Tile Over Wood Subfloor

The most current ansi standards for tile installation a108 1999 specifically exclude osb.

Tile over wood subfloor.

Use the right. The compound must be allowed to dry completely before proceeding with tile installation which can be anywhere from 24 hours to a few days depending on the brand. Check for dips in the floor by sliding a 4 foot to 6 foot straight edge in different directions all around the room. When used as an underlayment the plywood sheets are laid over the osb or plywood subfloor for a two layer base.

Lay down 1 2 inch thick cement backerboard over the wood subfloor or hardwood. Splits and knots create weak spots that flex and lead to cracking tile. Installing over existing tile before installing ceramic tile over the existing tile you will need to roughen the existing ceramic tile surface to produce a better grip for the new ceramic tile. Second the strength of wood boards isn t always consistent.

Tips for laying tile on plywood subfloor for flooring use intervening sheets of plywood. Cut the backerboard to fit the edges of the room with a carbide tipped scoring tool. Lay down a vapour barrier overtop the concrete pad then fasten 3 4 inch plywood using a ramset to the concrete pad. Score the surface of the board.

Tape joints with alkali resistant cement. Fasten hardiebacker 1 4 board with corrosion resistant screws or galvanized roofing nails 8 inches apart. First changes in humidity make solid wood shrink swell and cup more than plywood. Place hardiebacker in staggered pattern so no four corners meet.

This is not to say that tile cannot be installed reliably over an osb subfloor. Use thinset with a higher latex content. While tile can be laid on plywood do not install tile directly onto. Prepare a wood subfloor for tile a successful tile installation project requires a level surface.

However there is significant debate in the tile industry regarding the conditions necessary for a long lasting successful installation. 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. 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. Trowel out bed of unmodified thinset over wooden subfloor.

If you find hollows and valleys you must fill them with a self leveling underlayment. Tape over holes and. Thinset is the wet base that you first trowel on the plywood to make the tile.