We are currently renovating our house and are tearing down walls and excavating the basement to furnish an apartment there. The house is located on the west coast and is built on rock with a granite foundation, parts of which are below ground level but have a Platon mat and gravel against the rock on the outside, see attached pictures.
When I tore down the interior walls, I found the construction solution you see below, and as you can see, it has been affected by mold.
What do you recommend for the construction solution for the new interior walls against the granite wall?
