Try laying tile over 1 2 durock or hardie and see what happens when the joists are 19 2 or 24 on center.
Tiling floors on plywood.
Lay tiles with a 3mm bed of improved flexible tile adhesive s1 such as weberset spf or weberset rapid spf and leave joints of at least 3mm wide for grouting and make provisions for movement.
For this reason ceramic and porcelain tile floors can be considered somewhat delicate despite the inherent strength of the material.
To install ceramic tile over wood the wood surface must be structurally sound enough to support the weight of the tile.
If you are tiling on a plywood floor with tiles above 400mm by 400mm in size or heavier tiles made of stone quartz or terrazzo you will.
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Chipboard cushioned vinyl flooring particle boards of any type oriented strand board osb interior grade plywood tongue and groove planking and hardwood floors are unsuitable substrates for direct installation of ceramic tile.
Preparation for installing floor tile depends on the type of subfloor in the room you are tiling.
Deflection of l 360 for ceramic tile and l 720 for natural stone tiles.
Installing over wood.
The tile council of america tca recommends a max.
But a number of precautions must be taken to ensure a successful installation.
A subfloor is the bottom most structural level of your floor.
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.
Residential floors are typically sized for a live load of 40 psf and a dead load or 10 psf.
This is fine for wood carpeting and resilient flooring but not for ceramic tile.
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Tile floors are likely to weigh 15 to 20.
For the best results when tiling onto plywood floors follow these instructions.
A number of different types of substrate are used for tile including plywood.
Under british standards bs 5385 part 1 plywood has now been excluded as a suitable substrate material for the direct fixing of wall tiles therefore when tiling on to walls a tile backer board is required however tiling onto plywood floors is still acceptable under british standards.
Or tile backer board.
For more information download our pdf about types of subfloors.
Tile can be installed over a plywood substrate and it is actually a fantastic way to make sure you don t have deflection in your floor.
Reply to plywood for tiling on floors.
Lay tiles with a suitable flexible tile adhesive.
It supports your decorative floor finish whether it s carpet hardwood vinyl laminate or tile.
