Ceramic Tile Over Osb Floor

Board is secured and has minimal if no deflection.

Ceramic tile over osb floor.

I have ripped up many a floor with 1 2 plywood as the tile substrate over 5 8 sheathing. Cut the backerboard to fit the edges of the room with a carbide tipped scoring tool. 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. Plywood and osb expand and contract with humidity and temperature much more than ceramic tile.

Ditra xl allows for ceramic tile application over single layer plywood osb subfloors on joists spaced at 24 610 mm o c. Lay down 1 2 inch thick cement backerboard over the wood subfloor or hardwood. The floor tiles became loose cracked and ugly looking over about 2 decades of use. Always follow the manufacturer s installation.

1 2 cement board over 5 8 plywood is often frowned upon as the cement board offers up no rigidity to the floor assembly. Planning and patience along with these tips will help ensure that you install the quality of finished flooring you are looking for. 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. This will cause either the tile itself to crack and even come loose or cause the grout to crack inside the joints.

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. As the plywood or osb expands the ceramic won t. What is your method for tiling over osb floors. Installing ceramic floor tile to a plywood sub floor has unique challenges beyond that of installation on a concrete floor.

Cab anyone advise if it is acceptable to tile directly onto osb board for wall tiles. Once spread it is dry and ready for flooring installation in about one hour. 1 2 plywood over 5 8 sheathing and then ditra nobel ts or 1 4 cement board. Can be installed on top of concrete plywood osb gypsum existing vinyl floors structural planks sub floors and radiant heated floors.

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. Now the entire flooring of ceramic tiles needs to be torn out and replaced. I have done in the past but wonder if this will hold up in longterm.