How does Spray Foam Insulation compare to Fiberglass Insulation?
It is very hard to compare the two because Foam pretty much outperforms fiberglass in every way. Insulations are rated by their “R-value”, which is a measure of resistance to heat loss. “R-value” is tested in a controlled environment, not in real world conditions. Not only does Foam have a higher “R-value” per inch, but it does many things that fiberglass just can’t do. It creates a perfect seal so no air can get in or out of your walls or ceiling. Fiberglass does not keep the air from moving in and out of your home. Foam Insulation also acts as a moisture barrier, fiberglass does not. When condensation builds in your walls, the moisture may get trapped in the fiberglass, which could lead to harmful molds in your wall. Once foam insulation is applied, it is there for good. It will not settle or sag like fiberglass. Over time, fiberglass will settle in your walls, which will create a gap near the top of your walls. This allows rising heat to escape your home easily. Spray Foam Insulatio
