Green Policy

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Leader in the Green World

Who coined the term "green building"? If not responsible for the term itself,... More

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Power Lobby Fights Solar Industry

A national lobby for electric utilities is waging a state-by-state battle to hold solar energy back, according to a Washington Post report. More

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Mapping Green Space

The EPA's EnviroAtlas provides a one-stop reference for identifying everything... More

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Energy Tax Credits

Roll over this interactive poster to see the requirements and deadlines for... More

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In the News

Sealed crawlspace testing sheds new light on energy performance ; Advanta shuts... More

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R-19 vs. R-20 Wall Insulation

The federal stimulus plan's energy tax credits for insulation are based on the 2009 IECC, which raises the wall insulation requirement for climate zones 5 and 6 from R-19 to R-20. To meet this requirement, the R-value of the cavity insulation must be at least 3.63 per inch. Does this mean that standard R-19 fiberglass batts used to insulate 2x6 walls would not qualify for the tax credit? How about Icynene, an open-cell spray foam with an R-value of 3.6 per inch? More

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In the News

Stimulus plan promotes energy-efficiency spending; California approves PEX;... More

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In the News

Unions sue feds over safety gear; Lennar demands givebacks; energy efficiency... More

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In the News

Cement supply update; Hurricane Katrina damage estimates; free resources; a... More

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