Wall preparation keep the installation surface clean and dry.
How to lay tile on plywood wall.
Be sure to put spacers between each tile as you go.
Never install new tiles over existing tiles or onto an unprotected wood or plywood floor.
If you put tile directly on top of plywood it will chip and break.
If possible you should always use concrete board underlayments rather than plywood.
The preferred method for tile installations is to use a sheet of underlayment.
Whenever you re laying tile on a wood subfloor you need to first install cement backerboard to prevent leaks and water damage.
For wall installations plywood is overkill beneath the concrete or fiber board which is designed in five eighths inch material for wall settings.
To install the concrete board apply tile adhesive to the back then press it down against the plywood.
Do not install glass tile over particleboard chipboard masonite press wood plywood or asbestos surfaces.
For the best results when tiling onto plywood floors follow these instructions.
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.
Use long sweeping motions to apply mortar to the wall and start placing your tiles in the marked locations.
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.
Center your tile in the bathroom.
Step 4 center.
To install ceramic wall tile use a level and measuring tape to mark the tile locations on the wall with chalk.
Unlike wood or drywall sub surfaces cement backerboard will not rot warp or grow mold and mildew when exposed to water.
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.
Next mix your grout and spread it into the gaps between the tiles using.
Use your drill to make this job simpler.