If you have a tiling job to do in your bathroom and the walls have been skimmed with plaster you have.
Tiling over plaster walls bathroom.
If plaster is any way compromised you should tear out to studs and start over.
But with cement board.
Bring plumbing to code.
You may tile over existing tile painted or unpainted drywall plaster and textured walls.
Tiling over damp plaster causes the wall to fail because the plaster won t become strong if it can t dry out.
Cover with cement board tape off.
Add a diverter and shower line in the wall.
Tiling on a plaster wall tiling on plaster.
The adhesive and tile will block moisture from evaporating.
This was back in the 80 s.
However tiling over tile can add quite a bit of thickness so make sure your wall can handle the weight.
If you re not sure if you have lead paint test kits are available.
It is important to check the weight of your tiles as plaster skim has a 20kg per square meter weight ratio.
You may not have lathe but compressed board under the plaster and scratch coat.
Fresh plaster whether applied as a patch or to the entire wall must dry completely before tile is applied.
Follow manufacturer instructions to a tee.
That is true you cannot tile over plaster if that s your plan.
It used to be very common to put tile up on whatever the wall was and seal the the tile.
The problem otherwise is that grout is porous and any slight crack will cause moisture and mold on any other surface.
I have repaired tile jobs that were over 20 years old that the tile was applied directly to regular sheetrock and plaster walls.