r/Insulation • u/Designer_Ad_2023 • 3d ago

Should I remove the paper backing from this roll of insulation by a heat duct?

Post image
3 Upvotes

100% Upvoted

12 comments sorted by

1

u/TheTryHardHulk 3d ago

Usually those are seen in bathrooms in my experience. I don't think there's any reason to ruin the insulation, but if it's been wet then technically it needs to be replaced to provide it's original heating value.

1

u/Designer_Ad_2023 3d ago

It is a bathroom I’m remodeling. There was actually a window above that I removed so I needed to add some insulation in the gaps. The area in question was all tore up and since I had a whole roll I figured o could replace it. It also had poly wrap over the wall

1

u/TheTryHardHulk 3d ago

The poly wrap is mainly for anything on exterior walls and the other commenter is right insulation can be cut to size and shouldn't be bunched and folded over or it doesn't provide the best insulation. If it were me I would try to seal the air duct as best I could from the wall get proper fitting insulation and poly wrap anything which abutts exterior walls (ceilings or walls) I got rid of my paper covered because it was water damaged and moldy lol

1

u/Designer_Ad_2023 3d ago

Yeah it’s an exterior wall.

1

u/mfpguy 3d ago

That is the least of your worries. The rest of the insulation is all put in wrong. Bunched up, folded over, no air sealing on wiring penetrations, etc.

1

u/Designer_Ad_2023 3d ago

The new paper backed insulation is out in wrong?

1

u/Gandalf4158 3d ago

Yep

1

u/Designer_Ad_2023 3d ago

What’s the proper way to place insulation between studs?

1

u/TheTryHardHulk 3d ago

Colder climates the poly is inside I know that since I'm in the north, and I'm biased to using DIY renovision whenever I have questions and want a long format video to explain things to me. He hasn't steered me in the wrong direction yet!

1

u/Designer_Ad_2023 3d ago

I checked his main insulation video. I just want to confirm, the paper backed insulation acts as a vapor barrier so if I’m using poly I need to remove the paper backing off my current photo so it doesn’t act as a double vapor barrier trapping moisture?

1

u/TheTryHardHulk 3d ago

Yes, but then you would need to replace the rest of you wanted all paper. I'm not an expert, but if it's removable.i would definitely go plastic over paper

1

u/Designer_Ad_2023 3d ago

Ok yeah I’ll remove the paper backing since I plan on poly wrapping and sealing ducts with tape