I am seeking an eco-friendly replacement for traditional asphalt shingles.
I am working on a job in which the customer would like to renovate their home as green as possible. One of the largest components of the renovation is replacing the asphalt shingle roof. I have looked into it and have only found asphalt shingles with high SRI values, which is great, but I am also looking for the composition to be made with high recycled content. The house is located in the Northeast and is a Victorian-style home with a pitched roof. I would like something similar in look and function to asphalt shingles. Any suggestions?
Have you thought about checking out metal roofs? Metal roofs are getting much closer in price to asphalt.
- They are green because the metal is post-consumer recycled material and it will be recycled again when it comes off the roof 50 to 100 years from now. I believe the amount of recycled content for metal is a minimum of 85%.
- A metal roof will outlast asphalt at least 3:1. A metal roof installed properly will last 50 to 100 years as compared to about 15 to 25 for a good asphalt roof. So while you might not be thinking that long-term, the longevity of the roof makes it greener too.
I haven't researched the heat island effects of light-colored metal versus asphalt, so I cannot comment on that. I would assume that a light-colored metal would be better than asphalt, but you would need to research the issue.
Metal outperforms asphalt in so many ways. It won't easily blow off the roof in a windstorm, it holds up to hail much better, snow won't stick as easily, etc., etc.
Good luck with your roof!
For more information:
Read David Edwards's Q&A "I'm reroofing a typical sloped roof -- what materials should I be considering?"
Also, read Anthony Addesso's Q&A "Are metal roofs more energy efficient for southern climates than shingles?"