Vesalii

Vesalii t1_j5nzut6 wrote

Concrete that's thick enough does not let water through. A concrete slab is the default first layer over here:

Flooring (tiles in this case) Screed Insulation Concrete Plastic

The plastic is around 100 um thick and is only so water from the concrete doesn't go into the earth. To make sure the concrete cures correctly.

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