Can you use rigid foam and fiberglass insulation?
Yes, foam board insulation is an excellent complement to batt insulation. Foam board insulation can add insulation and eliminate thermal bridging when used in wall and ceiling assemblies insulated with batts.
Can I use foam board and fiberglass insulation?
If you can use the foam board and fiberglass – without compressing the fiberglass batts, then I say go for it. However, if you end up compressing the fiberglass then you will greatly lose the rated R-Value with an improper installation and almost certainly negate any possible benefits from the foam board.
Do you need fiberglass insulation over foam board?
Quote from the video:
Quote from Youtube video: Even if you made sure that the fiberglass insulation. Was completely dry you could actually have a leak and trap the in the moisture. Inside between the subfloor and the foam board in the future.
Can you put foam board insulation between studs?
Even with its flaws—namely, its inability to perfectly mold to the bays between the studs—rigid foam insulation will be a better bet than no insulation. Using low-expanding spray foam sealant to seal those gaps further increases rigid foam’s insulating properties between studs.
Can you use foam board insulation in walls?
Expanded Polystyrene (EPS).
It provides an R-value of 4 per inch of thickness and is the cheapest type of foam board insulation. EPS is used under roofing, over foundation walls and beneath siding.
How do you install rigid foam insulation between studs?
Quote from the video:
Quote from Youtube video: So I actually have two layers that I cut for this Bay right here and here's what we're gonna do we're gonna cut this spray foam or pardon me this rigid foam. So that it's about an inch short on the
Do you need a vapor barrier with rigid foam insulation?
Foam insulation usually does not require a vapor barrier. For some foam insulation types, such as closed-cell spray foam and foam board insulation, the insulation itself stops the movement of most water vapor.
What can I put over fiberglass insulation?
Covering Exposed Fiberglass Insulation
Common solutions for covering exposed insulation include: Sealing the insulation by stapling a polymembrane sheet over it. Installing paneling or sheetrock over wall insulation. Installing plywood flooring over floor insulation.
Can rigid foam be used as a vapor barrier?
Rigid foam board, especially foil-faced polyisocyanurate, creates a vapor-impermeable barrier, so the wall would have limited drying potential. Even more permeable types of insulation, such as expanded polystyrene, are vapor barriers when the installation is thick enough.
Can you use fiberglass insulation in basement walls?
Fiberglass insulation can be installed in a stud wall that would be constructed in the basement. It is imperative, if using fiberglass to insulate a basement wall, that a plastic moisture barrier be installed over the concrete before any material that can absorb water is installed.
Can you put foam board over drywall?
To reduce the amount of demolition and waste InSoFast panels can be installed directly over drywall or plaster. Air sealing with spray foam. Straw foam available at your local lumber retailer will work fine.
Does spray foam adhere to rigid foam?
Holladay once wrote of rafters, “Yes, you can combine rigid foam and spray foam if you want to save some money.
Can I spray foam over batt insulation?
Quote from the video:
Quote from Youtube video: If it's fiberglass. And we spray over that fiberglass it'll lay on it fine.
Does spray foam insulation break down?
Another good thing about spray foam insulation is the fact that it also does not break down as easily as fiberglass insulation, thus giving it a much longer lifespan.
