Place hardiebacker in staggered pattern so no four corners meet.
Tile over wood subfloor.
However there is significant debate in the tile industry regarding the conditions necessary for a long lasting successful installation.
When used as an underlayment the plywood sheets are laid over the osb or plywood subfloor for a two layer base.
If you find hollows and valleys you must fill them with a self leveling underlayment.
Second the strength of wood boards isn t always consistent.
A couple options considered are.
Lay down a vapour barrier overtop the concrete pad then fasten 3 4 inch plywood using a ramset to the concrete pad.
Use thinset with a higher latex content.
If water seeps through the tile installation to the underlayment it will not cause the wood to swell as happens with interior grade plywood.
Check for dips in the floor by sliding a 4 foot to 6 foot straight edge in different directions all around the room.
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.
Use the right.
Tape over holes and.
While tile can be laid on plywood do not install tile directly onto.
First changes in humidity make solid wood shrink swell and cup more than plywood.
Tips for laying tile on plywood subfloor for flooring use intervening sheets of plywood.
Trowel out bed of unmodified thinset over wooden subfloor.
Fasten hardiebacker 1 4 board with corrosion resistant screws or galvanized roofing nails 8 inches apart.
Cut the backerboard to fit the edges of the room with a carbide tipped scoring tool.
Score the surface of the board.
Lay down 1 2 inch thick cement backerboard over the wood subfloor or hardwood.
Install 1 4 inch cork by thin setting it to the concrete pad then installing the heating system by fastening it to.
This is not to say that tile cannot be installed reliably over an osb subfloor.
Splits and knots create weak spots that flex and lead to cracking tile.
Thinset is the wet base that you first trowel on the plywood to make the tile.
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.
Tape joints with alkali resistant cement.
Prepare a wood subfloor for tile a successful tile installation project requires a level surface.