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Are there general size guidelines for choosing trees for green roofs? What is the minimum area needed per tree?

— Brad New York, NY

Answered by Richard Heller on July 5, 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

What is the most energy-efficient roof for my two-story home in a northwest suburb of Austin?

— Betty Saenz EcoBroker GREEN REALTOR Leander, TX

Answered by Alex Biyevetskiy on April 9, 2010

I am building a screen house with a metal roof -- do I need roof felting, and if so, is there a non-asphalt nontoxic alternative?

— maia Harris Cummington, MA

Answered by Christian Kienapfel | AIA Architect | RA | LEED AP | Dipl.-Ing. Architekt (Germany) on March 23, 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

Is metal roofing a good green upgrade project?

— Terence Faison

Answered by Gary Shlifer LEED AP+ H, LEED AP+ BD&C on March 2, 2010

Green roof to offset the required land space for zoning?

— feng schaefer

Answered by Kathy Spence on February 2, 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

 
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