A radiant barrier reduces the heat transfer from the underside of the roof to the other surfaces in the building like the deck substrate, duct work and ceiling materials. When the sun heats a roof, it's primarily the sun's radiant energy that makes the roof hot. Starting from the super heated roof surface (200 degrees), building envelope components then radiate gained heat energy to relatively cooler surfaces and spaces. The building interior is now penetrated and occupant comfort is sacrificed.  
 



Heat Guard Today's mission is:

                             -To understand your current building envelope issues and expectations.-
                           -To share viable solutions to help address the issues most important to you.-
                  -To be part of your team that saves energy and provide an optimal return on investment.-

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Build It Green is a membership-supported Bay Area nonprofit established in 2005. The organization works with building and real estate professionals, local and state governments, and homeowners to increase awareness and adoption of green building practices. 

The National Renewable Energy Laboratory (NREL) is the U.S. Department of Energy's primary national laboratory for renewable energy and energy efficiency research and development.

© 2015 by Dustin J. Markowitz. All rights reserved.

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