ᐅ Damp Walls in a New Basement Build – Construction Execution Error?
Created on: 18 Oct 2018 19:30
E
Earth2018
Hello everyone,
I’ll start chronologically:
Background: 3 weeks before day 0, the screed was “laid,” including in the basement.
The basement is a “white tank,” meaning the base slab is waterproof.
Day 0: I notice moisture rising on the plaster in some corners of the basement.
At that time, the plasterers were still fetching water in the basement. The suspicion was therefore a leaking hose or something similar.
Day 1: The underfloor heating is filled with water, so the water cannot be coming from the underfloor heating since it was empty beforehand. The pressure was also constant.
Day 2: The level of moisture on the walls has risen slightly.
Day 5: The underfloor heating is put into operation, including in the basement area with moisture. The hope was that the moisture would decrease due to the warmth.
Day 8: Moisture is still present...
It hasn’t rained since day 0 either...
What do you think? What could this be?
A construction fault? Or does it really take that long for the water to dry?
I’ll start chronologically:
Background: 3 weeks before day 0, the screed was “laid,” including in the basement.
The basement is a “white tank,” meaning the base slab is waterproof.
Day 0: I notice moisture rising on the plaster in some corners of the basement.
At that time, the plasterers were still fetching water in the basement. The suspicion was therefore a leaking hose or something similar.
Day 1: The underfloor heating is filled with water, so the water cannot be coming from the underfloor heating since it was empty beforehand. The pressure was also constant.
Day 2: The level of moisture on the walls has risen slightly.
Day 5: The underfloor heating is put into operation, including in the basement area with moisture. The hope was that the moisture would decrease due to the warmth.
Day 8: Moisture is still present...
It hasn’t rained since day 0 either...
What do you think? What could this be?
A construction fault? Or does it really take that long for the water to dry?
U
Ulrich Fuckert19 Oct 2018 19:56No, this does not mean that water is coming through the concrete slab. It simply means that you have water in the screed insulation layer. This water can also enter, for example, if a lot of water was carried around, allowing it to reach the screed insulation layer through the screed edge strip.
U
Ulrich Fuckert23 Oct 2018 06:32The longer moisture remains in the screed insulation layer, the higher the likelihood of mold growth.
schubert7924 Oct 2018 05:32Don't just work superficially with a dryer!