I design superinsulated houses. After trying many methods of achieving high R-value walls, I have settled on a system that I am comfortable with. The following represents some details that I've developed to make it painless to build with extra-thick walls. First, I'd like to explain why I build this way. There are several approaches to getting an R-30-plus wall. Any method should be evaluated in terms of cost, ease of construction, and effectiveness. In addition, you should consider how much it differs from standard building practices. Include in this whether subs will need to make extra visits to the site, and whether the normal sequence of construction must be altered. Finally, consider whether the wall system works well with
