I was talking to my neighbor about insulating the basement he had just built a metal work building and had the material we needed 2" blue foam left over r10.5. For the wrap, he gave us, I don't know what it is called but it is 2 pieces reflective foil with thin insulation between (used inside buildings) and we screwed it to the rafters. We just finished this project today. We finished off the edges with aluminum AC/heating tape. Thanks for every ones help.
I have some concern about the possibility of the shower valves freezing, as i don't see how any heat gets to them.