Tushan79
2022-01-07 16:37:54
- #1
Try Primur 600ml, my drywall installer uses something like that for every vapor barrier "piercing" pipe etc.. That might also solve your problem.
How far is the substructure under the rafters planned? Looking at picture 3, it should be at least 75mm (I assume DN75 ventilation pipes?!) ideally it would certainly go through the rafters (STRUCTURAL PROBLEM, don’t do that) or similar to picture 1 over the rafters. From above (since the attic is unused, not really relevant) it wouldn’t look so nice but would be good for the ceiling height.
We are flexible with the substructure, 10cm were originally planned, thus enough space for the 75 pipes, max 14cm would theoretically be possible, so we would still have 2.56m room height.
Pipes over the beam would be suboptimal for two reasons:
[*]The attic above should possibly be developed at some point, so the pipes would be disturbing
[*]to my knowledge the pipes should never run through the cold layer