Tile Floor Subfloor Thickness

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.

Tile floor subfloor thickness.

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. If you re installing backer board over an existing subfloor 1 4 inch is sufficient. The floors joist are 19 on center. Preparation for installing floor tile depends on the type of subfloor in the room you are tiling.

Cement fiber or similarly reinforced backer board comes in standard 1 4 inch and 1 2 inch thicknesses. If you are removing particle board then using the same size plywood will bring you back to the right height that you had before. The subfloor must be structurally sound as well as thick and stable enough to hold the weight of the tile without moving or flexing. But combined with other methods that measure the finish floor you can get a fairly accurate reading of total floor thickness.

This method only measures 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. A subfloor is the bottom most structural level of your floor. For more information download our pdf about types of subfloors.

If it was 3 4 you could install 1 2 plywood over your existing 5 8 then 1 4 cbu then your tile. I am laying the tile on a plywood sub floor above a basement. Nov 10 2013 sub floor thickness for tile subflooring should be a minimum of 1 and more if possible. Adding inch plywood to 5 8 ply will give you a combined nominal thickness of 7 8 inch.

It supports your decorative floor finish whether it s carpet hardwood vinyl laminate or tile. 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. 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.

If you have an older subfloor constructed of multiple slats rather than large sheets of plywood you can insert your straight edge between the slats.