When it comes to the actual tiling, work across to the outside edge of one quadrant, then to the top or bottom, one row or course at a time. Fill in as you go. Double_check by measuring at least twice with a tape and a second time by dry_laying the tile prior to adhering.
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.
by Marina J. Ferrin on Jul 31, 2018 Ceramic Tile