The house was built in '49, brick with a plastered facade - I have checked the materials there, but what on earth is the basement wall made of?
When I knock on the basement wall, it sounds hollow, not solid like when I knock on the brick wall. When I drill into the basement wall, it's very porous - I have trouble getting the plug to not spin when I tighten the screw.
I suspect it's the same material above the windows, as it behaves similarly...
Does anyone have a qualified guess? (I'm interested in the load-bearing capacity in terms of screw fastening, etc., whether I should completely abandon the idea of wall-mounted shelves...)
When I knock on the basement wall, it sounds hollow, not solid like when I knock on the brick wall. When I drill into the basement wall, it's very porous - I have trouble getting the plug to not spin when I tighten the screw.
I suspect it's the same material above the windows, as it behaves similarly...
Does anyone have a qualified guess? (I'm interested in the load-bearing capacity in terms of screw fastening, etc., whether I should completely abandon the idea of wall-mounted shelves...)
How porous is it??
Concrete blocks are concrete with holes in them, so if you hit where there is no hole, it's very hard. In my house, there's träullit on the inside as insulation. Check here http://www.traullit.se/ This is then plastered and definitely sounds hollow.
Concrete blocks are concrete with holes in them, so if you hit where there is no hole, it's very hard. In my house, there's träullit on the inside as insulation. Check here http://www.traullit.se/ This is then plastered and definitely sounds hollow.