Currently tearing down the guest bathroom from '74. The walls are made of concrete, plastered and filled with white filler. There was a "postage stamp" of tiles by the sink. Behind the tiles, it's plain plaster. I plan to install a column of tiles behind the sink instead and am now considering what type of filler is on the wall. Not all fillers are suitable for tiling. There is, for example, the "t-röd test" if you want to know what paint you have, but is there something equivalent for filler?
Splash on some water and see if this dissolves the spacklet, it is then unsuitable for tiles in the bathroom.
You can also set a single tile, let it dry for a couple of days and then see if the spacklet comes off when you remove the tile, it is then also unsuitable for tiling on. The spacklet must bond harder to the concrete/plaster than the adhesive bonds to the spacklet.
You can also set a single tile, let it dry for a couple of days and then see if the spacklet comes off when you remove the tile, it is then also unsuitable for tiling on. The spacklet must bond harder to the concrete/plaster than the adhesive bonds to the spacklet.
Probably gypsum plaster in that case, then the following applies for tiling:esox71 said:
"Tile
If the surface is to be used for tiling, it must not be felted or smoothed. The plaster surface must be level and flat, and only roughly evened out. Tiles should not be applied until the residual moisture is below 1% (white-dry, normally about 14 days). The plaster thickness should be at least 10 mm. Walls that will be exposed to splashing water should be treated with a suitable waterproof layer before cladding."
.MAY BE ASBESTOS. call a remediation company
Member
· Stockholms
· 1 555 posts
Don't scare people, that's not nice!raddforasbest said:
1. Why would it be asbestos?
2. If you're going to tile over the putty, why would asbestos in the putty be dangerous when you're not disturbing it?
3. Doesn't it feel a bit excessive to call for cleaners for half a square meter of thin putty?
If there's asbestos in the putty, and you're sanding it every day for several years, and you have no breathing mask at all, and you're a chain smoker, you might get sick from it after 25-35 years if you're unlucky.
Well asbestos is unlikely to be in the white surface plaster. However, it did cross my mind that it could be in the old fix, but I didn't care and chipped everything away anyway. As Fred says, it would take a lot for someone to be affected by asbestos.