Spray Foam is a very cost-effective and efficient way of insulating your home. Fiberglass has more leakage than Closed Cell Spray Foam, which doesn’t have any leakage. Fiberglass is installed by homeowners, but Spray Foam is applied by a professional. There are benefits and downsides to both.
The benefit to Fiberglass is that it is a low-cost insulation. The downside is that Fiberglass contains millions and millions of tiny pieces of glass that hold bubbles of air and these air bubbles slow the heat transfer through your home. The benefit to Spray Foam is that it adds strength to the structure of your building, it is permanent, stops air and moisture infiltration and helps cool and heat your home.