I am renovating a room in the basement and plan to break up the existing floor, dig down, insulate + add heat sources, and then pour concrete again.
The floor is in an extension from 1978 and measures 4×4 meters.
I read that certain types of floors are not suitable for this as they can be a load-bearing part of the house. What do you think, can this floor be broken up? Below is a picture from the building permit of 1978.
I made a small test hole a bit in from the outer walls and measured about 20 cm of concrete. From what I can read from the picture, the floor should be 300 mm. Isn't that quite substantial even though I could only measure 'just' 200 mm?
A bit blurry image but doesn't it say 100 mm concrete slab and that it's the edge beam that's 300 mm? It's at least more reasonable than the entire slab being 300 mm thick, otherwise, the edge beam would be about 900 mm thick.
The floor is located, as a whole, about 150 cm below ground level. The room is intended as a various-hobby-room. As of now, the floor is freezing cold.
Does it say 100 mm? Yes maybe, the picture is hard to read...
But since there are edge beams that support the walls, one could reasonably break away the floor. It shouldn't be carrying anything, right?
I want to end this thread. I realize that my question regarding whether the floor was suitable for breaking up was a bit difficult to understand. Mainly wanted to know if there were any general risks when breaking up floors, such as wall instability, etc.
Anyway, the work is now complete. Breaking up, 20 cm insulation, casting, electric heated floor, empty pipes for future change to waterborne floor heating. 16 m2 in Stockholm. 75' after ROT if anyone wants to know for their own comparison.
