What under insulation in mid-floors?

[En apelsin]

Hello, I am building a vacation home with a loft over half of the house. The intermediate floor will be insulated with rockwool to dampen sound. There will be a bathroom on part of the under-loft.

The construction is as follows:
1. Ceiling: plasterboard, in the bathroom moisture-resistant plasterboard + waterproofing
2. Furring strips, 30 cc.
3. Rockwool between rafters/floor joists set at 60 cc.
4. Wooden floor 28mm

Should I have any material (vapor barrier, lining paper, construction plastic, or other) between the rockwool and the furring strips? Should it be different materials in the bathroom and elsewhere? How have you done it? What is standard practice?

 

[InsidersUnited]

It will be fine, have the same as in the rest of the floor structure. The only thing you should avoid is plastic against the outer wall in the bathroom section. (If your waterproofing layer fails and moisture gets into the wall, it will "get stuck" between the bathroom's waterproofing and the construction plastic in the outer wall. Without it, at least there's a chance for it to dry out.

 

[En apelsin]

Sounds good, use the same as in the rest of the joist. The only thing you should avoid is plastic against the exterior wall in the bathroom section. (If your waterproofing fails and moisture gets into the wall, it will "get stuck" between the bathroom's waterproofing and the building plastic in the exterior wall. Without it, it at least has a chance to dry out.

Thanks for the response! I'll go with no layer between battens and insulation.

 

[surris]

You can also use regular drywall in the bathroom.

 

[En apelsin]

You can use regular drywall in the bathroom as well.

Even above the shower?

 

[surris]

Even over the shower?

Yes

 

[En apelsin]

Yes

Thanks