SGU says it is located on the border between "postglacial fine sand" and "glacial river sediment, sand", quite close to the coast in Skåne. The area is completely flat. Sills not replaced, no dampness observed. Original drainage:
Could one sometime in the future, if/when tired of cold floors, install water-based underfloor heating? Embedded in something like self-leveling compound on top of the reinforced concrete slab. I assume one should replace the sills before doing something like that.
Are you planning to heat your home with underfloor heating?
Do you want warm floors or just not ice-cold ones?
Of course, it's possible but the question is what the cost for this will be.
Everything that contains still air insulates, i.e., lecakulor insulate and are completely insensitive to moisture. If you heat the floor, you get a condensation point that lies somewhere in the leca layer. Any moisture "stays" there, but if the moisture comes from below, you will likely also have moisture that migrates upwards but does not condense (wood floors are then risky). If the moisture comes from above, it is almost risk-free in my opinion.
But now you must know if there is any moisture underneath. Which actually takes 1 year to find out. A quick check is to lay a plastic film on the floor and see if the moisture level under the film changes.
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