[rvanderpyl]

Our house addition is SIP panel walls on a timber frame, it is noticably more temperature stable than the older part of the house which was milled log. We put single sided sip panels over the outside of the log part, and super insullated the roof, but it still needs more heating than the new part. Even during the coldest days in the winter I can keep the new area nice and warm with just the fireplace. And if it is sunny it often doesn't need any more than that as we have a big bank of windows that face south. Weo used ICF boocks for the new foundation, and it makes a noticable difference in the basement over the old cinder block the original house used to sit on.