Spray Polyurethane Foam (SPF), or spray-on roofing, is liquid polyurethane foam plastic. It is sprayed like paint but when it dries, it develops into a semi-solid or solid condition. It expands to at least a hundred times than its previous …
Spray Polyurethane Foam (SPF), or spray-on roofing, is liquid polyurethane foam plastic. It is sprayed like paint but when it dries, it develops into a semi-solid or solid condition. It expands to at least a hundred times than its previous …