Metal roofs are durable and recyclable — but do they really save energy?
Images:
[![][1]][2]
David Martin is intrigued with the idea of replacing his existing roof with a standing-seam metal roof. It should last longer than the alternatives, he says, and it would be compatible with photovoltaic(PV) Generation of electricity directly from sunlight. A photovoltaic cell has no moving parts; electrons are energized by sunlight and result in current flow. panels should he decide to add them in the future.
So what's the issue?
David Martin is troubled by some of the advertising claims he's seen about metal roofing, specifically a statement from the [Metal Roofing Alliance][3] that a "cool metal roof can save 25% in energy costs compared to a dark grey asphalt shingle."
[1]: http://www.greenbuildingadvisor.com/sites/default/files/imagecache/blog-river/solar panels.JPG (Metal roofing and solar panels)
[2]: http://www.greenbuildingadvisor.com/blogs/dept/qa-spotlight/staying-cool-metal-roof
[3]: http://www.metalroofing.com
URL: http://www.greenbuildingadvisor.com/blogs/dept/qa-spotlight/staying-cool-metal-roof
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