Building owners have many options when it comes to maintaining, repairing, or replacing their low-slope roof. One cost-effective option is to apply a maintenance coating system over an existing roof. If applied to a suitable low-slope roof membrane, a maintenance coating system can extend the useful service life and improve the overall performance of the roof membrane. Roof coatings can also be applied over a new roof to extend the manufacturer’s warranty and the expected useful life of the system.

This technical bulletin provides information on: 

• determining if an existing low-slope roof membrane is a good candidate for a maintenance coating;
• selecting an appropriate coating system; and
• preparing a substrate to receive a coating system.

These factors are all critical to the successful performance of a new and maintenance roof coating system.