White Roofs and Surfaces Overlooked Key to Reducing Global Warming
 

http://ecorenovator.org/forum/attach...1&d=1400776898

Here we have a good article that quantifies some of the savings that can be had by switching to a lighter colored roof.

White Roofs and Surfaces Overlooked Key to Reducing Global Warming

I agree that we all need more albedo; especially an increase in 50%. Does that increase require any special pills?

Steve

I like the idea of having a white roof, however, there have been studies about the increase in global temperatures even though there is a localized cooling effect (the interior of the structure).

White Roofs May Actually Add to Global Warming
The Easy Fix That Isn’t: White Roofs May Increase Global Warming

Don't get me wrong, I like the idea, but maybe (just maybe) it's not the best answer. Installing solar (thermal or PV) can also have a similar localized cooling effect (from the shade it provides and the air flow underneath). A "green" roof comprised of plants would also work extremely well, not to mention provide a nice garden, maybe even some veggies! :)

How about White shingles and White metal roofs? No special coatings, just color.

I'd say it has a similar effect. However, some metal roofing has special reflective paint which can further reduce the solar heat gain on the roof.

Only effective in climate zones where people want/need A/C

We don't all live there, I don't.

I'm in climate zone 5, close to 6, at HIGH altitude (8,500') & dry.

My dark green steel roof is a good balance here.