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http://home.howstuffworks.com/home-improvement/energy-efficiency/how-to-make-your-home-energy-efficient.htm by Zolton Cohen Inside this Article Sealing the Exterior Sealing the Interior Weatherstripping Doors Sealing Windows Sidewall and Garage Insulation Eliminating Ice Dams Attic Sealing and Insulation Upgrading Attic Insulation Cleaning and Maintenance Water Conservation Builders often refer to the exterior of a home as the “envelope” or the “shell.” Sealing the envelope or [...]