Washington RetroFoam understands that your home is a big investment and you don’t want to waste time and money dealing with an uncomfortable home and high energy bills. RetroFoam is a tripolymer based resin that creates an odor-free, non-toxic foam insulation that creates an air seal. This injection foam doesn’t off-gas, is Class One Fire Rated, and safe to have in your home. It is an excellent fit for existing exterior walls and can be installed outside the home. Insulating an existing home with RetroFoam is one of the best ways to make your home more comfortable, lower your monthly energy bills, and reduce your carbon footprint. We service King, Snohomish, and Pierce Counties.