[mrweasel]

> It is interesting that you insulate under the house.

Isn't that pretty normal, I mean maybe not three meters down, but modern foundations are required to be isolated in many places. The legal requirement in Denmark is at least 300mm of isolation under the house.

[8fingerlouie]

And that's not a new thing either.

In my 1970's house we have 150mm insulation under the house from the original build, 150mm in the walls and 200mm on the roof.

We added another part to the house a few years ago, and that was 300mm insulation in floor/walls/roof. Since the walls are made of brick with a depth of 7cm, it means the walls are 7+7+30= 44cm thick (plus some "slack")

Even my 1980's summerhouse has 100mm insulation in floor/walls/roof.

[jmrm]

That depends of the the place where you live. In middle to the south of Spain, the floor of houses are normally made of marble (or other ceramic material) slabs on top of a little layer of some glue cement, on top of the armoured concrete slab foundation, but on the north is a lot common to have wooden floors with air chamber of a similar size.

[kitd]

It is indeed normal. I mentioned it by way of an intro to the unusual alternative I saw.