Tiling Over Plywood Underlayment

Check for dips in the floor by sliding a 4 foot to 6 foot straight edge in different directions all around the room.

Tiling over plywood underlayment.

Roll on a layer of latex primer sealer. If the structure is adequate the use of a cement based floor patch that allows for the needed height may be the best choice. The go to product is 1 2 in. Fill seams in the subfloor with caulk.

No matter how firm the subfloor. While tile can be laid on plywood do not install tile directly onto the plywood subfloor itself. The plywood will expand and contract at a different rate as the tile causing cracks to develop in the grout lines or tiles over time. Tape over holes and cracks in the wood subfloor or slab before pouring on the self leveling tile underlayment to keep it from seeping through and leaving indentations.

Void free underlayment grade panels which both stiffen the existing floor and provide uniform support to prevent cracks in the tile above. For residential use one form of underlayment the tile council of north america s handbook allows is plywood over joists that are 16 in. Once properly in place and cured the tile can be installed. Begin by applying the thin skin adhesive to the plywood with a smooth trowel.

This prepares and seals the surface for the. A tapered piece of plywood may be difficult to fabricate and may not offer the support required for a good installation. Once the surface is completely covered cover the adhesive with the fiberglass based paper and smooth out any wrinkles or bubbles with a broad drywall knife. Step 5 skim coat the paper.

Use intervening layers of two sheets of plywood.