The construction is in Romania. Here we have other rules than in Sweden. Stone is used to break the capillary and not infiltrate water in the house, the foam is for thermal comfort.
@bigram13 i am curious about how do you do it in Sweden ?
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So I am in the United States, we use concrete slabs here. Where I am at we do not have ground water issues. That is pretty cool. How log does the foam last, does it start to break down?
The foam last forever i guess ,basically the ground underneath the foam is settling down and is creating a space of air which is an additional izolator.