orientation as the structure below the drainage/conformity layer  700  shifts and moves. 
     The size and durometer of strands  701  coupled with the size and frequency of air channels  702  combine to create a bed for tiles  1  while accommodating uneven structural surfaces and pedestrian traffic forces. 
     Further, drainage/conformity layer  700  may also accommodate to a shifting lower structure below the drainage/conformity layer  700 . For instance, if the structure below the drainage/conformity layer  700  shifts upwardly, portions of the drainage/conformity layer  700  may compress to absorb the upward movement of the structure without shifting the top surface or any tiles thereon. Further, when the drainage/conformity layer  700  is compressed, if the structure below the drainage/conformity layer  700  shifts downwardly, portions of the drainage/conformity layer  700  may decompress to maintain a planar position of the top surface and any tiles thereon. 
       FIGS. 8A and 8B  show side and top views, respectively, of another embodiment of a drainage/conformity layer  800 . In this embodiment, drainage/conformity layer  800  is constructed of elastomeric ribbons including straight sections of elastomeric ribbons  802  and connected serpentine (i.e. move or lie in a winding path or line) sections of elastomeric ribbon  801 . Straight sections of elastomeric ribbons  802  and connected serpentine sections of elastomeric ribbon  801  are arranged in a regular pattern to form channels  803  therein that provide for the passage of water through the layer  800 . Channels  803  are generally perpendicular to the top surface of the drainage/conformity layer  800 .  FIG. 8B  shows the channels  803  created by the arrangement of the straight sections of elastomeric ribbons  802  and connected serpentine sections of elastomeric ribbon  801 . In some embodiments, the channels  803  have a width in a range of about 1 mm to about 100 mm. 
     As per  FIG. 8A , straight sections  802  are slightly taller than connected serpentine sections  801  and thereby create channels  804  on the bottom of drainage/conformity layer  800 . Water that passes through channels  804  is free to escape in the direction parallel to straight sections  802 . Straight sections  802  should therefore be oriented in a direction parallel to a direction of desired water drainage. 
     In some embodiments, serpentine sections  801  are structurally stronger than straight sections  802  when receiving forces from weight of the tiles and/or pedestrian traffic. Regions where the straight sections  802  and serpentine section  801  connect may be even stronger. The parts of straight sections  802  at the top and bottom of the drainage/conformity layer  800  which make up channels  804  and  805  are unsupported and easily deflect to create a bed for tiles  1  while accommodating uneven structural surfaces and pedestrian traffic forces as outlined in  FIGS. 10E and 10F . 
       FIGS. 9A and 9B  show side and top views, respectively, of an embodiment of drainage/conformity layer  900  in which drainage/conformity layer  900  is constructed of elastomeric ribbons in the form of straight sections  901  and connected serpentine sections  902 . In a manner similar to  FIG. 8A , straight sections  901  are slightly shorter than connected serpentine sections  902  and thereby create channels  904  on the bottom of drainage/conformity layer  900 . Water that passes through channels  903  is free to pass through the channels  904  in a direction parallel to straight sections  901 . For this reason, the straight sections  901  of drainage/conformity layer  900  are oriented in a direction perpendicular to a direction of desired water drainage. 
     Again, serpentine sections  902  are structurally stronger than straight sections  901  in the direction of forces from tile weight and pedestrian traffic. Connected areas of straight section  901  and serpentine section  902  are stronger still. The parts of serpentine sections  902  at the top and bottom of the screen which make up channels  904  and  905  are unsupported and easily deflect to create a bed for tiles  1  while accommodating uneven structural surfaces and pedestrian traffic forces. 
       FIGS. 9C and 9D  show side and top views, respectively, of another embodiment of a drainage/conformity layer  1000  in which drainage/conformity layer  1000  is constructed of elastomeric rods in the form of a top layer  1001  and a bottom layer  1002 . The elastomeric rods in each layer  1001 ,  1002  can have any shape and are shown as being round. Individual rods forming top layer  1001  are connected with individual rods forming bottom layer  1002  at connection points  1004  to form drainage holes  1003  therebetween. As shown, each of the individual rods of top layer  1001  can be arranged to be parallel with each of the other individual rods of top layer  1001  and each of the individual rods of bottom layer  1002  can be arranged to be parallel with each of the other individual rods of bottom layer  1002 . Each of the individual rods of top layer  1001  can be perpendicular to each of the individual rods of bottom layer  1002  (as shown) or each of the individual rods of top layer  1001  can be arranged at any other practical angle relative to each of the individual rods of bottom layer  1002 . The rods of the top layer  1001  and the bottom layer  1002  can be the same durometer or can be different durometers so that in combination they may work as a variable rate cushion or spring (as described above). In some embodiments, the drainage/conformity layer  1000  should be installed so that drainage off an underlying structure is in a direction that is parallel to the direction of the individual rods of the bottom layer  1002 . 
       FIGS. 9E and 9F  show side and top views, respectively, of another embodiment of a conformity/drainage layer  1100  in which conformity/drainage layer  1100  is constructed of a rigid corrugated screen  1101  made from plastic or metal. To stiffen the corrugations, a strong top sheet  1102  may be connected at the apex of the corrugations  1103 . Top sheet  1102  is made from a free draining material such a landscape cloth, screening or the like. Water is free to pass through the top sheet  1102  and through openings  1104  in corrugated screen  1101 . The conformity/drainage layer  1100  provides significant support in a wide area and is also easily deformable in localized area to alleviate pressure points. 
     Referring now to  FIGS. 10A to 10F , although reference will be made to flexible support screen  2 , it should be noted that the flexible support screen  2  may be a composite of a bedding layer  2   a  and conformity/drainage layer  2   b  as discussed herein and that the functional aspects may be common to all the potential flexible support screens embodiments described herein. 
     Flexible support screen  2  may be secured to an underlying structure by means of fasteners that may include ordinary staples or other suitable fasteners. Alternatively, flexible support screen  2  may be unsecured. Tiles  1  are laid over a top surface of the flexible support screen  2  and may be held in place by virtue of the weight of tiles  1  and the close abutting relationship between adjacent tiles  1 . 
       FIG. 10A through 10F  describe some features of support screen  2 . 
       FIG. 10A  shows that support screen  2  is pervious to water when bedding layer  2   a  is pervious to water as described in  FIGS. 4C and 4D . Water droplets  22  pass through support screen  2  relatively uninterrupted. 
       FIG. 10B  shows that support screen  2  is impervious to water when bedding layer  2   a  is impervious to water as described in  FIGS. 4A and 4B . Water droplets  22  ride on the top of support screen  2  and drip off the edges of support screen  22 . 
       FIG. 10C  represents schematically the desirable progressive (i.e. variable) rate response of the flexible support screen  2  to loads directed downwardly on it by tiles placed thereon. G 1  represents the 0.07 psi pressure resulting from the approximate load of the tiles alone. G 2  represents 7 psi pressure resulting from a 100 lb person totally supported by a 1 ft2 tile. G 3  represents 21 psi pressure resulting from a 300 lb person totally supported by a 1 ft2 tile. The deflections resulting from G 1 , G 2  and G 3  are respectively V, 2V and 3V, demonstrating such a progressive rate response. The low initial rate allows compliance to small vertical irregularities of the support structure and the progressive rate inhibits excessive deflection from live loading by people. 
     Flexible support screen  2  may be secured to their underlying structure by means of fasteners that may include ordinary staples or other suitable fasteners or it can be left to float with no fastening mechanism. Tiles  1  are laid over top of the flexible support screen  2  and held in place by virtue of the weight of tiles  1  and the close abutting relationship between adjacent tiles  1 . 
     In some embodiments, as noted above, flexible support screen  2  may have a thickness in a range of about 0.188 inches and 0.500 inches. It should be noted that as the thickness of flexible support screen  2  increases, it may be easier to achieve some of the functional requirements noted herein (e.g. directing water and deflecting loads), however, thin screens are desired in instances where there are thickness restrictions for the tile floor system. 
     As shown in  FIG. 10D , flexible support screen  2  is made of a material that is sufficiently elastic to provide for the flexible support screen  2  to be rolled up into large rolls for easy transportation (e.g. about 3-6 feet wide) without the flexible support screen  2  cracking, creasing or breaking. 
     As shown in  FIG. 10E , flexible support screen  2  is also sufficiently elastic to conform under the weight of the floating tiles  1  to accommodate an uneven structural base  6  to create a flat top surface on which to install the floating tiles  1 . In this manner, flexible support screen  2  may function analogously to un-set tile adhesive (e.g. mortar or mud) or bedding sand. Specifically,  FIG. 10E  shows a flat pressure treated deck board  5   a  connected to a wooden floor joist  6 , an upwardly cupped pressure treated deck board  5   b  connected to a wooden floor joist  6  and a downwardly cupped pressure treated deck board  5   c  connected to a wooden floor joist  6 . Flexible support screen  2  is sufficiently elastic to conform under the weight of the floating tiles  1  to accommodate an uneven structural base  6  created by flat pressure treated deck board  5   a , upwardly cupped pressure treated deck board  5   b  and downwardly cupped pressure treated deck board  5   c  to create a relatively planar top surface on which to lay the floating tiles  1 . 
       FIG. 10E  shows one unique situation using the full capability of the support screen  2  to comply with vertical irregularities of the support system. A first deck board  5   a  is shown with a substantially flat cross-section. A second deck board  5   b  is shown with a localized upward cup of about 0.060 inch maximum extent. A third deck board  5   c  is shown with a localized downward cup of about 0.060 inch maximum extent. The situation creating a high point on the wooden or concrete structural base can be varied (cupping, warping, cracking, heaving etc.). It is desirable to choose a support screen material and configuration to result in an initial compressive spring rate permitting the depicted deflection under the static loading of the supported tiles. It is important to note that the contemplated high points are limited to a small localized areas. By way of example 0.25″ thick support screen might conform, under the static weight of the supported tiles, to a maximum 0.060 inch upward or downward cupping of the underlying support decking in a small localized area. If a localized high point exceeds 0.060 inch, or if the high point affects a larger area, then the flexible support screen  2  can simply be cut away to alleviate pressure as shown in  FIG. 3B . Field tiles  1  are strong enough to span the gaps resulting from such trimming and therefore the system is able to absorb localized high points extending up to the thickness of the support screen  2 . 
       FIG. 10F  shows how the flexible support screen  2  may work as a variable rate spring and deflect slightly under the increased and variable load G 4  of pedestrian traffic. The floating tiles  1  may move downwardly and then back to a neutral position when the variable load G 4  of pedestrian traffic is applied and removed, however, the total movement of the tiles  1  is minimal because the flexible support screen  2  becomes increasingly rigid as the load G 4  is applied. Support screen  2  works such that the movement of tile  1  is small enough that it is not perceptible to the average person walking on the surface of the tiles  1 . 
     The systems described herein may further include one or more tile spacers positioned between one or more adjacent tiles to separate adjacent tiles and to inhibit movement (e.g. vertical and/or lateral movement) of the one or more adjacent tiles after being installed and during use. 
     The tiles spacers described herein are generally for use in systems such as those described herein and are generally retained indefinitely between tiles after installation. This is in contrast to conventional tile spacers that are used primarily to provide consistent spacing between adjacent tiles after tiles are placed on a wet tile adhesive layer and are subsequently removed from the spacing between the tiles after the wet tile adhesive layer has set and before the grout is installed. In this fashion, the tile adhesive layer beneath the tiles inhibits movement of the tiles after the tiles are installed and before the grout has been installed. 
       FIG. 11A  shows system  100 , being a pressure treated deck covered with tiles  1  retained by skirting  2 . Tiles  1  are floating on support screen  2  which is supported by pressure treated deck boards that are connected to a pressure treated deck frame. The tiles are separated by gaps  11 . The gaps have been established by spacer  20  of  FIGS. 11B and 11C . 
       FIGS. 11B and 11C  show a top view and a front view, respectively, of a conventional tile spacer  20  of a conventional tile and grout systems. Conventional Spacers  20  are generally made of hard plastic materials. Spacers  20  may be placed between adjacent tiles such that spacer legs  22  establish a gap  11  between adjacent tiles  1  along their respective edges  102 . In some embodiments, tile spacer  20  has a thickness X and the spacer leg  22  has a height H that may be lower than a thickness of the tiles  1 . In conventional adhesive/grout applications, spacers  20  are removed before grouting. Conventional tile spacers  20  will not work well in the systems described herein as they are shaped to be removed from existing tile systems prior to grouting. Further, conventional tile spacers  20  are generally made of hard (e.g. non-compressible) plastic materials that will not work well in the systems described herein (no matter what the shape) as the slight but constant vertical movement of floating tiles  1  sitting on a flexible base will push conventional tile spacers  20  or any other hard spacer out of gap  11 . 
       FIGS. 11B, 11C, 11D and 11E  represent embodiments that work well in the system herein as defined. 
       FIGS. 11D and 11E  show a top view and a front view, respectively, of another embodiment of a tile spacer  25 . Tile spacer  25  is a much simpler shape than spacer  20 . Spacer  25  is flexible and compressible and generally unaffected by (e.g. does not easily degrade in response to) seasonal temperature changes. In some embodiments, spacer  25  may be made of a similar material as some or all the flexible support screen  2 . Spacer  25  has a thickness X that establishes a width of the gap (e.g. gap  11 ) between tiles. In some embodiments, thickness X of spacer  25  is often about 1/32″ to about 3/32″, although it can be up to about ⅜″ wide or in some applications more than 2 inches wide. Spacer  25  has a height H that may be about ½ the height of the tiles  1 , in some examples. The flexibility of spacer  25  allows tighter and looser installations which require less than perfection in the squareness and dimensions of the tiles. As a result, the system can easily employ standard industry tile cutting tolerances. 
       FIGS. 11F and 11G  show top and front views of a spacer  26  that is also flexible and compressible. Again, spacer  26  is impervious to seasonal temperature changes and may be made of a similar material as the flexible support screens described herein. Spacer  26  has a thickness X that establishes the gap (e.g. gap  11 ) between tiles. Spacer  26  also includes ribbing that may act as a variable rate spring when compressed by tile face  1   c  of tile  1   b  when the gap  11  is closed between tile  1   a  and tile  1   b . Ribbing refers to tile spacer  26  having portions  26   a  that are thicker than portions  26   b  of the spacer  26 . Ribbing of spacer  26  provides for spacer  26  to have a variable resistance to compression during compression. For example, during compression, portions  26   a  initially compress. When portions  26   a  are compressed to a thickness equal to the thickness of portions  26   b , the resistance of the spacer  26  to compression increases dramatically. Again, spacer  26  may have a height that is less than a height of the tiles  1   a.    
     To further enhance the performance of spacers  25  and spacer  26  and to overcome the problem of spacers working out of gap  11 , spacer  25  and spacer  26  may include an adhesive (e.g. VHB™ adhesive, an acrylic adhesive, an epoxy-based adhesive, or the like) on one or more faces of the spacer  25  or  26  that determine gap  11  between tiles  1 . The adhesive, when positioned on opposed faces of spacer  25  or spacer  26 , serves to physically connect adjacent tiles  1 . Any adhesive that is impervious (i.e. resistant) to weather conditions and temperature fluctuations of seasonal changes may be used. Further, the adhesive may be factory applied to the spacers or may be applied by a user (e.g. during installation). In one specific embodiment, the adhesive may be applied to one or more faces of the spacer and be protected prior to and during assembly by one or more removable tabs. Also, the adhesive could be formed as a puck that can be dispensed by a dispensing tool directly onto an edge of tiles of the system  100 . As in the case of conformance/drainage layer  2   b , there are many potential embodiments of spacers that can be included in system  100   
     In some embodiments of the system  100 , an adhesive may be used to connect adjacent tiles together without the use of a tile spacer such as spacer  25  or spacer  26 . 
       FIG. 11H  shows a top view of a floor construction (e.g. floor assembly  100  of  FIG. 1A ). During system  100  assembly, a flexible support screen as described herein is placed on top of the support structure and tiles  1  are arranged on top of said flexible support screen. As tiles  1  are installed, tile spacers  25  or spacers  26  having adhesive are placed between tiles  1  to form the required gap  11  between the tiles. During assembly, an installer installs at least one spacer  25  or one spacer  26  on each side of each tile and uses a block to tap the tile  1  into position. Ashlar patterns (as shown) are notoriously difficult because of the very accurate tile cutting required. Spacer  25  and spacer  26  provide the system with dimensional and physical flexibility for quick and efficient installation. 
       FIG. 11I  is a side view of system  100  with spacers  26  installed with adhesive. Support screen is able to deflect slightly under the increased and variable load G 4  of pedestrian traffic. Spacers  26  with adhesive on one mounting face will remain in gap  11  as floating tiles  1  move up/down during service. Spacers  26  with adhesive on both mounting faces will also stay in gap  11 , and as an added benefit will work to absorb force G 4  and spread it onto adjacent tiles  1 , and in turn minimizing the up/down movement of said tiles  1 . In this way the entire field of tiles  1  becomes a flexible lattice network and significantly more rigid than floating tiles alone. The presence of tile spacers such as spacers  26  may provide for bending flexure between adjacent tiles rather than vertical slippage between tiles. As such, the spacers  26  act in shear to cause adjacent tiles to share in resisting loads G 4 . This shear force transmission results in an effective hinge action at tile joints which inhibits perceptible tile to tile height differences across gaps. The systems described herein are flexible enough to deal with minor movement within the structure, yet rigid enough to perform well in the intended application. 
       FIG. 11J  shows a side profile view of a floor construction  100  with a simple pry bar  29  being employed to install the final spacers  25   a  positioned at an edge of the system  100 . Final spacers  25   a  of the system  100  may not be coated with adhesive and may be installed in various thicknesses and at various locations dependent on the needs of the specific installation. Generally final spacers  25   a  will be installed near an edge of the systems described herein in low traffic areas, however, final spacers  25   a  may also be installed at other positions within the system. During assembly, the tiles  1  positioned at the edge of the system  100  may be cut to size in order to fit properly. Usually the tiles positioned at an edge of the system  100  should be cut at a dimension so that edge gap  17  is similar to (but slightly smaller than) gaps  11  in the rest of the installation. In this installation, tool  29  is used to gently pry open the edge gap  17  between tile  1  and coping tile  3  by compressing spacers  25  or spacers  26  in adjacent gap  11 , to create an edge gap  17  having a width that is a little bit larger than dimension x of spacer  25   a  in order to comfortably slide spacer  25   a  into edge gap  17  between the tile  1  and coping tile  3 . As a final step, the simple pry bar  29  is removed, the tile  1  slides towards the coping tile  3  and the flexible and compressible spacers  25   a  become the final key in locking the tile field together. It will be understood that the pry bar depicted is merely explanatory of the general direction and size of assembly force used and could be provided by a similar tool especially adapted for the purpose. 
       FIG. 12A through 12C  depict polymeric sand  41  or flexible grout  42  installed in gaps  11 . In some installations and particularly as gap  11  increases in width, installers of the system described herein may wish to fill the gaps  11  for a more conventional tile floor installation appearance. A width of gap  11  is defined by a tile spacer  25  or spacer  26  positioned in the gap  11  between adjacent tiles  1 . Tile spacer  25  or spacer  26  abuts a side portion of each of the tiles  1  and is resilient to inhibit horizontal movement of the tiles  1  towards and away from each other. Flexible support screen  2  is below tiles  1 , above the structure and extending across and beneath the gap  11 . Polymeric sand  41  and flexible grout  42  can be installed directly on top of support screen  2  and spacers  25  or spacers  26  without negative consequence to the system described herein. Unlike conventional tile floor installations, in the system described herein, grouting can be installed immediately after field tiles  1  are in place and without waiting overnight for conventional tile adhesive to set. 
       FIG. 12A  is a cross sectional view that depicts system  100  with polymeric sand  41  installed in gaps  11 . 
       FIG. 12B  is a cross sectional view that depicts system  200  or system  300  with flexible grout  42  installed in gaps  11 . 
       FIG. 12C  is a top view of the systems described herein with polymeric sand  41  or flexible grout  42  in gaps  11 . 
     When gaps  11  are narrow and the installer determines that polymeric sand or flexible grout will not be utilized in the installation of the system described herein, the installer may utilize discontinuous pieces of support screen  2  as depicted by  FIGS. 13A through 13C  below. As shown, the flexible support screen  2  is generally arranged to be placed underneath either at an edge, a corner or a center of each of the floating tiles  1 . More than one floating tile  1  may be placed on each flexible support screen  2 . The use of a plurality of flexible support screens  2  strategically placed underneath portions of the tiles  1  will reduce the amount of flexible support screen material when compared to the use of a continuous flexible support screen that extends across the entire tops surface of the underlying structure. The location of each flexible support screen  2  can be individually selected by the installer to accommodate a desired installation plane for the tiles. In some embodiments, the flexible support screens  2  can be placed at a distance of about 12 inches measured center-to-center from an adjacent flexible support screen  2  to support the tiles  1 . 
       FIG. 13A  is a top view of the system described herein with support screen  2  being discontinuous and shown as small pads  2   r.    
       FIG. 13B  is a top view of the system described herein with support screen  2  being discontinuous and shown as strips  2   s.    
       FIGS. 13C and 13D  show a side and top views, respectively, of an embodiment flexible support screen  2   t . Herein, flexible support screen  2   t  is shown as being adhered to an individual floating tile  1 . Specifically, flexible support screen  2   t  is adhered to a bottom surface of the tile  2  using an adhesive. 
     The following represents a sequence of installation for system described herein, according to one embodiment.
         a. Inspect structural base for integrity, flatness, squareness, etc. and make required adjustments (i.e. replace boards, grind high points etc.)   b. Install edge retention system as per  FIGS. 2A-2D     c. Install support screen  2     d. Install  2  spacers  25  or  26  with adhesive on each edge of the first tile   e. Decide on the location of the first tile.   f. Place the tile carefully onto the support screen making sure it lays flat in its final position against a retention edge (if it does not lay flat, cut out the high point in the support screen  2 )   g. Remove the protector tabs on one edge of the tile and slide the tile to its final position.   h. Remove protector tabs from another face of the tile.   i. Install the next tile by adding spacers  25  or  26  as required while repeating steps f, g and h above with subsequent tiles until the field is full.   j. Install the final non-adhesive spacers  25  or  26  in low traffic areas   k. Install polymeric sand or flexible gout as desired.