Polyurethane foam spray is a great solution for flat and low-slope commercial roofing, though its use is not limited to these style roofs. This roofing system has been around for nearly 60 years and is often referred to as self-flashing because the foam conforms and then adheres to any variety of shapes. Once it expand and dries, it creates a seamless solution that provides a barrier for your roof. Because it can be applied at varying thicknesses, it can create a positive slope to improve and allow for drainage. That’s why it’s often used for flat or low-slope roofs that are subject to pooling water owing to their lack of a positive slope.
Spray polyurethane foam is applied as a liquid. It creates a foam that expands 20 times in size to create a solid foam surface that’s an inch to maybe an inch-and-a-half thick. After its application, a coating of elastomeric silicone or acrylic coating with granules is applied to protect the foam base and your commercial roof from UV light, weather, normal wear and tear. It also provides appropriate fire ratings for your roof.