Revisions log for Answer #635
This is the answer to the question How do you fix a situation where the paving in the garage is sagging because of the car?
Revision 1
2022‑06‑05 10:15
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Initial text
Styrofoam insulation and then sheets of bitumen welded as a barrier. For a garage? As a patio it would work. But 2 tons on it (4 tires) would not work. Anything other than new construction would be unsatisfactory.
I would completely deconstruct. The ceiling to the basement should be airtight. A reasonable polystyrene, waterproofing and a floor slab on top. Then it will hold up.