Ceramic Tile Over Osb Floor

The floor tiles became loose cracked and ugly looking over about 2 decades of use.

Ceramic tile over osb floor. 1 2 plywood over 5 8 sheathing and then ditra nobel ts or 1 4 cement board. Always follow the manufacturer s installation. Cut the backerboard to fit the edges of the room with a carbide tipped scoring tool. As the plywood or osb expands the ceramic won t.

Board is secured and has minimal if no deflection. Ditra xl allows for ceramic tile application over single layer plywood osb subfloors on joists spaced at 24 610 mm o c. Plywood or osb flakeboard can expand and contract at too high a rate to be a stable foundation for tile. Can be installed on top of concrete plywood osb gypsum existing vinyl floors structural planks sub floors and radiant heated floors.

I have ripped up many a floor with 1 2 plywood as the tile substrate over 5 8 sheathing. 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. I have done in the past but wonder if this will hold up in longterm. 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.

This will cause either the tile itself to crack and even come loose or cause the grout to crack inside the joints. Lay down 1 2 inch thick cement backerboard over the wood subfloor or hardwood. Ceramic tile doesn t expand contract nearly as much. Planning and patience along with these tips will help ensure that you install the quality of finished flooring you are looking for.

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. Plywood and osb expand and contract with humidity and temperature much more than ceramic tile. Once spread it is dry and ready for flooring installation in about one hour. 1 2 cement board over 5 8 plywood is often frowned upon as the cement board offers up no rigidity to the floor assembly.

What is your method for tiling over osb floors. 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. 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.