We recently finished a roofing job in Texas that called for scarifying, refoaming and coating an existing structure. Sometimes older, spray foam roofs that haven't been properly maintained are in need of scarification. Scarifying is the process of cutting or planning off the upper surface of the SPF. It exposes the sound SPF to be used as a base for a new layer of SPF and coatings, restoring the roof to a warrantable condition with long-term sustainability. This eliminates the need for costly tear-off and dumping in landfills.
Proper scarifying extends down a minimum of ½ in. to sound, dry
dimensionally stable on-ratio SPF. Care is then taken to assure that
the coatings in the low areas are removed during scarification and that
scarification is extended below suspected problem areas such as UV
We clean the area and then re-foam.
A restored SPF roof can last 30-40 years with proper maintenance.