The complete source for building, designing, and remodeling green homes

Musings of an Energy Nerd
Preventing Roof Algae

How to keep your asphalt shingle roof from being discolored by black streaks
Building Science
Insulated Rooflines and Shingle Temperatures

Research from Florida shows that shingles don't get much hotter with spray foam insulation under the roof sheathing

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Preventing Roof Algae