Understanding the Durability and Longevity of SPF

Understanding the Durability and Longevity of SPF

Spray foam roofing will last a lifetime if properly cared for. Warranties are determined on the thickness of the coating sprayed over the foam for the UV protection. If the coating membrane is cured at 24-32 dry mills (about the thickness of a nickel) it will take at least 15 years of UV damage for the coating to wear off and expose the foam layer. After the 15 year period has come to an end it is recommended to inquire for a new coat of coating (acrylic, Silicone, epoxy, urethane, etc..) to apply over your roof in order to build the membrane back to its original thickness then the 15 year warranty period will re start. The warranty can span 15-30 + years depending on the thickness of the coating membrane. 

What is Foam Roofing?

Foam roofing is a fluid applied seamless membrane that can be used on residential roofs using spray foam and UV protective coating. Foam is applied at the industry standard thickness of 1.5 inches unless specified otherwise. The thickness can be manipulated I order to promote positive drainage. Acceptable substrates to spray foam onto are asphalt, concrete, bitumen, metal, wood, and other roofing substrates. 

Understanding the Durability of SPF Roofing

According to performance tests and research, SPF roofing systems can up to the lifetime of the house. Furthermore, they require relatively little maintenance compared to other roofing alternatives. They are also resistant to hail and wind-driven debris leaks, resist strong wind blow-off, enhance structural strength, and limit moisture damage within the building envelope.

Moisture penetration and a lack of wind resistance are the two most common reasons for early roof collapses. Moisture in roofing systems causes leaking, faster insulation and membrane failure, structural degradation, asset depreciation, and poor thermal efficiency. 

Similarly, the removal of a roof during a significant windstorm causes structural damage and exposes the structure’s contents to the elements. Roofing is the leading cause of disaster-related insured losses, according to the insurance industry.

Because of its 90% closed-cell features, SPF roofing prevents moisture ingress. Localized damage in your SPF roof doesn’t necessarily result in water leaks unless the damage doesn’t penetrate through the foam.

How to Extend the Life of Your SPF Roof

Annual to quarterly check ups are a good way to maintain your foam roof. It is important to know that your roof hasn’t been damaged by a 3rd party contractor or acts of god such as falling debris, broken tree branches, bird pecks, etc. If any of these issues are caught in their early stages then preventative measures can be taken to eliminate more severe damage if left unintended. The most important thing to do is keep up with your re coats because the biggest direct exposure to the foam layer will cause the most damage. 


The best thing about SPF roofs is that there is virtually no limit to how many times you can reapply a new layer. As long as you keep up with standard maintenance procedures, your spray foam roof should cover your heads for a long, long time. The durability and longevity of SPF proves itself worthy of looking into.

American Foam Experts is a trusted insulation company in Walnut Creek, CA, that offers expert services to residential and commercial clients. Contact us today to get a quote!