Hello,
A seventies semi-detached house with a basement floor built according to the method of the time with internal insulation against wall and slab requires some care after nearly 40 years in mothballs.
Despite the construction method, the house has fared quite well over the years. It's almost incredible that enclosed studs behind a vapor barrier directly against filled concrete walls have remained completely intact after all these years.
Now to the point. A larger part of the gable has a concrete wall where approximately 6 meters are entirely above ground, with only a small part underground. The wall consists of 15 cm cast-in-place concrete (i.e., ice-cold) with internal insulation of 95mm between wooden studs, followed by a vapor barrier and plasterboard. A bedroom has this wall entirely above ground along one side, and after removing the skirting board, an unpleasant odor was revealed from the sill along the concrete wall. This insulation, as well as the studs and sill, need to be removed.
What I wonder about is the appropriate measure to restore the wall? External insulation is unfortunately not possible on this part.
My skilled carpenter and house doctor prescribe from outside to inside: concrete wall, 25 mm air gap, 70 mm foam insulation between 70 mm metal studs, vapor barrier, and plasterboard. The air gap is not ventilated. Any moisture is absorbed by the concrete slab or wall, and the air always circulates somewhat due to the house's construction.
I was thinking: concrete wall, 40-50 mm foam insulation directly against the concrete wall, another layer of foam insulation between 45 mm metal studs, vapor barrier, plasterboard. See, for example, Finja's climate wall without air gap:
http://finja.se/App_Resource/Page/file/prefab/pdf/sv/7001.pdf#view=fit
I'm probably voting for the carpenter's suggestion. What does the collective expertise of this eminent forum think?
Grateful for answers
