Subfloor Material For Ceramic Tile

For this reason ceramic and porcelain tile floors can be considered somewhat delicate despite the inherent strength of the material.

Subfloor material for ceramic tile.

It sounds like your joists are well within the acceptable limits of l 300 so your main concern is the deflection of the subfloor between joists. However you re not out of the woods. Concrete expands and contracts and that type of movement can also crack the tiles and the grout. When installing a ceramic tile floor on a concrete subfloor you don t have to worry about flexing as long as the concrete slab is at least 1 1 8 inch thick which most slabs are.

Check for dips in the floor by sliding a 4 foot to 6 foot straight edge in different directions all around the room. A plywood subfloor must be structurally sound and able to support the installation. With ceramic tile you also need to limit the deflection between joists which is a function of the subfloor thickness and how it is installed. 2 prepare a wood subfloor for tile a successful tile installation project requires a level surface.

Tile floors are heavy and tile is a hard material. For ceramic tile the tile council recommends using joists that are 16 inches on center a 3 4 inch thick plywood subfloor and a 1 2 inch thick cement backer board or concrete slab. It will break or dislodge if the surface bends under the load. Because of issues of moisture movement and adhesion ceramic tile will work well with certain types of subfloor underlayment systems and can go dramatically wrong with other subfloor materials.

Laying tile on plywood.