Roca Tile Riviere Gris Porcelain 24" x 48"

Roca Tile's Riviere Gris is a 24" x 48" glazed porcelain tile, made in Spain and 9 mm thick. Roca Riviere Gris is for the hardest-worn floors in a house and for retail and hospitality. It solves a floor that will be walked on all day for years. That is what the PEI 5 wear rating means in practice. A dynamic coefficient of friction of 0.42 or above clears the ANSI A326.3 threshold of 0.42, so it is rated for a level interior floor that gets wet. Water absorption of 0.5% or less is the figure that makes it a porcelain rather than a ceramic. The trade-off with any glazed tile is that the colour sits on the surface rather than running through the body, so a deep chip shows the biscuit underneath. The edges are rectified, cut square after firing, which lets a tiler close the joint to about an eighth of an inch. It also means the substrate has to be flat, because a tight joint leaves nowhere to hide a dip. Pair it with a matching bullnose or a metal trim at the edges, an uncoupling membrane over a concrete slab, and a large-format mortar, because a tile this size needs full coverage under it. A box of Riviere Gris tile holds 2 pieces and covers 15.5 square feet. Order the area you are covering plus about ten per cent for cuts and breakage.