Spray polyurethane foam roofs are one of the energy efficient roofing options available. They're made by mixing two different types of liquid chemicals together. These chemicals react when combined to form an expanding foam that will form a solid roof. The foam is then coated with an elastomeric coating, which is a coating that can expand and contract along with the foam during temperature changes. This coating protects the foam roofing from becoming damaged. There are a number of benefits to using foam roofing instead of more traditional roofing materials.
Often Classified as a Cool Roof
Cool roofs are energy-saving roofs that don't absorb as much sunlight as the typical roof. The coatings used for spray foam roofs are typically reflective, which means they help keep the roof, and thus the entire home, cooler during hot days. White foam roofs are typical because they are more reflective, but tan or light gray coating colors are also available. It isn't a good idea to request dark coatings, as they tend to wear out too fast and absorb too much heat to be classified as cool roofs.
The spray foam itself is often used as insulation, so it helps keep the cool air inside in the summer and the warm air inside during the winter, potentially lowering heating and cooling costs throughout the year. It can help save more than 30 percent of energy costs compared to other types of roofing materials and keep the home 10 to 20 degrees cooler during the hot summer months.
Because the foam forms one solid sheet, there aren't any points where it's easy for water to leak into the home. Should the foam become damaged, it can be easily repaired, but small cracks that don't go through all the layers of the foam won't result in leaks in the home. The foam can be applied in such a way that it minimizes the risk of water pooling on the roof by ensuring proper drainage. Because it also forms an air barrier, it limits the formation of condensation inside the home as well.
The typical roof can be very heavy, but a spray foam roof is much lighter. This means there doesn't need to be as much built-in support for the roof and there's less risk of the roof collapsing due to the heavy weight, especially in the winter when snow can build up on top of a roof.