Ceramic Tile Over 3 4 Plywood

The preferred method for tile installations is to use a sheet of underlayment.

Ceramic tile over 3 4 plywood.

The tile guys used thin set mortar to glue down 3 4 plywood over the subfloor and they screwed the plywood to the subfloor every 3 in all directions. I am laying pebble rock tiles over a 3 4 plywood sub floor covered with a membrane and sealed with red gard. I aim for 3 4 inch underlayment when possible and i ll settle for 5 8 inch if the transition to another room will be trouble. Big marble tiles this is a big time savings benefit.

Concrete board concrete board also called backer board comes in 1 4 and 1 2 thicknesses and is usually sold in 4 x 6 sheets. I ll either use 1 4 inch cement backerboard or a proprietary product like schluter ditra. There are two materials commonly used for laying ceramic on plywood or osb that are applied before the tile. I am using a polymer modified mortar.

This means you can have a 3 4 inch wood subfloor covered by 1 2 inch plywood cement board or approved gypsum fiber underlayment. Tile installed over wood floor systems must have a minimum of 1 1 4 inches of solid material beneath it. Laying tile to veneer plywood risks loosening and unbonding the veneer creating an unstable base for the tile. Space out the board joints.

1 4 cement we took up old ceramic tile original with a 20 year old house and found no cement board or other underlayment material underneath. If possible you should always use concrete board underlayments rather than plywood. It should be fastened to the subfloor using thinset and then screwed down every 10 square. Thank you for all the informative posts.

For wall installations plywood is overkill beneath the concrete or fiber board which is designed in five eighths inch material for wall settings. Secondly i would never tile directly over the plywood as this video seems to imply is acceptable. Space the field and edge fasteners correctly the top layer of plywood should be screwed down every 8 inches on the edge and every 6 inches in the field or interior section. However i did find that the previous installer had put another sheet of 1 2 plywood over the 3 4 inch plywood subfloor.