Damp basement from inside or outside?

  • Erstellt am 2021-05-16 09:34:11

basti009

2021-05-16 09:34:11
  • #1
Hello,

we have a house from 1971. The heating room can be seen in the picture. On the right is the chimney shaft - this was damp until January - leaking roof.

As a result, in the rooms above, the wallpaper in the area of the shaft was slightly damp in places.

In the basement, there was water standing about 0.5 cm a few times (the traces can be seen in the picture).

I never thought about the plaster peeling off on the exterior wall. I bought a moisture meter and measure 10-18% wall moisture at those spots. In the area of the chimney shaft on the floor, occasionally 20 percent or more.

Can I assume that the moisture comes from the chimney shaft and will dry out over the next months/years by sealing the leak on the roof?

Or could it theoretically be that, given the damage pattern, the moisture comes from outside and I have a bigger problem?

How should I proceed? Should I wait at first? What could happen in the worst case?

In the other basement rooms, the wall moisture is 5-10 percent, humidity just under 6 percent.

Thanks!!

 

hanghaus2000

2021-05-16 10:04:15
  • #2
As you can see from the efflorescences, this is a general problem. In my opinion, the sealing of the basement walls is inadequate. Have a specialist check it. A forum cannot do that. An on-site appointment belongs there.

Moisture in the basement is normal. More likely not yet a problem. But if mold forms, action should be taken immediately.
 

basti009

2021-05-16 10:11:01
  • #3


Do you mean the efflorescences on the floor? That came from the shaft and was fixed (roof renovation). The floor is completely dry now.
 

KingJulien

2021-05-16 11:02:45
  • #4
You hopefully mean under 60%?
 

basti009

2021-05-16 11:03:50
  • #5
Yes, 60 sorry I mistyped. Is a damp basement wall without mold a problem or can you leave it?
 

hanghaus2000

2021-05-16 11:06:04
  • #6

No, I mean the ones on the walls. Everywhere the paint is peeling off.
 

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