“If this had been any other roofing material, such as asphalt, TPO or EPDM, the entire roof would have to be replaced,” stated Tom Johns of National Roofing. “Because this was a PVC Sarnafil membrane, it just needed to be cleaned. The Sarnafil membrane assembly took an extraordinary dynamic load impact from a rotating razor and didn’t leak even after thousands of gallons of water were dumped on it.”

yes
only 2 percent of the affected area needed to be replaced

Read the full story of this incident and how the Sarnafil membrane was put to the test.