Basement walls do not dry

Hello dear forum members, I hope someone can help us :confused: We excavated our basement walls about 3-4 weeks ago because we want to apply a new bitumen and sealing layer. But the walls just won't dry... :( According to the measuring device, in some places it is still OL, meaning over 40% moisture?! And the current humidity levels aren’t helping either.. The house was practically underwater because there was no drainage.. For years.. Even from the inside, the plaster was already crumbling in some places or there were water stains.. Now my question.. How do we get the walls dry ASAP? We already had to postpone the facade insulation (which also has to be done this year for [Kfw]) Would a dehumidifier that can be rented help? Or do these only dry the air in a room? Bitumen and sealing layer (this is a kind of compound that you trowel on) can only be applied once the walls are dry everywhere?! I hope someone can help us :o

Honestly, I think using a dehumidifier is a good alternative

After two and a half years, the basement will be dry as well.

Me too. I just hope that my answer could help someone.

Hi,

unfortunately, we already have a damp wall in the basement of our newly built house. I hope it is not a direct construction defect and that we don’t immediately have a huge construction site again. That is why we want to first test it with a dehumidifier to see if it might still be residual moisture from the construction. I hope I am in the right place with the dehumidifier question. It is clear that we want to use a dehumidifier, but we don’t know which type to choose. I have done a bit of research on the internet. There are somehow dehumidifiers, drying units, and adsorption dryers. Basically, we want to buy a good dehumidifier right away because we think it is always advantageous to have one. Can someone tell us which dehumidifier we should get? Many thanks in advance

Ranaja

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Hello,

I have removed the links, please observe the forum rules. Thank you very much!

Rhenish regards
Building expert

How long has the cellar been standing?
If the cellar has been standing for a while and only one wall is wet, it actually argues against residual moisture.

For our construction to dry, we had rented a dehumidifier. Normally, you don’t really need it after that. It served us well for 2 weeks and dried thoroughly.