New construction 2014: Problems with high humidity in the basement

  • Erstellt am 2015-07-08 13:06:22

Lumpi_LE

2015-07-13 08:17:19
  • #1
here there is certainly a construction defect (sealing) in the area of the wall transitions, with simultaneously pressing water... it already starts with the fact that you completely welded off a WU concrete slab? A building expert will help. As for ventilation, as just mentioned: If you ventilate your 16° cellar in summer, it will inevitably become more humid...
 

Maestro1983

2015-07-14 06:45:44
  • #2


hello lumpi_LE,

we have completely welded the floor slab with bitumen membrane. On top of that, the masonry was built. In the first row of bricks, another foil was inserted. On the outside, we applied the thick coating down to the underside of the floor slab. I (in my opinion) could therefore exclude pressing water as the cause. Even after two weeks of dry weather, the humidity simply does not drop. After turning off the dehumidifier, we are immediately back at about 75% within an hour. A building expert has already been commissioned. He is trying to make it this week. Hope he brings clarity!!
 

Maestro1983

2015-07-14 07:03:43
  • #3


morning wrobel,

I ventilate less often during the summer time. mostly late in the evening or early in the morning. then I open all the basement windows fully for about 15 minutes. I make sure that the outside temperature is about 5 degrees below the basement temperature and that the outside humidity is also significantly lower.

but I have probably also understood that one should compare the outside temperature with the wall temperature. but if that is only around 10-15 degrees, you can hardly ventilate in summer...

I have not ventilated for the last 6 days and have been running the dehumidifier. I have 78% as the maximum value in the hallway in the basement.
 

bernie

2018-11-06 18:24:35
  • #4
since unfortunately nothing more came from the thread starter here: How did the matter continue? What did the expert say???
 

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