Framework for energy-efficient house, double sill etc?

[tobbew]

Hello

I'm in the process of renovating the house as well as expanding it and trying to make it an energy-efficient house.
I have 50cm thick walls in the drawings, but I might consider reducing them a bit if it seems difficult to get a reasonable payoff.

In any case, the slab will soon be cast for the underfloor heating to be installed, and then the wall thickness becomes important...

How do people usually do it? Do I make two sill plates, one for the inside and one for the outside that are disconnected from each other, and then fill in between with insulation?

I've seen that there are both connected walls (with steel straps and the like) and completely separate interior walls from exterior walls. I'm a bit unsure about what's wise. It feels more stable if they are connected, but that might not be a wise reasoning.

Thanks for the tips.

 

[vectrex]

The insulation manufacturers usually have some examples on their websites.

In general, one could say that two completely separate walls provide the best insulation value as they break all thermal bridges.

Personally, I would frame with standing 170 studs as the load-bearing wall. An additional 70 stud placed horizontally on the outside and then something like a Västkustskiva on another 70mm outside of that.

On the inside, plastic and then horizontally laid 45 stud with insulation and installation space. The total insulation thickness would then be 70+70+170+45 = 355mm. This would be a very well-insulated wall that doesn't become overly thick. Västkustskivorna usually have a lambda value around 31, which is slightly more compared to regular mineral wool!