Essentials

Recoating an SPF roof system

Many spray polyurethane foam- (SPF-) based roof systems are coated with elastomeric coatings that generally require some amount of yearly maintenance and recoating about every 10 years to 15 years.

NRCA is aware of instances when SPF roofing contractors have been involved in recoating projects where there has been confusion regarding the interpretation of building code requirements, specifically whether a recoating project can be construed as a reroofing project.

The 2003 International Building Code (IBC) defines reroofing as "the process of recovering or replacing an existing roof covering" and roof covering as "the covering applied to the roof deck for weather resistance, fire classification or appearance."

One of the building code's requirements for determining whether a re-cover roof system can be installed is whether the existing roof has two or more applications of any type of roof covering.

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