The use of roof coatings is on the rise as a cost-effective, viable solution for weatherproofing roof systems and helping extend their service lives. Whether an asphalt based or elastomeric coating is used, it’s critical the coating is applied correctly to maximize roof system service life and minimize callbacks. The most common types of roof coatings are bituminous-based (solvent-based) and polymer-based (water- or solvent-based).
To select a roof coating, most manufacturers recommend roofing professionals use ASTM International- or code-compliant products at the proper application rate that meet the requirements of some or all of the following organizations:
• Underwriters Laboratories Inc.
• FM Global • Cool Roof Rating Council
• Title 24
• ENERGY STAR®
Although every roof system is different, there are general best practices to follow when applying coatings.