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Sheathing and Shingling the Roof - The Habitat for Humanity team moves ahead on the roof. This time it's sheathing and applying shingles. Deane Evans of PATH and Ren Anderson from the National Renewable Energy Lab talk to Bob about some special photovoltaic shingles which convert solar energy into electricity. Bob and Ren begin applying the shingles to the shed roof before heading to Global Solar in Tucson, Arizona to learn more about how photo voltaic film is manufactured.
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