Create an insulated technical room for the gas boiler in the attic

Statics ok? Such a water tank can get pretty heavy...

He would stand on a wall. According to the construction management, it is unobjectionable.

Statics okay? Such a water tank can get quite heavy...

Aha how heavy 200kg-300kg per m2 as much as 2-3 people so not concerning. Or will it be an 800 liter tank?

Aha how heavy 200kg-300kg per m2 as much as 2-3 people so not concerning. Or is it going to be an 800-liter tank?

I didn't find the question entirely inappropriate. After all, there are 300 kilos on 1m2 on a wooden beam ceiling. But if the beam rests on a wall, according to the construction management, it is not concerning.

Regarding insulation. We have 160mm rafters. I want to clamp 160mm compression fleece 035 between them and then seal it with a vapor barrier (Alujet Topjet SD value >100). Are there any objections?

What goes under the battens towards the roof? That should then be vapor permeable...

There is a highly vapor-permeable underlay membrane installed there.