Hello,
In the basement, a floating cement screed from Knauf was installed. After 5 months, we still have a residual moisture level of 5% – which is far too high.
According to an expert from our Building Owners' Protection Association, there are three possible reasons:
1. The measuring device is faulty (although nothing can be completely ruled out)
2. Insufficient heating and ventilation were provided
3. The waterproof slab is not actually watertight.
The slab is made of waterproof concrete (WU concrete), as is the entire basement, with an additional black tank waterproofing membrane coated with KMB on the outside. During the groundwater lowering, a pump temporarily failed, but the suction was not fully disconnected yet (according to the dewatering company). Therefore, I don’t believe the slab is the issue. Especially since our site manager has experienced drying problems on other construction sites as well.
What do you think?
Regards,
StarAce
In the basement, a floating cement screed from Knauf was installed. After 5 months, we still have a residual moisture level of 5% – which is far too high.
According to an expert from our Building Owners' Protection Association, there are three possible reasons:
1. The measuring device is faulty (although nothing can be completely ruled out)
2. Insufficient heating and ventilation were provided
3. The waterproof slab is not actually watertight.
The slab is made of waterproof concrete (WU concrete), as is the entire basement, with an additional black tank waterproofing membrane coated with KMB on the outside. During the groundwater lowering, a pump temporarily failed, but the suction was not fully disconnected yet (according to the dewatering company). Therefore, I don’t believe the slab is the issue. Especially since our site manager has experienced drying problems on other construction sites as well.
What do you think?
Regards,
StarAce