Phil, Jon,
The roofing system I plan to use will have a ridge vent as well as soffits. I want add thermostatically controlled ventilation fans in the ceiling, sort of a whole house fan, with vent in the gables. I have priced the foil backed foam board and thought about installing it as Phil suggested. I'm not sure if I will actually insulate the ceiling and walls as our winters are fairly mild here, I may do that later after I close in the siding.
OSB is going for around $18.00 a 4x8 sheet here, it can get expensive. The idea is to have a portion of the roof completed so I can deal with moving my shed, the da has to be moved to complete that end of the shop. As Jon said in hind sight I wish I had placed the shed farther out from the slab, that was 2012 though.
