Rigid insulation on interior walls and also above roof

Hi all,I have been playing around with a few ideas to adequately insulate my Cape Cod style home. I’m wondering if there’s an issue with having 1” polyiso on the… Hi all,I have been playing around with a few ideas to adequately insulate my Cape Cod style home. I’m wondering if there’s an issue with having 1” polyiso on the…Read MoreGreenBuildingAdvisor