Testing the wall for durability.
Tile over plaster walls.
If plaster is any way compromised you should tear out to studs and start over.
It used to be very common to put tile up on whatever the wall was and seal the the tile.
Bring plumbing to code.
Don t use paint glue pva wall paper paste only use the primer recommended by the adhesive manufacturer of your chosen tile adhesive.
But with cement board.
That is true you cannot tile over plaster if that s your plan.
Follow manufacturer instructions to a tee.
Mix degreasing cleaner with water in a bucket using a dilution recommended by the cleaner manufacturer.
You may tile over existing tile painted or unpainted drywall plaster and textured walls.
If you re not sure if you have lead paint test kits are available.
Cover with cement board tape off.
Mold does not grow on cement.
Adhesive grout and tile 20kg max weight onto plaster.
You should not tile over wallpaper glossy surfaces lead paint or plywood.
However tiling over tile can add quite a bit of thickness so make sure your wall can handle the weight.
Not all plaster wall surfaces will support the tile properly.
Both painted and bare plaster allows for the installation of tile.
This was back in the 80 s.
I have repaired tile jobs that were over 20 years old that the tile was applied directly to regular sheetrock and plaster walls.
Loose paint must be scraped.
Or flatten walls with a latex modified skim coat product.
Scrub the wall tiles with diluted degreasing cleaner and a nylon scrub brush.
You would have to remove the plaster and replace it not with drywall run from a contractor who says that.
Also now it s been plastered you will be restricting yourself to a tile with a max weight of about 16 kg m2.
Layer newspaper on the floor across the bottom of the tiled wall.
Can you lay tile on plaster walls.