Why is the surface of sprayed polyurethane foam so critical for a successful roofing job?
The surface smoothness will have a direct impact on the amount of coating needed. If the surface is smooth or has what is described as an orange peel textures it is suitable for coating. Also its smoothness will make coating an easy process. As the surface roughness increases to verge of popcorn and ultimately “tree bark”, the roughness increases and it becomes more difficult to get the required amount of dry film milage on the entire exposed surface of the foam.
