You can bond tile directly to a plywood subfloor and expect it to last.
Glue ceramic tile to plywood.
However the floor must be properly reinforced to minimize flexing.
To be sure maybe drill up to 6 evenly spread out holes in the plywood at least 4mm deep or straight through in the areas to be tiled so the adhesive sinks into the holes and hardens hence creating a stronger fix.
Level the surface using a wood filler.
Unscrew register covers and save the screws.
How to glue tile to wood.
Fill in all large gaps and holes as these will prevent proper adhesion of the tiles.
The joists if they re 2x8 newer code and not 2x10 older code must be braced every four feet with cross braces which minimizes independent flexing of each joist and the subfloor above.
Add the dry mortar to the bucket along with any liquid additives recommended by the manufacturer.
If you are working in an interior setting in a dry area where the tile will never come into contact with water you can install the tile directly onto the face of the plywood so long as you use the proper type of thinset.
Slowly add in the.
It should be fastened to the subfloor using thinset and then screwed down every 10 square.
Clean and heavily score area to where tiles are to be fixed it sounds like the adhesive does not have a rough surface in which to secure itself to.
Thinset is the wet base that you first trowel on the plywood to make the tile stick.
How to bond tile to wood.
Find the ratio of water to dry mortar and reduce to the smallest amount you can use in 20 minutes.
There are thin set dry set mortars design specifically for adhering ceramic tile to plywood that is designated as an ansi a118 11 thin set mortar.
Remove any obstacles from the installation area.
Higher latex content is essential for bonding to plywood.
The silicone or urethane adhesives should work too but the thin set mortars are easier to work with and easier to get full adhesive contact between the tile and its substrate.
Thin set dries quickly and it must be.
Concrete board concrete board also called backer boardcomes in 1 4 and 1 2 thicknesses and is usually sold in 4 x 6 sheets.
One example would be to use laticrete s 317 thinset mixed with laticrete 333 liquid latex additive.