Choice of Ventilation Solution for Flat Roof

Jojak91 · 2023-09-24T16:34:44+00:00

We have just erected the frame of our house, and the initial plan was to go with Isover’s unventilated roof construction using their variable vapor barrier Isover Vario Extra. See solution: https://www.isover.se/snedtak/oventilerad-konstruktion#diffusionstatt-yttertak We have now started wavering in our decision and are considering an air gap instead. The construction is in Skaraborg, the roof has a 45-degree angle and is barely 200m2 facing west/east. There is no shading from trees and the house is located in an open landscape, which means almost constant wind. We are looking for input, what is a sensible construction solution based on these conditions? We have read various studies that point in all possible directions. Attached are pictures of the roof trusses and their design.

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sepani

#16

Member · skåne

· 2 681 posts

4 Aug 2025 at 1:46 PM

sepani

Member

skåne
2,681 posts

4 Aug 2025 at 1:46 PM

T Torsten234 said:
Aha! So then there was a ventilated space between the outer roof and the insulation through the gable vents?

👍 absolutely

Choice of Ventilation Solution for Flat Roof

sepani

sepani

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