Thin adhesives are unable to provide any bonding to porous substrates as they get absorbed by them.
Glue tile to plywood.
It is a cyanoacrylate adhesive which is single component gives instant strong pasting.
However the floor must be properly reinforced to minimize flexing.
There may be times when you want to bond tile directly to plywood or another wood surface rather than screwing down backerboard first.
Unscrew register covers and save the screws.
Answer we normally don t recommend to bonding to exterior glued plywood egp but it can be done in interior dry applications.
Backerboard can double the thickness of an installation which can be troublesome in some locations.
Fill in all large gaps and holes as these will prevent proper adhesion of the tiles.
Level the surface using a wood filler.
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.
Unscrew switch plate and outlet covers and set aside.
How to glue tile to wood.
Try using polyfix instant wood glue.
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.
Plywood will expand and deform if subjected to moisture or humidity.
You can bond tile directly to a plywood subfloor and expect it to last.
It gives perfect bonding to porous substrates like wood ceramic as it is a thick adhesive.