The foam roofing found on portions of residential homes and commercial buildings is often created using spray polyurethane foam. To create the foam, your foam roofing installation experts will initially spray a liquid onto your roof surface by mixing two highly reactive chemical compounds called isocyanate and polyol. A very important step in the process where corners are often cut or overlooked all together is the prep and cleaning process of the surface where these materials are applied. Attention to these details and steps are crucial to the longevity and quality outcome of this type of roofing system. These two chemicals are pumped from separate containers through heated, high-pressure hoses to an internal mixing spray gun. Once this mixture is sprayed onto the surface of your roof, in three seconds, it rises between 1.5-3 inches depending on the application. Within a minute, the foam hardens and can be walked on. After hardening, the foam forms a monolithic cellular membrane covering your entire roofing system. This foam application is incredibly durable but will need to be followed with a coating to ensure that it is water resistant and moisture will not penetrate to the deck of the roof allowing water to damage the inside of the structure.