FAQ: How To Tile A Bathroom Floor Over Plywood?

FAQ: How To Tile A Bathroom Floor Over Plywood?

Can you lay tile directly on plywood?

While tile can be laid on plywood, do not install tile directly onto the plywood subfloor itself. Use intervening layers of two sheets of plywood.

What do you put on plywood before tiling?

On a plywood subfloor, you need either a layer of cement backer board or an underlayment membrane, like Custom Building Products’ Wonderboard and RedGard, between the subfloor and tile for the thin-set adhesive to achieve a good bond.

Can you tile over plywood in shower?

You cannot install tile directly onto plywood because it is not dimensionally stable. If you put tile directly on top of plywood, it will chip and break. To install the concrete board, apply tile adhesive to the back, then press it down against the plywood.

Do I need to prime plywood before tiling?

If tiling on fibre-reinforced cement sheets, or plywood /chipboard, then we would always recommend priming the reverse side and edges with BAL Bond SBR. This helps protect the plywood from moisture penetration which could cause the board to swell.

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How thick should Plywood be under tile?

The subfloor under the tile should be at least 1 1/8″ thick, with a minimum of 5/8″ thick exterior grade plywood topped by 1/2″ cement backer board.

Should you tile on plywood?

It is NOT recommended to use plywood in wet areas because excess water / moisture can cause the boards to over expand, and so a suitable tile backer board should be used with a suitable waterproofing system, like BAL Waterproof Plus or Laticrete Hydroban.

How do you waterproof a bathroom subfloor plywood?

Apply a bead of the silicone caulk around the entire perimeter of the subfloor. Place the angled part of the nozzle flat against the crevice between the subfloor and the bottom of the wall and squeeze the trigger slowly. Move the caulk gun evenly along the crevice to apply a bead of caulk.

What kind of plywood do you use for subfloor under tile?

Exterior-Grade Plywood Exterior plywood is an acceptable underlayment for tile and is preferred to interior-grade plywoods because the bonding adhesives used are waterproof. If water seeps through the tile installation to the underlayment, it will not cause the wood to swell, as happens with interior-grade plywood.

Can you attach tile to wood?

Yes, tile can be applied directly to wood using either mastic or thinset cement. You might also use a construction or any one of a number of specialty adhesives.

Will Thinset stick to plywood?

Thinset sticks just fine to plywood, but that’s not really the question in your post. First question is to back up and ask what you’re doing exactly. If you’re attaching backerboard to plywood, thinset does not behave as an adhesive.

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How do you tile over floor boards?

Top tip: When tiling a wooden floor, use a flexible tile adhesive and grout to reduce the risk of cracking. Opt for a silicone sealant around the edge of the room, rather than solid filler. This will allow your tiles to flex as you walk over them, rather than pulling away from the wall or skirting board and cracking.

Is cement board stronger than plywood?

Cement backerboard is more stable than plywood in high humidity and other wet environments. It won’t swell and buckle the way that plywood does, so it’s safe to use in mudrooms and bathrooms where things like spills and puddles are normal, as well as in areas with high levels of moisture in the air.

Can you use thinset to level a plywood floor?

Because mortar will stick to the concrete slab and the wood subfloor, and mortar will stick to mortar, then it would only make sense that mortar would work for leveling or patching, right? Well, the answer is actually no. Mortars cannot be used to level or patch a floor – ever!

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