ᐅ Insulating Basement Walls from the Inside Using Panels

Created on: 26 Sep 2022 19:40
J
jk-4570
J
jk-4570
26 Sep 2022 19:40
One basement room with three exterior walls and one wall adjoining other basement rooms is intended to be used as a workshop.
One exterior wall is against the soil, and the other two are exposed.
I want to insulate and cover the exterior walls from the inside, meaning 4 cm (1.5 inches) thick battens attached to the wall, insulation in between, and OSB boards as the final layer.
What kind of insulation should I use?
Should I install a vapor barrier between the insulation and the OSB?

Or is this approach completely wrong?
So many questions...

Thanks and best regards
i_b_n_a_n26 Sep 2022 19:51
Is there already insulation on the exterior walls? (Perimeter insulation / XPS / EPS / “Styrofoam” boards)
If not, meaning only a protective coating against moisture, you would shift the dew point, but in my opinion this is negligible for a concrete basement.

For a masonry basement, it depends on the type of brick and possibly the further wall construction.

I would still only use moisture-resistant material for interior insulation. Additionally, the basement should then be kept at least slightly heated and ventilated on a permanent basis.

The points described above are based solely on my personal experience, so just a layman’s opinion!
Incorrect insulation usually leads to major building damage (mold, etc.), so it’s better to consult experts who can provide knowledge, not just opinions. ;-)
B
Benutzer 1001
26 Sep 2022 20:32
Our basement is insulated both inside and outside with aluminum foil-faced insulation material, followed by battens, additional polystyrene insulation in between, and then drywall.

Innenraum einer Baustelle: silberne Isolierplatten mit grünem Klebeband, linke Türöffnung.