Tile Over Wood Subfloor

Use thinset with a higher latex content.

Tile over wood subfloor.

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. First changes in humidity make solid wood shrink swell and cup more than plywood. Check for dips in the floor by sliding a 4 foot to 6 foot straight edge in different directions all around the room. Fasten hardiebacker 1 4 board with corrosion resistant screws or galvanized roofing nails 8 inches apart.

Trowel out bed of unmodified thinset over wooden subfloor. Use the right. Thinset is the wet base that you first trowel on the plywood to make the tile. Place hardiebacker in staggered pattern so no four corners meet.

Tape joints with alkali resistant cement. Lay down 1 2 inch thick cement backerboard over the wood subfloor or hardwood. Tape over holes and. While tile can be laid on plywood do not install tile directly onto.

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. This is not to say that tile cannot be installed reliably over an osb subfloor. Lay down a vapour barrier overtop the concrete pad then fasten 3 4 inch plywood using a ramset to the concrete pad. Second the strength of wood boards isn t always consistent.

Score the surface of the board. The most current ansi standards for tile installation a108 1999 specifically exclude osb. A couple options considered are. Install 1 4 inch cork by thin setting it to the concrete pad then installing the heating system by fastening it to.

If you find hollows and valleys you must fill them with a self leveling underlayment. However there is significant debate in the tile industry regarding the conditions necessary for a long lasting successful installation. Splits and knots create weak spots that flex and lead to cracking tile. Cut the backerboard to fit the edges of the room with a carbide tipped scoring tool.

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. When used as an underlayment the plywood sheets are laid over the osb or plywood subfloor for a two layer base. 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.