Depending on the kind of permanent roof you purchase, you could be eligible for a tax break. For a limited time, the US Government will be following Congress' Energy Policy Act of 2005, rewarding consumers of quality metal roofs with tax credit savings up to $500.
What's more, a $500 tax credit is truly an extra $500 in your wallet. Tax credits are subtracted directly from "total tax liability," so a credit has a higher take-home value than a deduction. For example, if you're in the 28% tax bracket and wins a $500 credit on your new, energy-efficient metal roof, that's equal to a tax deduction of approximately $1785.50. Doesn't take a math major to see that's a good thing!