I agree with Jay in that its tough to compare the entire system to other approaches but I like many aspects of the system too. My quick concerns are the apparent thermal bridging, lack of shear strength, the accuracy and difficulty site modifications to the panels and that they offer double hung windows as part of the package??
As for the appropriateness of the foam in permaculture
, I think
reducing the ongoing, monthly un-renewable energy
costs is among the most important goals for a permies or green build. The advertised R values seem to address this concern.