[Greenbuilding] [BULK] Re: Air Conditioning for Phoenix

[Bruce Donelson]

Hi there,
> I'm going to push the limits of what he can handle as it is.  A metal
> roof makes a lot of sense in Phoenix, and that is the second part of
> this project that I didn't mention.  Living roofs are great, but involve
> structural mods that I'm not willing to consider on someone else's
> house.
>
What about: put your metal roof on purlins (not all mftrs allow it, but
some do) to create an air channel underneath, vented top and bottom
(hopefully it's a simple roof -- include insect barriers in the vents).
Use a radiant barrier under it, pointing up.

While you are at it, use one of the cool-color pigments for the roof metal.
It reflects hugely more energy than a typical metal roof, and it is good for
a tax credit, too.

Bruce Donelson
A Better Builder