How Do You Install And Maintain A Natural Stone Floor?
SUB FLOOR As with all rigid tiles a firm sub-floor is needed for the laying of a natural stone floor. An even and level sand and cement screed is the ideal surface, but suspended wooden floors need not be a problem as long as they are strengthened. Normally waterproof plywood screwed down to existing floorboards at 200mm centres is enough, but if in doubt it is best to get professional advice. If levels are problem, plywood can be screwed straight to joists ( if the joints between the sheets are supported by noggins at 250mm intervals ) INSTALLATION The tiles should be laid with an adhesive. The adhesive bed should average +/- 5mm in thickness, but should never exceed 10mm. When laying on a suspended wooden floor or using any form of underfloor heating, a flexible additive must be used with the adhesive and the grout. In all instances the back of the stone should be ‘buttered’ before fixing to provide a key. If the tile is too dry it must first be wet with water to improve adhesion. Wh
