Hello everyone,
We are currently having a house built by a general contractor (external wall structure: aerated concrete - mineral wool - brick veneer). At the moment, the plasterer is working inside (walls are being coated with lime-cement plaster). Some pipes run surface-mounted in room corners and are planned to be later covered with drywall panels (e.g., flue pipe for the gas heating system).
Currently, there is no plaster behind these pipes. The aerated concrete is visible (see photo).
So far, I have assumed that the internal plaster forms the airtight layer on the external walls. For the same reason, socket and switch boxes in the external walls were fitted with airtight membrane boxes. This seems to be counterproductive if large areas behind surface-mounted pipes lack internal plaster. In my opinion, the drywall cannot take over the function of airtightness, can it?
The issue of plastering walls behind pipes probably exists on almost every construction site. How is this usually resolved?
We are currently having a house built by a general contractor (external wall structure: aerated concrete - mineral wool - brick veneer). At the moment, the plasterer is working inside (walls are being coated with lime-cement plaster). Some pipes run surface-mounted in room corners and are planned to be later covered with drywall panels (e.g., flue pipe for the gas heating system).
Currently, there is no plaster behind these pipes. The aerated concrete is visible (see photo).
So far, I have assumed that the internal plaster forms the airtight layer on the external walls. For the same reason, socket and switch boxes in the external walls were fitted with airtight membrane boxes. This seems to be counterproductive if large areas behind surface-mounted pipes lack internal plaster. In my opinion, the drywall cannot take over the function of airtightness, can it?
The issue of plastering walls behind pipes probably exists on almost every construction site. How is this usually resolved?
P
Platzhirsch8523 Aug 2019 21:45We have the problem in three areas:
1. Waste vent pipe
2. Flue pipe of the gas heating system
3. Toilet ventilation plus two flexible pipes for the solar thermal system
According to the site manager, neither the drywall installer nor anyone else should wrap a membrane around the pipe and then stick this membrane to the plaster on both sides of the pipe.
My concerns: In the ceiling and floor areas, the airtight layer is not complete...
1. Waste vent pipe
2. Flue pipe of the gas heating system
3. Toilet ventilation plus two flexible pipes for the solar thermal system
According to the site manager, neither the drywall installer nor anyone else should wrap a membrane around the pipe and then stick this membrane to the plaster on both sides of the pipe.
My concerns: In the ceiling and floor areas, the airtight layer is not complete...
G
Grantlhaua30 Aug 2019 08:25Guys, guys, guys... What would they have done 20 years ago?
Just plaster that corner a bit (doesn't have to look perfect) and then box it in with drywall. That way, it will be airtight for your blower door test and done.
Just plaster that corner a bit (doesn't have to look perfect) and then box it in with drywall. That way, it will be airtight for your blower door test and done.
Grantlhaua schrieb:
Guys, guys, guys,... What would they have done 20 years ago?The same thing, see the Thermal Insulation Regulation from 1995, §4...
G
Grantlhaua30 Aug 2019 09:07Dr Hix schrieb:
The same applies, see the Thermal Insulation Regulation of 1995, §4...
And even there, the corner has just been a bit pushed out.
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