As we begin a series of the most Frequently Asked Questions in insulation, we lead off with a common question about moisture.
Because the cells in closed-cell spray foam are closed, properly applied closed-cell spray foam will not absorb water. It is often recommended for below grade applications, crawlspaces and attics. Even though open-cell spray foam is an excellent insulation product and air barrier, it is susceptible to moisture. Open-cell spray foam is not recommended in all areas of construction.
Most moisture problems in houses happen because of moisture entry from air leakage introducing indoor air to outdoor air. Condensation is sometimes the result. Closed-cell spray foam is a great air and vapor barrier, so moisture in the situation is virtually eliminated.
Foamaster is committed to educating our customers about spray foam insulation. If you have a question that has not been discussed on the Foamaster blog, please contact us. We will be happy to answer your questions.