3 4 Inch Plywood For Tile Floor Substrate

Now largely regarded as the very best underlayment for ceramic tile in any application floors walls and countertops cement based backer board goes by many names.

3 4 inch plywood for tile floor substrate.

The builder hired used 3 4 osb for the flooring while the tile contractor used a 1 4 cbu under the tile thus achieving 1 in total depth. This means you can have a 3 4 inch wood subfloor covered by 1 2 inch plywood cement board or approved gypsum fiber underlayment. Backer board panels typically measure 3 feet by 5 feet and can be trimmed as needed. Continue this process to lay the rest of your backer board panels leaving a 1 4 inch gap at the walls.

Use 16d common nails to create a gap of 1 8 inch between the sheets. I built a home about 7 years ago that is having all kinds of problems with the tile flooring cracked tile displaced grout creaky flooring 1 2 deflection in some areas. It is generically called cement board or backer board or it can also be referred to by one of the common brand names such as densshield hardiebacker and wonderboard. Most prefer a minimum thickness of at least 1 1 4 inch such a inch t g subfloor with inch plywood underlayment.

The floor tiles became loose cracked and ugly looking over about 2 decades of use. 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. The bare minimum recommended by most tile setters is a total subfloor thickness of 1 1 8 inch. Leave a gap of 1 8 inch between sheets for thin set mortar or tile.

Most plywood underlayment is about 1 4 inch thick and has square edges and a smooth knot free top face. Uncoupling membranes aren t recommended for tiles smaller than 2 inches square and should not be used when covering old hardwood flooring due to adhesion problems. You can use it as a stand alone product as well as a finish type plywood if it has a laminate finish that you can paint or finish according to personal preference. Tile installed over wood floor systems must have a minimum of 1 1 4 inches of solid material beneath it.

To cut backer board measure and mark the size you need. Use 5 8 inch thick exterior grade plywood placed with the smooth side up and the top grain perpendicular to the floor framing. Adding inch plywood to 5 8 ply will give you a combined nominal thickness of 7 8 inch. Now the entire flooring of ceramic tiles needs to be torn out and replaced.

This provides adequate support for a wide range of finish materials. Cement based backer board. It typically comes in 4 x 8 foot sheets. Thin set was used instead of glue or adhesive.