Hello,
Today, a vapor barrier was installed on the concrete slab in the basement, followed by the insulation boards and the fixing panels for the underfloor heating.
The construction management specification states the following:
A vapor barrier resistant to moisture diffusion will be installed and either welded or sealed throughout the entire basement (manufacturer: KNAUF type Katja or equivalent).
Since the workers behaved very unprofessionally (deep scratches in the fresh plaster, a door handle ripped off, bottles missing, a pallet taken away...), I felt the need to check whether the vapor barrier had actually been installed under the insulation boards. So, I lifted one panel and looked underneath the insulation. The black vapor barrier was there, which is good news. However, it was only overlapping by about 10cm (4 inches) and was not sealed or welded, at least in that spot. The long seam, however, was sealed. Now the question is what to do. Is it problematic if the vapor barrier overlaps but is not sealed? In this way, it is not vapor-tight. Would it be worth removing everything to fix this? Or is this considered a minor issue?
Today, a vapor barrier was installed on the concrete slab in the basement, followed by the insulation boards and the fixing panels for the underfloor heating.
The construction management specification states the following:
A vapor barrier resistant to moisture diffusion will be installed and either welded or sealed throughout the entire basement (manufacturer: KNAUF type Katja or equivalent).
Since the workers behaved very unprofessionally (deep scratches in the fresh plaster, a door handle ripped off, bottles missing, a pallet taken away...), I felt the need to check whether the vapor barrier had actually been installed under the insulation boards. So, I lifted one panel and looked underneath the insulation. The black vapor barrier was there, which is good news. However, it was only overlapping by about 10cm (4 inches) and was not sealed or welded, at least in that spot. The long seam, however, was sealed. Now the question is what to do. Is it problematic if the vapor barrier overlaps but is not sealed? In this way, it is not vapor-tight. Would it be worth removing everything to fix this? Or is this considered a minor issue?
G
Grantlhaua20 Sep 2019 23:27Nordlys schrieb:
15? More like 5.You won’t get a cartridge of Katja Sprint Anschussfix for 5€...
saibot schrieb:
The door handle was ripped off in the fresh plaster,At what stage is it still possible to check underneath the screed?
So, yesterday morning the head of this company came by and looked at it with me. He was friendly and explained his point of view. According to DIN standards, the bitumen membrane only needs to overlap. The long edges are glued, only the end joints are not glued but just overlapped. He said that the weight of the screed will press the membranes together enough to prevent any issues. At the walls, the membranes are shaped like a tray, turned upwards and overlapping with the cavity wall damp-proof course. From his perspective, everything is fine.
The site manager also thinks it’s okay. The underfloor heating was already installed yesterday, so now it’s simply not possible to make any changes. Gluing it myself isn’t feasible given the tight schedule.
So… I don’t think anything will happen. The long edges are glued, and there shouldn’t really be many end joints anyway. Still, from my non-expert perspective, this isn’t exactly what the scope of work specifies.
The site manager also thinks it’s okay. The underfloor heating was already installed yesterday, so now it’s simply not possible to make any changes. Gluing it myself isn’t feasible given the tight schedule.
So… I don’t think anything will happen. The long edges are glued, and there shouldn’t really be many end joints anyway. Still, from my non-expert perspective, this isn’t exactly what the scope of work specifies.
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