Tile Floor Subfloor Thickness

The subfloor must be structurally sound as well as thick and stable enough to hold the weight of the tile without moving or flexing.

Tile floor subfloor thickness.

Tile subfloor thickness deflection installing electric radiant heat pouring self leveling mortar leveling flattening the subfloor installing cement board cbu installing schluter ditra marking guidelines for tile how to lay tile how to grout tile joints there s a lot of information and mis information online about what constitutes a suitable subfloor for tile and it s tough to find a. 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. I was thinking 1 4 durock and 1 4 tile which would make my floor height almost the same as my hardwoods in the other rooms. A 3 4 inch plywood subfloor on a joist structure with 24 inch spacing needs the extra thickness of cementboard or the floor will flex and the tiles will crack.

For more information download our pdf about types of subfloors. A subfloor is the bottom most structural level of your floor. If it was 3 4 you could install 1 2 plywood over your existing 5 8 then 1 4 cbu then your tile. Cement fiber or similarly reinforced backer board comes in standard 1 4 inch and 1 2 inch thicknesses.

Nov 10 2013 sub floor thickness for tile subflooring should be a minimum of 1 and more if possible. If you re installing backer board over an existing subfloor 1 4 inch is sufficient. Should i install durock before laying the tile. The bare minimum recommended by most tile setters is a total subfloor thickness of 1 1 8 inch.

I am laying the tile on a plywood sub floor above a basement. This method only measures subfloor thickness. It supports your decorative floor finish whether it s carpet hardwood vinyl laminate or tile. Regardless of the material it must be at least 1.

Adding inch plywood to 5 8 ply will give you a combined nominal thickness of 7 8 inch. I am installing ceramic 12 inch by 12 inch tiles in my foyer 150 sq ft. Most prefer a minimum thickness of at least 1 1 4 inch such a inch t g subfloor with inch plywood underlayment. Preparation for installing floor tile depends on the type of subfloor in the room you are tiling.

But combined with other methods that measure the finish floor you can get a fairly accurate reading of total floor thickness.