We're having a roofing guy come over after the holidays so I've been doing a little reading (posted on D&R earlier for more general advice). I don't think DH will ever agree to pay for real slate, and tile isn't appropriate, so natural products are out (unless you have another suggestion). I've seen some recycled rubber tire products made to look like slate. They seem to have good warranties (50 years), but they are petro products, and I know that other petro housing materials (vinyl) don't stand up to long-term UV exposure. I'm worried there might be toxic runoff during rainy season. Also, I'm guessing there will be off-gasing, but since it's the roof, would that really matter for IAQ?
Really, this is a which is worse question, since I seem to have only two options: asphalt or rubber? I guess asphalt is a petro product as well, I just know what to expect with it. Is there any reason rubber might be less EF than asphalt? If they are about the same, and the rubber is recycled plus has a longer warranty (i.e. longer replace cycle), that seems like the lesser of two evils to me. Am I thinking about this the right way?
Re: Green or not green (recycled rubber roofing)?
My DH knows a bit about roofing so I asked him and he was wondering what the recycled rubber bits were bound together with. He said the matrix (what holds it together) would be what you would want to focus on to evaluate the EF-ness (rather than the rubber tire pieces themselves).
I hope that makes sense.