Here are some excerpts from the article:
- Armstrong has been installing sprayed polyurethane foam (SPF) since 1980, and is the largest residential installer of SPF in the United States. In addition to having excellent insulating and reflective properties, SPF has a much longer life span, as a waterproofing membrane, than traditional tar and gravel roofs. SPF roofs can last 50 years or longer, as long as they are protected with a UV coating, which should be applied every 12 to 15 years. The costs associated with SPF are about 40%–50% higher than the cost of tar and gravel roofs, but the paybacks (through longer life and better insulating performance) more than make up the difference.
- It’s amazing to watch the spray-on process—the foam is sprayed very thinly and it expands and hardens immediately.
- Home performance contractors would be wise to investigate SPF roofing and recommend it in the right circumstances and applications