I was reading the post on philosiphies of timber framing and the topic of insulating tf's came up. My question is whats best? I havn,t used sips , but aren't they made with policyinurate a phormaldahyde thing? I don't care much for fiberglass either but it works. Any one used steel wool insulation and whats it like? I've often thought the british tudor house with there masonary infill was a good idea. I realize motar doesn't have a good r value. What if foam or vermiculite was added and maybe a foil/foam thermal break in the center? Any thoughts?
