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
Platzhirsch8520 Aug 2019 21:24These Wedi boards seem to me to be a viable solution.
We have a similar issue in another area, but there, manual re-plastering is not 100% feasible. Therefore, re-plastering cannot be the sole solution.
The plasterer suggests installing a vapor retarder inside the boxed-in area. However, it is questionable how well this can be attached to the plaster.
If the joint edges between the Wedi boards and the plastered wall are properly jointed, then doesn’t this create the airtight layer?
We have a similar issue in another area, but there, manual re-plastering is not 100% feasible. Therefore, re-plastering cannot be the sole solution.
The plasterer suggests installing a vapor retarder inside the boxed-in area. However, it is questionable how well this can be attached to the plaster.
If the joint edges between the Wedi boards and the plastered wall are properly jointed, then doesn’t this create the airtight layer?
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