As the sustainability conversation continues to focus on energy solutions within the built environment, movements such as net-zero energy are gaining traction. Net-zero energy buildings generate as much or more energy than they consume. Although net-zero energy is a bigger energy goal than what is identified for many structures, architects, builders and building owners continue to integrate stronger energy practices in their buildings.
As a key component of a building's enclosure, roof systems that are poorly designed can contribute significantly to the energy demands of buildings. Now, more than ever, spray polyurethane foam (SPF) and photovoltaic (PV) systems are being used together on roofs as a complete solution for energy savings. When joining these two powerful systems, be mindful there are important installation considerations to ensure the highest possible performance and lifespan.
How it works
SPF roof systems consist of three elements. The first is the substrate, which can be a metal, wood or concrete deck surface, or most types of structurally sound and dry, existing roof systems. The second element is a high-density (∼ 3.0 lb/ft3) two-part closed-cell SPF applied to the substrate. After application of the foam, one or more elastomeric coatings, the third element, are applied over the foam to protect the SPF against mechanical wear and ultraviolet light.