Spray foam insulation is made out of an inert polymer, which is designed to last just about forever. Just have it blown in, and you won’t ever have to worry about having to replace your insulation, for the life of your home. It has the advantage of adding strength and rigidity to your house, making it stronger than other types of insulation. This is due to the fact that it makes the walls it is put inside of thicker, and therefore stronger. This could be very important, especially in an area where hurricanes are known to occur. It is a very popular product for home insulation, and has been around for more than 30 years.