Rozz

Bosn, you have a good point about problems with remodeling. One solution to this is too apply the foam only one to two inches thick against the exterior sheathing and fill the space between that and the finished wall with Batts. This provides EXCELLENT R value and still allows for remodeling. I did this in a home I recently built and it is amazing how well it holds heat and deadens sound. I would even argue that despite the reliance on fossil fuels for producing it there is less use in energy for heating/cooling in the short and long term.

Epernik was worried about the house being too tight. There is a simple solution to this. Use an Air/Heat Exchanger that is set to run either on a pressure basis, moisture basis, manual demand or percent time. This is a system that can connect the exhausts in the kitchen, baths and laundry rooms. It exchanges moist stale air for fresh air as well as transferring some of the out going heat to the incoming air. If you are using a wood burning stove, insert a dampered vent to the outside for additional incoming air.

I have used the do it yourself foam and the stuff is GREAT. I would never build another house without it!