Thoughts on vapor barrier

[Rena]

Hi,

I live in a house with an unfinished upper floor and have started thinking about renovating it. The ground floor is concrete from Finja prefab, while the upper floor is a traditional wooden frame. There are many steps to go through, one of them being how to handle the vapor barrier (or whatever the correct term might be). For concrete walls, I understand that you don't use plastic as in a wooden frame. How on earth do you handle this on the upper floor? Currently, the insulation on the attic is directly on the fabric, which in turn is on the battens. Are you with me?

 

[Jonatan79]

In the intermediate floor, the one you have a picture of, you don't need to have plastic/vapor barrier. You should place it in the ceiling against the outer roof, so to speak...

 

[Rena]

In the intermediate floor, the one you have a picture of, you don't need to have plastic/vapor barrier. You should put that in the ceiling against the outer roof, so to speak...

Not sure what you mean, today the upstairs is uninsulated, i.e. a cold attic. But if I furnish it, I will need to apply plastic to the knee wall, slanted wall, and the roof (upstairs). The question is how this connects to the downstairs. Do you follow?

 

[Jonatan79]

Ok. You should only finish the plastic where the new floor meets the interior wall or a little bit under the new floor.

 

[Rena]

Ok. You should only end the plastic where the new floor meets the interior wall or a little bit under the new floor..

Tape against the fabric that is in the picture then?

 

[Jonatan79]

Do your best, it's not the end of the world otherwise.

 

[Rena]

Do the best you can, not the end of the world otherwise.

We'll see if there will be an upper floor, if nothing else it's fun to think about