Problem with base plaster - microcracks?

  • Erstellt am 2020-03-24 08:22:30

Baraja

2020-03-24 08:22:30
  • #1
Hello everyone,

I am facing a puzzle – and unfortunately, our site manager is too. The base plaster was applied during last summer. It was quite hot back then. At first, everything was fine. After a while, these whitish discolorations appeared. We complained to the plasterer and he painted over it again. But that only lasted a few days.

Now the questions are: Does anyone know where this could come from? And what might need to be done about it? Should I get an independent building expert?

Unfortunately, I do not know which plaster and paint were used, but I will ask the plasterer.

 

Baraja

2020-03-27 10:12:51
  • #2
I now have the information about the plaster and paint. Knauf Sockel Lup was used as lightweight plaster. The paint was Knauf Autol Premium Siliconharz- Fassadenfarbe mit Selbstreinigungs-Effekt
 

bauenmk2020

2020-03-27 10:22:47
  • #3
Do you have a photo of the same spot during the shell construction / without plaster? What kind of masonry do you have? It somehow looks like a liquid is seeping out through gaps (joints) and blooming there.
 

Vicky Pedia

2020-03-27 11:05:44
  • #4
well actually the floor slab should be there
 

borderpuschl

2020-03-27 11:07:48
  • #5
Looks like the plaster is efflorescing, but the pattern does look strange. Is there no base seal on it at all?
 

Baraja

2020-03-27 13:34:19
  • #6
We built with Poroton. There is a red rubber-like substance used as sealing on it.
 

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