Most cost effective system for energy efficient home?
O.K., so we’re designing a new home and I’ve been reading a lot; books, magazines and forums such as this hoping to find the answer to the question… what is the most cost effective system to build an energy efficient home. SIPs, double stud walls, 2×6 wall with rigid foam insulation on the exterior, spray foam, cellulose and so on. So many options, so little time.
I’d also like to avoid as much as I can petrochemical based products and use as many natural and/or recycled products as possible. I understand the argument that using foam insulation in the end saves more oil than is used to produce it but if I can get equal or better results using natural/recycled, all the better.
The concept being discussed here, a vapor open wall system seems a sensible approach allowing the wall to dry to the interior and exterior.
I know that it’s difficult to say what’s best, but any thoughts on what works and what doesn’t would be greatly appreciated.
We’re in the cold climate of New England (RI).
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