Typically ranges from R-2.9 to R-3.8 per inch.
Pros
Cost-effective and readily available.
Non-combustible and resistant to moisture.
Provides good soundproofing. –
Cons
Can be irritating to the skin and respiratory system during installation.
Requires a vapor barrier in areas with high humidity.
Foam Board Insulation
Foam board insulation is made from rigid panels of foam, which can be used in walls, ceilings, and under floors to provide high thermal resistance.
R-value
