The most common use for spray foam is in new construction. The high R-value of spray foam insulation means it can provide a more effective thermal barrier with less thickness. Closed-cell spray foam can even act as a vapor barrier, helping to control humidity and keep moisture and pests from entering the home. However, you don't have to give up on the benefits of spray foam if you live in an older home with existing fiberglass insulation.
13 January 2023