Plywood Subfloor Thickness For Tile

The subfloor is the decking installed on top of flooring joists.

Plywood subfloor thickness for tile. Installed radiant heating wire on top of that and yesterday i poured ardex liqiud backer board over the wires. Most prefer a minimum thickness of at least 1 1 4 inch such a inch t g subfloor with inch plywood underlayment. Adding inch plywood to 5 8 ply will give you a combined nominal thickness of 7 8 inch. Plywood and osb are the two most common materials used for floor decking and typically they are 5 8 or 3 4 thick.

Installed 1 2 plywood over the existing sub floor. I ended up putting 1 2 plywood over the existing sub floor. The plywood must be exterior grade for all wet areas and it has to be installed in such a way that the joints between each layer do not line up using what is known as a stagger pattern to keep the pieces from ever lining up. Tile over wood subfloor.

In this scenario jim and rich install 1 2 cementious backer unit cbu resulting in at least an 1 1 8 thick subfloor. 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 finished floor is then installed on top of the subfloor. Installed tiles with ardex x5.

The subfloor must be structurally sound as well as thick and stable enough to hold the weight of the tile without moving or flexing. X5 was a fantastic product to work with. The minimum thickness allowed for ceramic tile installations is two sheets of 5 8 inch thick plywood. Plywood comes in a variety of thicknesses beginning at 1 8 inch and increasing to 1 inch.

The thickness needed for subflooring depends on the type of floor that will go on top and the primary purpose for the subfloor. Regardless of the material it must be at least 1. Plywood is the most common type of subflooring.