Putty thoughts!

[54321]

Hi!

New here

I have a question that I hope someone can help me with.

I have applied Beckers coarse filler on a concrete wall. Will it work to apply tiles on it afterwards?
It seems to have adhered well to the surface.

Regards

 

[Pagno]

Gladly, a bit more information about the wall. Is it cracks you have filled or old plaster that has come loose? Of course, it is possible to tile on plaster/spackle. Is it a wet room, kitchen wall, or something else?
Hello and welcome, by the way!

 

[54321]

There have been tiles there previously in a kitchen. So it was a bit rough and porous. Perhaps light concrete? In hindsight, maybe one should have used house fix or something similar?

Thank you very much!

 

[Stefan N]

There should be cement-based filler under tiles.

 

[54321]

There should be cement-bound filler under the tiles.

Yes, I've realized I've made a mistake now.
But does it work, or is it just better to try to tear it down?

 

[54321]

I'm very confused now. The surface is approximately 150x30. How big is the chance that it will release?

 

[Stefan N]

Quite small, I would think.

 

[oceanis]

The biggest risk is that the spackel is certainly not waterproof, and that a wet adhesive will dissolve the surface of the spackel with poor adhesion. But this is just a qualified guess without studying the properties of the spackel in detail.

 

[Stefan N]

Apply a primer beforehand.

 

[54321]

The biggest risk is that the spackling paste is certainly not waterproof and that a wet adhesive dissolves the surface of the spackling paste with poor adhesion.
But it's just a qualified guess without studying the spackling paste's properties in detail.

Is a water-based spackling paste anyway.

http://www.beckers.se/produkter/inomhus/spackel-fog/spackel-grov

 

[54321]

Apply a primer first.

Okay, yes I was thinking of doing that, maybe I can also paint a layer with wet room paint first?

 

[54321]

Update!
I went and poked at it with a Morakniv and it was very loose. Large pieces fell off, so I will need to tear it down and use Husfix or something similar.