Patent ID: 7793471

Claim:
A floating floor comprising: a plurality of interconnected subunits, each subunit including: an injection-molded substrate having a support grid formed by three intersecting sets of equidistantly-spaced, parallel walls, which form an array of interstitial openings; a perimetric wall which surrounds the support grid and forms the sides and outer perimeter of the substrate; a laminar sheet unitary and coextensive with the support grid and perimetric wall, which covers an upper end of each interstitial opening; an interlock structure, including both female and male components which extend, at least partially, beyond the outer perimeter of the substrate, said interlock structure enabling reversible attachment with other substrates of similar design having the same interlock structure; a vertical stabilization system, including a system of interlocking tabs and slots discontinuously positioned about said outer perimeter, said vertical stabilization system restraining vertical movement between adjacent interlock coupled substrates; wherein said tabs and slots being located substantially completely between said male and female components; a tile selected from the group consisting of stone, ceramic and porcelain bonded to an upper surface of the laminar sheet; means for ensuring that the tile is uniformly spaced from the outer edges of the substrate; and grout installed between outer edges of adjacent tiles, said grout having sand embedded within a flexible matrix.