Hi!

Tearing down an old storage and pantry in the basement.

The house was built in 1942 and unfortunately, there is no information on whether it has been drained, and I want to keep costs as low as possible due to mortgage rates and everything.

We want to have a smooth concrete wall with white silicate paint.

Aside from drainage, what would be the next step?

Any help is appreciated!

Best regards, Sebastian
 
  • Basement renovation showing an old storage room with exposed concrete and unfinished walls, tiles on the floor, and various construction tools.
  • Old basement storage room with bare concrete walls, a small window, wooden frames, tiles, and tools lying on the floor, prepared for renovation.
I would have tried to knock down the plaster that is loose at the bottom and then plaster with lime mortar where it has come off. Then painted with breathable paint.

A rule of thumb is that the plaster mortar should not be harder than those that are there now.

Edit, completely smooth is difficult like basement walls in houses from later years. Then all the plaster must be removed and redone. Almost time to bring in professionals with experience then.
 
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Claes Sörmland
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Plastering is not so difficult to learn if you have a bit of patience, there's a lot available online. Then the plaster needs to sit for a while (I believe it was at least a month) before you apply the silicate binder and then the silicate paint. I have used Hornbach's paint with good results if you follow the instructions carefully.
 
Thanks for all the tips! Now I've knocked it down to the foundation. I suspect there was lime plaster because it was very porous.

My gut feeling is to go with lime plaster and nothing with cement in it. It dusts like crazy when I brush it, so it will be a huge job to get it completely clean on the walls.

What do you recommend?
 
  • Interior room with exposed brick walls, an open door leading outside, visible wiring, and a bucket with tools on the floor.
  • Bare brick wall with remnants of loose, porous plaster, reflecting a renovation project focused on replastering with lime plaster.
  • A bare concrete wall, partially cleaned, with a small window above and tools on the floor. A renovation project in progress with evident dust and debris.
Why not paint directly on that? - Just a suggestion.
 
Looks good. You can use a wire brush on an angle grinder and go over the walls. Lots of dust. Then start over and plaster with any mortar you choose. If you choose a KC mortar, it might be a bit more durable in the long run. If there is a floor drain, it might be a good idea to wash down the rest with plenty of water. If there is moisture penetration and you're not up for dealing with external insulation and drainage right now, it can be good with a thin base coat with plaster A and then B on that. If it's dry as it is, A+C can be good. You might need to mesh around windows, corners, and doors.

Alternatively, apply lime plaster on what you have.

Regarding painting – silicate is probably good, but a lime paint or KC paint can be cheaper. And faster. Guaranteed moisture-resistant.
 
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