Tile Over Osb Subfloor Floor

What is your method for tiling over osb floors.

Tile over osb subfloor floor.

Direct gluing vinyl sheet and tile to osb subfloors installing a glue down vinyl floor sheet or tile directly over oriented strand board osb subflooring has become a hot topic for me of lately. Leave a slight 1 16 gap between each. The most current ansi standards for tile installation a108 1999 specifically exclude osb. However there is significant debate in the tile industry regarding the conditions necessary for a long lasting successful installation.

This is not to say that tile cannot be installed reliably over an osb subfloor. The only thing that changes is that on osb subfloors we use pl with teh ring nailer for putting down underlay. Ceramic tile doesn t expand contract nearly as much. Ceramic tiling can be installed onto 23 32 osb subflooring panels where the panels are supported by 16 o c.

Regular seasonal humidity shifts are significant enough to make the average 10 x 10 wood subfloor floor expand or contract as much as 1 2. Measure the dimensions of the room to calculate how much material you ll need to purchase. Manufacturers generally recommend that the deflection of the subfloor system be limited to no more than span 360 under total load. Cover the entire osb subfloor with a layer of 1 4 plywood underlayment.

Plywood and osb expand and contract with humidity and temperature much more than ceramic tile. As the plywood or osb expands the ceramic won t. Tiling over an old solid wood subfloor is dicey even with a layer of backer board. On higher end jobs we use 3 4 plywood otherwise osb.

What we put down for a subfloor depends on the budget. By the diy experts of the family handyman magazine reinforce old 1 x subflooring before adding backer board.