Tile Floor Subfloor Thickness

A subfloor is the bottom most structural level of your floor.

Tile floor subfloor thickness.

If it was 3 4 you could install 1 2 plywood over your existing 5 8 then 1 4 cbu then your tile. 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. The subfloor must be structurally sound as well as thick and stable enough to hold the weight of the tile without moving or flexing.

Should i install durock before laying the tile. If you are removing particle board then using the same size plywood will bring you back to the right height that you had before. For more information download our pdf about types of subfloors. 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.

It supports your decorative floor finish whether it s carpet hardwood vinyl laminate or tile. Nov 10 2013 sub floor thickness for tile subflooring should be a minimum of 1 and more if possible. 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. Cement fiber or similarly reinforced backer board comes in standard 1 4 inch and 1 2 inch thicknesses.

Regardless of the material it must be at least 1. This method only measures subfloor thickness. But combined with other methods that measure the finish floor you can get a fairly accurate reading of total floor thickness. I am laying the tile on a plywood sub floor above a basement.

If you re installing backer board over an existing subfloor 1 4 inch is sufficient. 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. The floors joist are 19 on center. 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.

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.