Right. It's generally assumed that unless you are in need of replacing the siding any way the ROI on outsulating is pretty high. Of course this all gets shot when you do the work yourself and you use recycled foam. I recently calculated the cost of foam needed to put 4.5" on my 1100 sq ft ranch and it only came out to about $1,000. Then lap siding costs about $1,400. HeadLok screws do also cost a small fortune. Probably several hundred for them alone. But you also have to factor in the disturbance to the living space, which to me is a big deal. I don't like living in a construction site. Which reminds me, since I'm up I should probably get to work on my current project.
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