Ceramic Tile Over Osb Floor

I have done in the past but wonder if this will hold up in longterm.

Ceramic tile over osb floor.

Planning and patience along with these tips will help ensure that you install the quality of finished flooring you are looking for. Installing ceramic floor tile to a plywood sub floor has unique challenges beyond that of installation on a concrete floor. This will cause either the tile itself to crack and even come loose or cause the grout to crack inside the joints. Preparing your subfloor for tile in this video learn how to prepare a wood or concrete subfloor for tile including such steps as checking for dips installing backerboard applying primer and thinset pouring liquid underlayment and when to use osb or exterior grade plywood.

Lay down 1 2 inch thick cement backerboard over the wood subfloor or hardwood. Cab anyone advise if it is acceptable to tile directly onto osb board for wall tiles. The floor tiles became loose cracked and ugly looking over about 2 decades of use. Ceramic tile doesn t expand contract nearly as much.

Now the entire flooring of ceramic tiles needs to be torn out and replaced. Cut the backerboard to fit the edges of the room with a carbide tipped scoring tool. Regular seasonal humidity shifts are significant enough to make the average 10 x 10 wood subfloor floor expand or contract as much as 1 2. 1 2 plywood over 5 8 sheathing and then ditra nobel ts or 1 4 cement board.

Board is secured and has minimal if no deflection. Plywood or osb flakeboard can expand and contract at too high a rate to be a stable foundation for tile. I have ripped up many a floor with 1 2 plywood as the tile substrate over 5 8 sheathing. As the plywood or osb expands the ceramic won t.

Plywood and osb expand and contract with humidity and temperature much more than ceramic tile. Always follow the manufacturer s installation. Both are portland cement based with a compressive strength of 4 500 psi pounds per square inch and can also be used over concrete ceramic tile quarry tile terrazzo and existing asphalt adhesive residue. Once spread it is dry and ready for flooring installation in about one hour.

What is your method for tiling over osb floors. Osb panels provide an excellent base for many types of finished flooring including ceramic tiles if careful attention to the construction and preparation of the subfloor is paid in order to avoid costly callbacks. We are thinking about having the 3 8th inch plywood torn out and replaced by 1 4 inch concrete board before the new tiles are installed.