@AmeliesUncle wrote:
The 5695 Instructions say:
A component isn't specifically and primarily designed to reduce the heat loss or gain of your home if it provides structural support or a finished surface (such as drywall or siding) or its principal purpose is to serve any function unrelated to the reduction of heat loss or gain.
https://www.irs.gov/instructions/i5695#idm[phone number removed]200
That's good. I think that would mean that if you installed separate insulation panels under the siding, they would be covered, but not a integrated product.
