Prefab house vs. solid house - Please urgently need advice!!

The sub-construction installation should be between the 60mm insulation plus vapor barrier and the GK with at least 40mm.

I cannot really follow this explanation. Therefore, my request to parcus: Please include the problem you believe exists in this list: Wall structure climate wall 40 from outside to inside: scratch plaster - ETICS - GFP - 140 mm timber frame including 140 mm insulation - vapor diffusion retarder - GFP - 60 mm timber frame including 60 mm insulation (= part of the installation level) - GFP (= part of the installation level) Thank you!

@hephta

It is important that the thermal insulation does not become damp, neither from the outside through the plaster nor from the inside through condensation water. This primarily causes two problems: the ineffectiveness of the thermal insulation and the risk of mold in the insulation.

To avoid this, from the inside:

Vorwand:
12.5mm drywall ideally layered twice in a cross arrangement as a heat storage, preferably more
Pre-wall installation layer 3-4cm as battens depending on how many layers of drywall
(this is a cavity for cables, lines, sockets, switches, ...)

Wall:
Vapor barrier glued so that it also withstands a blow test
(so that no condensation water can penetrate the thermal insulation)
e.g. OSB board according to structural calculation (horizontal forces)
Wood studs with thermal insulation
e.g. wood wool board or similar as a finishing layer
Vapor diffusion retarder
(i.e. possible moisture can escape from the insulation but no moisture can enter)

Facade:
can now also be, for example, a ventilated batten again
Fiber cement board, wooden cladding, plaster carrier board with visible plaster, ...

I have had very good experiences with this over the years,
and the builder can also easily do the interior finishing or even the facade themselves,
without affecting the warranty of the wall.

Best regards

@ parcus: So you see a faulty wall construction in all Streif Haus walls?

Streif Haus has been installing ventilation systems "as standard" for several years, currently from Zehnder. Do you think these can prevent the internal moisture problem?
From the outside, are we therefore dependent on the tightness of the construction (i.e. without a vapor barrier) consisting of gypsum fiberboard, external thermal insulation composite system, and scratch plaster?
Is the current wall construction then not a (high) warranty risk for Streif Haus?

that may very well be the case that the ventilation system significantly contributes to the indoor air concept here.

Only recently Okal Haus and Streif Haus have been very susceptible in the past.
I can also understand that you want to save costs in manufacturing.

But when I then see that renopan has just specialized in this and is "exclusive partner of Streif Haus." (according to the homepage)

Then I keep my fingers crossed for you.

I would definitely take a closer look at the exterior wall on the north side shortly before the warranty period expires.

Best regards

I think cracks should no longer be an issue, large surfaces will certainly probably no longer be made with chipboard, especially indoors.

The biological reports I have do not only mention wood preservatives. The interior walls generally do not cause problems and are also made of wood.

But as you write, hopefully that belongs to the past.

You can also simply check at the sockets, since they are still in front of the vapor barrier. If anything, only the 60mm insulation from the inside can get condensation water.

I had already read that, yet I wonder what that is supposed to mean, since the houses do not have a ventilation system. I would rather have expected an identical wall construction, since the stud is ultimately the supporting structure. Damp insulation is useless,...

Best regards

So no cracking, but what should we then pay attention to on the north wall? Where does the moisture come from outside into the insulation? 30-year warranty on the construction, or another period?

So not only wood preservatives but also ...?