Yesterday, the blower door test was conducted at our place. Unfortunately, we were not informed beforehand that it would take place. I find that unfortunate, and I would have liked to be present. In our documents, I only found a note that the test is required for KFW, but no specific regulation about it.
We are very satisfied with the general contractor, but still, I would have wanted to be there. At handover, we will receive a sheet without having been able to verify the values myself.
How much does a test initiated independently usually cost?
How did you handle this?
We are very satisfied with the general contractor, but still, I would have wanted to be there. At handover, we will receive a sheet without having been able to verify the values myself.
How much does a test initiated independently usually cost?
How did you handle this?
EveundGerd10 Oct 2015 20:47Bauexperte schrieb:
Good morning,
Could it possibly be that you are confusing something?
A blower door test no longer makes sense when the house is about to be handed over; two tests even less so 😉
Regards, BauexperteNo. That was indeed a final test at the end.
S
Sebastian7911 Oct 2015 06:41BeHaElJa schrieb:
An airtightness test was conducted before plastering started (same setup as a blower door test).I don’t quite understand this approach – without plaster, there is no airtightness. What is the purpose of such a test then? Do you already have vapor barrier/insulation under the roof?
We are building with a double-wall construction. There was noticeably no draft through the masonry, but there was a draft at one spot on the membrane to the roof. That had to be fixed afterwards. The lift-and-slide door also had a draft in the middle. However, this is probably due to the design. The idea was likely to have the windows and membrane checked before installing the drywall panels and plaster, as reworking would be difficult after that.
S
Sebastian7911 Oct 2015 09:25Yes, so what? A cavity wall isn’t actually more airtight... it’s rather less airtight since there’s no exterior plaster. You’re using calcium silicate bricks, right? A lot of air passes through the vertical joints... and you don’t check all of that just by hand?
Plaster is really worthless in terms of airtightness – what makes sense is to leave out the drywall panels, then you can easily do touch-ups.
Plaster is really worthless in terms of airtightness – what makes sense is to leave out the drywall panels, then you can easily do touch-ups.
B
Bauexperte11 Oct 2015 11:54EveundGerd schrieb:
No. That was actually a final test. Hmm...
I don’t really see the point of such a final inspection. How could any possible leaks found—according to the contractor—still be repaired cost-effectively at this late stage?
If you don’t mind me saying, I consider this procedure to be purely promotional 😉
Best regards, Bauexperte
EveundGerd11 Oct 2015 20:11I’m not upset with you. Our expert gave a similar argument. 😀
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