Maverick911
2018-01-19 13:01:44
- #1
Hello everyone,
I have the following problem. I bought an old house 10 years ago and added an extension to it. The extension is built with 36 Liapor bricks, on which a cement plaster (mixed by myself) and a silicone resin paint from Maxit with a primer from Maxit were applied. On the old house, a renovation plaster from Maxit including mesh was used and an associated primer with quartz sand (the same was also used for the extension). Then a Maxit silicone resin paint.
After only 2 - 3 years, paint started to flake off on a wall area of about 5 m², which completely came off including the primer. I then scraped off all loose parts and painted over it with a primer, a normal primer without quartz sand. This held for about 2 years again, then although the newly painted parts adhered to the wall, where there was still old paint underneath, it then loosened. By the way, there are slight hairline cracks that follow the joints and the wall is exposed to driving rain.
Since we wanted to repaint everything completely after 10 years, I asked a painter what I could do, and he recommended filling larger unevennesses (which resulted from multiple paintings) and then painting with a primer that is supposed to bridge slight cracks. I also partially painted two other walls with this, which also had some flaking or hairline cracks. I then primed the entire house and painted it with the paint recommended and purchased by him. When asked whether it matters which paint system is underneath, he said it does not matter as long as it is primed.
Now it is flaking off even faster; in the second winter about 30% of the paint on the 5 m² wall has already come off and I would say another 50% is completely detached and still falling off. On another wall, this is now also starting. On both walls, hairline cracks can be seen following the joints. And both walls were painted with the coating that was actually supposed to bridge the cracks.
What I also noticed is, at the spots where the paint detached, there is ice behind it in appropriate weather conditions, and when it thaws, water drops even come out of the visible hairline cracks.
My suspicion is that moisture comes into the plaster due to the cracks, which can no longer escape because of the new paint build-up and thus condenses between the plaster and paint and leads to flaking in frost. The cracks are caused by the plaster structure, as it does not harmonize with the masonry?
Remote diagnosis is difficult but has anyone seen anything like this?
What possible solutions are there
Thanks!
Regards Stephan
I have the following problem. I bought an old house 10 years ago and added an extension to it. The extension is built with 36 Liapor bricks, on which a cement plaster (mixed by myself) and a silicone resin paint from Maxit with a primer from Maxit were applied. On the old house, a renovation plaster from Maxit including mesh was used and an associated primer with quartz sand (the same was also used for the extension). Then a Maxit silicone resin paint.
After only 2 - 3 years, paint started to flake off on a wall area of about 5 m², which completely came off including the primer. I then scraped off all loose parts and painted over it with a primer, a normal primer without quartz sand. This held for about 2 years again, then although the newly painted parts adhered to the wall, where there was still old paint underneath, it then loosened. By the way, there are slight hairline cracks that follow the joints and the wall is exposed to driving rain.
Since we wanted to repaint everything completely after 10 years, I asked a painter what I could do, and he recommended filling larger unevennesses (which resulted from multiple paintings) and then painting with a primer that is supposed to bridge slight cracks. I also partially painted two other walls with this, which also had some flaking or hairline cracks. I then primed the entire house and painted it with the paint recommended and purchased by him. When asked whether it matters which paint system is underneath, he said it does not matter as long as it is primed.
Now it is flaking off even faster; in the second winter about 30% of the paint on the 5 m² wall has already come off and I would say another 50% is completely detached and still falling off. On another wall, this is now also starting. On both walls, hairline cracks can be seen following the joints. And both walls were painted with the coating that was actually supposed to bridge the cracks.
What I also noticed is, at the spots where the paint detached, there is ice behind it in appropriate weather conditions, and when it thaws, water drops even come out of the visible hairline cracks.
My suspicion is that moisture comes into the plaster due to the cracks, which can no longer escape because of the new paint build-up and thus condenses between the plaster and paint and leads to flaking in frost. The cracks are caused by the plaster structure, as it does not harmonize with the masonry?
Remote diagnosis is difficult but has anyone seen anything like this?
What possible solutions are there
Thanks!
Regards Stephan