I have a question I'd like to throw out there.
I'm looking at enclosure systems for my timber frame cabin/house. I was originally thinking of SIPs, but am now re-thinking the idea, mostly because of budget issues. I have another idea that I've been thinking about...
My roof system is a common purlin system with purlins at 48" OC. I was thinking about adding 2X6 rafters on top of the purlins (with a spacer in there for slipping in drywall), putting fiberglas batt insulation between these rafters. Adding one or two layers of rigid foam insulation on top of the rafters, and OSB, and then standing seam roof.
I was thinking about using Atlas Roofing's ACFoam, cross-vent panels (rigid foam with OSB sheathing and a built-in air space).
I was thionking of a similar system for the walls.
Any thoughts on this idea? or any experience with the Atlas Roofing products? Any idea where one would put a vapor barier in such a configuration?
Any thoughts are welcome.
Jon
