Functions of Roof Coatings

Roof coating is a roofing membrane made of either elastomers (elastomeric roof coatings) or fully adhered monolithic fluid. The roof coating is the outermost layer of the entire roofing system, as it is 20-40 dry mils thick. Therefore, it is the most exposed layer of protection for a roof, and receives the strongest beating from the sun and UV rays, rain and hail, wind, debris, and all of Mother Nature’s most damaging effects.
Roof coatings work in several ways:

1. Roof coating reflect the sun and weather, thereby reducing cooling costs and the need for extensive cooling systems.
2. Roof coating’s elastic properties allow it to stretch and shrink without lasting damage (known as elastomeric roof coating).
3. Roof coatings act as an additional form of waterproofing, while at the same time allowing trapped moisture to escape.
4. Roof coatings can be applied in a range of colors to suit all roofing styles and designs.
5. Some roof coatings are even designed to prevent the growth of moss and algae, and are environmentally friendly.
6. Other roof coatings are capable of preventing corrosion, and are flame-resistant.

Source: Roof Coatings