Euroshield shingles are made from recycled rubber tires and are an alternative to traditional roofing. Produced by Global Environmental Manufacturing, they carry no official thermal resistance R Value, but their insulation value is between R-2 and R-3, says Mark Ivers, owner of Oregon-based JAM Roofing, and can put the per roofing square cost at about $525 for new construction. They are guaranteed for 50 years.

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