Cut the backerboard to fit the edges.

Tile over hardwood subfloor. The tile council of north america tcna calls for a subfloor of 19 32 inch tongue and groove plywood to be installed over wood joists spaced 16 inches on center with a 1 8 inch gap between sheets. How to tile on a wooden floor 1. Trowel on a thin layer of thinset mortar over the. Tips for laying tile on plywood subfloor for flooring use intervening sheets of plywood.

You shouldn t tile directly over hardwood flooring since it can expand contract and cup due to seasonal changes in temperature and humidity. A 3 4 inch plywood subfloor on a joist structure with 24 inch spacing needs the extra thickness of cementboard or the floor will flex and the tiles will crack. While tile can be laid on plywood do not install tile directly onto. Installing tile over a wood subfloor is a lot easier today than it was when i started my remodeling career.

Second the strength of wood boards isn t always consistent. Measure the wall. According to backer board manufacturers and tile setters installing backer board directly over an old solid wood subfloor is risky for a couple of reasons. Press the blade into the grout joint turn the machine on and let the grout vibrate into powder.

To tile over hardwood you d need to clean it first preferably with mineral spirits to remove any build up you may have on the surface. Hardwood flooring is usually finished with some form of polyurethane. First changes in humidity make solid wood shrink swell and cup more than plywood. The nature of this finish will tend to reject things that are trying to bond to it including your tile adhesive.

Lay down 1 2 inch thick cement backerboard over the wood subfloor or hardwood. Use the right. Uncoupling membranes aren t recommended for tiles smaller than 2 inches square and should not be used when covering old hardwood flooring due to adhesion problems. This should be followed by a second layer of 15 32 inch thick plywood installed with a 1 4 inch gap between sheets.

This finished tile floor is installed over a plywood and cement backer board subfloor. 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. Remove the grout around single tiles with the oscillating tool. If the hardwood flooring is composed of narrow boards with a very smooth flat surface you could leave the flooring in place and screw cement backer board down on top of it before applying the tile.

Apply fiberglass tape to each seam in the backerboard to cover it. 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. Use thinset with a higher latex content.

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