Tile Over Wood Subfloor Bathroom

Don t lay tiles on a concrete slab with cracks that appear to be spreading or irregularities that prevent you from leveling it.

Tile over wood subfloor bathroom.

The old fashioned mud method of floating a thick mortar bed in preparation for the tile has given way to using cement backer board over a plywood subfloor. Even if you use a waterproof underlayment membrane the floor will still be either 1 4 or 1 2 higher than the subfloor plus the thickness of the tile and adhesive. Second the strength of wood boards isn t always consistent. While i prefer using 1 2 cement backer board over a plywood subfloor you may be able to get by with 1 4 backer board instead.

If installing over an appropriate wood surface sand the wood to make it smoother and remember that the installation will work better over a subfloor at least 1 1 8 inches thick. If water seeps through the tile installation to the underlayment it will not cause the wood to swell as happens with interior grade plywood. This guide will show you how to prepare your subfloor for a tile installation project to ensure that it s fit to support ceramic or porcelain tile. Tape over holes and cracks in the wood subfloor or slab before pouring on the self leveling tile underlayment to keep it from seeping through and leaving indentations.

The subfloor must be free of moisture damage including rot and sponginess and must be securely fastened to the joists and squeak free. Installed directly over the joists the primary function of a subfloor is to create a flat solid surface for the finished flooring to rest on. If the tile is being installed in a bathroom consider applying an isolation membrane over your wood subfloor to further protect against expansion and contraction. Preparing a subfloor is an essential step for installing floor tile it provides a level surface that will allow the tiles to properly stay in place.

It uncouples or releases the bond between plywood and tile mortar allowing each surface to move independently of each other. Installing tile over a wood subfloor is a lot easier today than it was when i started my remodeling career. A tight unmoving bond between mortar and subfloor causes cracking. In addition uncoupling tile membranes prevent moisture from infiltrating surfaces below.

An uncoupling membrane does exactly what the name says. When used as an underlayment the plywood sheets are laid over the osb or plywood subfloor for a two layer base.