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We are using RoofTopGuard II High Performance Roofing Underlayment. How does this compare with felt as relates to indoor air quality?

— Susan Mayne San Rafael, CA

Answered by Danny Kelly on August 20, 2010

I'm reroofing a typical sloped roof -- what materials should I be considering?

— Susan Mayne San Rafael, CA

Answered by David Edwards PhD on June 10, 2010

The old shed needs a budget makeover, mainly the roof. Can I paint the asphalt shingle roof? What product would you recommend?

— Cathy Frederick, MD

Answered by David Edwards PhD on June 9, 2010

Cedar shakes are used in our historic area of Palm Springs. Are cedar shingles considered a sustainable roofing system?

— Reuel Young Palm Springs, CA

Answered by David Lavender on May 5, 2010

Are there any recycled roofing products that look like composition shingles? Are there any made from nontoxic materials?

— Scott Beeman

Answered by Kati Curtis, LEED AP ID&C, CID on March 12, 2010

What are waterproof roof decking options?

— Rose Lathrop

Answered by Gary Shlifer LEED AP+ H, LEED AP+ BD&C on January 14, 2010

Are there any cost-cutting shortcuts for planting a green roof on my urban townhouse?

— Rachel Diamond, Harrisburg, PA

Answered by Mark Schrieber on August 25, 2009

What are the sustainable options for re-roofing our 30-year-old home?

— Jennifer Marks, Tiburon, CA

Answered by Cynthia Phakos on November 26, 2008

Can I apply spray foam insulation directly to the underside of a metal roof?

— Casey, Virginia

Answered by Mick Dalrymple on May 8, 2008

What's the difference between a green roof and a white roof?

— Angela Corcoran, Brooklyn, NY

Answered by Susan Wisniewski on May 2, 2008

 
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