EH,
How do you enclose (or infill) and insulate your timber frames?
As for the SIPs, I hope they last longer than 50 years. (but I'm not saying they will - how can we know?) I decided not to use plywood or SIPs in my roof system because I just didn't feel that either, in that particular service, could outlast the slate above it or the timbers beneath it. As for my walls, the SIPs with prefinished window openings and electrical boxes were just too tempting to pass up (and I was resigned to some sort of sheathing to get the added stiffness). It went fast, but screwing the SIPs to the frame felt like taking a magic-marker to an oil painting.
20% of my house walls are infill (sans SIPs). That's why I am so keen to learn more about the way you do it EH.
-Thomas
