ᐅ Wall construction of prefab house manufacturers: Are they vapor permeable?

Hello,
I have a question regarding the wall construction of timber frame houses.
For example, the company Allkauf Haus advertises the wall’s "unmatched breathability," even though rigid foam insulation and a PE (polyethylene) vapor barrier are part of the wall structure.
A wall with a PE vapor barrier can’t really breathe anymore, can it?
Thank you!
Best regards,
Rainer

No matter which wall construction you choose, walls do not breathe. The idea of breathable houses comes from a time when windows were drafty. Today, a plaster can absorb and release a minimal amount of moisture (ideally: clay plaster); everything else is just marketing jargon.

Rafi911 schrieb:

We want to sell our old house and build a new one with that money, plus a small loan.
Option A: Sell the old house and pay for the new house or land from it. Risk: Inflation or loss of value between the sales?
Option B: Short-term financing (if that exists) + build the new house, then sell the old house
Option C: ???

Rafi911 schrieb:

For example, the company Allkauf Haus advertises "unmatched breathability" of the walls,

I interpret the current situation as "the new land isn’t secured yet" – that would be a very wrong time to commit to a specific construction method or even a particular builder (I almost said general contractor, but that wouldn’t be a turnkey builder anyway). Design should not come before land, and builder selection should not come before design. Why a new house at all?

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https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/

11ant schrieb:

I interpret the current situation as "the new plot isn’t secured yet" – this would be a very wrong time to commit to a construction method or even a specific builder (I almost said general contractor, but that wouldn’t apply to a self-builder). Design should not come before securing the plot, and selecting a contractor should not come before the design. Why build a new house at all?

Yes, that's right, the plot is not finalized yet... of course, you only decide once you have a valid building permit / planning permission.
The old house has simply become too large for me...