Water_resistant backer board, not drywall, should be used under tile that is likely to get wet (shower walls and bathroom floors, for example). Whether it's backer board, plywood, or concrete, the substrate needs to be sound, clean, and dimensionally stable. Surfaces need to be level or plumb and true to plane, as the pros say__that means no bumps. Wallpaper, loose plaster, flaking paint, peeling tiles or unsecured sheet flooring must be removed from the walls or floors that are to be tiled.
One simple way to enhance your color scheme is to add a dye or pigment to the grout. White grout, even after it has been sealed with a grout sealer (which is recommended, especially for floors), may prove difficult to keep clean.
by Shirley C. Howard on Aug 01, 2018 Ceramic Tile