Is this a vapor barrier or?

[zana kader]

Is it a vapor barrier? Or just meant to hold the insulation. In the ceiling of the laundry room

 

[Takläggare]

Hmm, a little bad at seeing the difference, but as a professional, I see a condensation web that is not approved as a vapor barrier, this one you have should be installed directly under an outer roof, as condensation protection.

See if you see any markings on the plastic.

 

[zana kader]

Hello. It's in the laundry room from the 70s. There was also a shower. But does it do the same job as plastic? Can't see any moisture anywhere where I've cut a little.

 

[Tomture61]

[image] Is it a vapor barrier? Or just intended to hold the insulation. In the ceiling of the laundry room

I think it looks like a safety net.
https://www.byggmax.se/kondensväv-bison-p6303013?gclid=EAIaIQobChMIp-D9-5Dm6wIVcSB7Ch3UmQaNEAQYAyABEgJLxfD_BwE
However, it is not considered diffusion tight.

I have this in my intermediate floor, 1.5-story house.

 

[zana kader]

Could it not be this variant?

https://www.byggmax.se/säkerhetsväv...xf-lqlm_EmR5CEMxfbTRkYaAmkhEALw_wcB#267=33208

 

[Tomture61]

Could it be this variant?

[link]

How do you find the surface of the fabric, like burlap or smooth?
If it's smooth, it might be as you think in your post #5