Spray polyurethane foam (SPF) insulation makes complete sense from the moment it bonds to the frame of your home. You can actually see the seal created as liquid foam thoroughly fills every crevice and solidifies into a seamless high performance barrier, special formulated to protect you, your family and your home investment. Yes, foam insulation of this quality costs more, but consider the benefits: higher R-values, increased energy savings over the life of your home, low long-term maintenance costs, effective sound insulation, added structural strength, resistance to mold, pests and pollutants, and even reduced installation and construction waste.