How do I know which plaster/paint has been used in the basement
What have you painted with, is it kalkfärg?
Hi!
I wonder if anyone can help me determine what type of paint I have in one of the rooms in my basement. The basement wall is masonry and plastered. On top of the plaster, there is some kind of thick paint, almost like a layer of filler. The surface is yellow but what resembles filler is white. The house was drained a year ago and there are no signs of moisture penetrating anywhere in the room, either before or after the drainage.
- The paint does not peel, it cannot be pulled off in sheets.
- Does not dissolve in water
- Dissolves a little when rubbed with a cloth with rubbing alcohol, but it takes time!
- Tried sanding with a sander - result: basically nothing happens, the surface just becomes smooth/glossy.
- Tried with an angle grinder with a rotating steel brush - result: the paint disappears like dust even though it takes a very long time to get through.
What could the wall be painted with?
/Niklas
I wonder if anyone can help me determine what type of paint I have in one of the rooms in my basement. The basement wall is masonry and plastered. On top of the plaster, there is some kind of thick paint, almost like a layer of filler. The surface is yellow but what resembles filler is white. The house was drained a year ago and there are no signs of moisture penetrating anywhere in the room, either before or after the drainage.
- The paint does not peel, it cannot be pulled off in sheets.
- Does not dissolve in water
- Dissolves a little when rubbed with a cloth with rubbing alcohol, but it takes time!
- Tried sanding with a sander - result: basically nothing happens, the surface just becomes smooth/glossy.
- Tried with an angle grinder with a rotating steel brush - result: the paint disappears like dust even though it takes a very long time to get through.
What could the wall be painted with?
/Niklas
Joining this thread instead of creating a new one...
Planning to repaint (initially) a section of a basement wall due to the installation of ventilation pipes (would like to paint behind it before it's installed). The basement as a whole has a few "peels" but is situated on a sand/gravel ridge and on a steep slope, so it's naturally drained.
Bought silicate paint but understood that all old paint must be removed for it to work. The location I'm working on is an interior wall and a basement wall that stands above ground except for the bottom 10cm. The other walls (which I won't paint now) are also interior walls. So, the moisture issue is basically zero in this space.
The current color scheme is orange, apricot, light yellow, and gray (slightly different on various wall sections), leading me to believe it was painted in the 70s-80s (some older walls in small basement spaces probably haven't been painted in 70 years, so they are likely not the biggest problem). I'm guessing it's plastic paint? Except for small local damages, the paint is very firmly attached...
My thought is, should I invest in fixing up this entire space "correctly" with silicate (approximately 25 square meters, I guess) and paint with something other than silicate that can cover the presumed plastic paint... Of course, I would scrape off everything that's loose... Or is this just going from bad to worse? If it turns out not to work, it might be a nightmare project compared to biting the bullet now and scraping it off. In half an hour, I managed to scrape clean about 3 square decimeters. It didn't work well with an angle grinder, better to just scrape.
The space is a garage/hobby room with no requirement for a perfect finish but I still want it to be "light and fresh".
For instance, does Biltema's masonry and plaster paint work over both plaster, concrete, and firmly adhered plastic paint, assuming we’re talking about adhesion (the moisture issue, as I said, I do not believe is a problem here...)
Planning to repaint (initially) a section of a basement wall due to the installation of ventilation pipes (would like to paint behind it before it's installed). The basement as a whole has a few "peels" but is situated on a sand/gravel ridge and on a steep slope, so it's naturally drained.
Bought silicate paint but understood that all old paint must be removed for it to work. The location I'm working on is an interior wall and a basement wall that stands above ground except for the bottom 10cm. The other walls (which I won't paint now) are also interior walls. So, the moisture issue is basically zero in this space.
The current color scheme is orange, apricot, light yellow, and gray (slightly different on various wall sections), leading me to believe it was painted in the 70s-80s (some older walls in small basement spaces probably haven't been painted in 70 years, so they are likely not the biggest problem). I'm guessing it's plastic paint? Except for small local damages, the paint is very firmly attached...
My thought is, should I invest in fixing up this entire space "correctly" with silicate (approximately 25 square meters, I guess) and paint with something other than silicate that can cover the presumed plastic paint... Of course, I would scrape off everything that's loose... Or is this just going from bad to worse? If it turns out not to work, it might be a nightmare project compared to biting the bullet now and scraping it off. In half an hour, I managed to scrape clean about 3 square decimeters. It didn't work well with an angle grinder, better to just scrape.
The space is a garage/hobby room with no requirement for a perfect finish but I still want it to be "light and fresh".
For instance, does Biltema's masonry and plaster paint work over both plaster, concrete, and firmly adhered plastic paint, assuming we’re talking about adhesion (the moisture issue, as I said, I do not believe is a problem here...)
...adding a question... is it because the silicate paint needs to be diffusion-open that all the old paint must be removed, or does it peel off from other paint? Because if it just sticks, then it feels like the right way would be to paint everything with silicate and work to remove as much as I can, but not all 100% of the old paint, because that must be a hellish job...