Many discussions of structural insulated panels come around to a concern that they don't fit well with the idea of a 'traditional' house. A friend and his wife gave up on timber framing over their refusal to live in a home "wrapped in toxic foam." [not looking for an argument over the relative merits of existing foam types - people are going to have opinions regardless of facts...]
Not a real concern for me, but I am curious; has anyone ever proposed building an SIP panel with some less controversial insulation? The way panels wrap the house in a tight seal while revealing all of the timbers to the building interior is hard to beat. Anyone ever consider offering panels with some sort of "green" filling? [brown rice husks, the fur swept up from your local pet rescue center? something more practical?]
Seriously, any alternatives to the two leading foam types?
