06/03/2026
This is a great demonstration of the difference between fiberglass, spray foam, and cellulose showing no matter how much R value you have without a complete air seal you are going to have air moving through your attic into your living space. This display is a sealed environment with three seperate chambers. There is a small fan in the center of the chamber that blows air into the bottom of the three chambers which shows how air moves through the three types of insulation shown. This display shows how without an air seal insulation, is just like putting a thicker jacket on but leaving it unzipped.
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