Hello,

even though I find quite a few threads on the subject, I can't quite figure out the best way to do it and why.

Therefore, I thought I'd present you with a colorful sketch made in Paint and try to clarify some of my questions.

Sketch of a shed's cross-section illustrating insulation, floor layers, planks, joists, and a foundation post. Labels clarify measurements and materials.

There is about 10-20 cm between the ground and the bottom.

Do you need a diffusion-open wind barrier under insulation for a friggebods, and if so, why?
If you are to install a wind barrier, where should it be placed? under the 22x95 plank, or between the 22x95 plank and the base floor?

I imagine the cabin will be electrified and kept heated year-round, possibly not more than 12-15 degrees.

Do you need to install a vapor barrier inside, and if so, where should it be placed? Between the insulation and the subfloor, or between the subfloor and the surface layer? At this point, I don't know what type of surface layer it will be, but the shed is intended to be used for tools, etc., so something reasonably durable will be chosen.

Thank you for your answers!
 
My floor joists are 50x150(2"6").
I have 50 mm cellplast(bottom) and 95 mm fiberglass.
Vapor barrier?, no.
 
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