The roofing "has heat-reflecting particles impregnated into the composition roofing
that help the house stay cooler in the summer and help absorb heat in the winter," he added.
I've read that it looks like and only costs a few thousand more than conventional composition roofing
. On sunny days the roof is supposed to generate more than enough electricity to power the home it's covering, even with air conditioning, and the surplus goes back to SMUD.