Benefits of Sprayfoam Roofing Systems
Sprayfoam roofing systems provide many benefits to building owners. The two most prominent benefits are waterproofing / leak prevention and insulation value. Many additional benefits also exist such as superior compressive strength, lightweight, self-flashing, durable and long lasting.
- Leak free monolithic seal over your entire roof deck
- Self flashing
- High insulation value / Rapid payback with energy savings
- Strong adhesion and wind uplift resistance
- Weather resistant
- Lightweight and high strength
- UL and FM approved systems
Sprayed Polyurethane Foam is applied as a liquid using plural-component spray equipment to fill cracks and crevices. It then expands approximately 30 times its original liquid volume to form a hard, closed cell monolithic roof surface. The Polyurethane Foam dries within seconds after applied to the roof surface. Its expansion results in a weather tight roofing membrane that is fully adhered to the substrate. Because of polyurethanes lightweight it adds little additional weight to the structure and is often used in remedial applications. Polyurethane Foam has a history of more than 40 years as a maintainable roofing medium. Polyurethane Foam adds excellent insulation value to the structure and utility bills can reflect the difference.
Lightweight
The weight of polyurethane foam is between 2-3 pounds per cubic foot. One inch of polyurethane foam insulation plus 30 mils of an elastomeric coating weight approximately 60 pounds per 100 square feet, as compared to approximately 600 pounds per 100 square feet for a typical conventional four-ply built-up roofing system. This makes a sprayed polyurethane foam system ideal for reroofing as it is often possible to apply over an existing built-up roof without removing it.
Sprayed polyurethane foam has an R-value of 6.85 per 1 inch thickness, enabling it to provide more thermal resistance with less material than any other insulation.
Once the sprayfoam has been applied to the proper thickness and finish specifications, a protective layer of elastomeric coating or gravel is applied. This protective layer produces a durable weather resistant surface and that can be walked on for normal maintenance.
Protective Coatings for Spray Foam Roofs
Once the SPF has been applied to the proper thickness and finish specifications, a protective layer of elastomeric coating, or gravel is applied. This protective layer produces a durable weather resistant surface and that can be walked on for normal maintenance.
Energy Star – Cool Roofs Program and Benefits
ENERGY STAR qualified roof coating products reduce the amount of air conditioning needed in buildings, and can reduce energy bills by up to 50%. The Cool Roof Program defines certain standards for reflectivity, and maintenance of reflectivity, in roof coating systems. These light colored roof coatings reflect the suns heat and UV rays and often lower the temperature of the roof by up to 100 degrees.
Sprayfoam Roofing Installation
Installation of sprayfoam involves different procedures based on the existing roof structure. It is important to be familiar with all state and local building codes to assure the appropriate materials and procedures meet the necessary requirements in your area.
Elimination of Ponding Water
In reroofing applications, ponding of water may be eliminated by adding an increased thickness of polyurethane foam in low areas. Building up the low areas and sloping the roof so that it drains properly will eliminate ponding water and the additional load factor that is caused by water accumulation.