Hello all,

That was a good post regarding rigid insulation on a roof. I'm interested in the same concept on a wall for the same reasons that Dave outlined - cost, ease of install, no crane. I would be interested to hear any feedback.

I was thinking about an assembly (working from the inside out) that would see the timberwork clad in 2X material, VB (if required in this particular buildup), polyiso sheet goods taped and foamed, sheathing (screwed through to the 2" material), and housewrap. Voila - just like a panel...

I was wondering if this assembly could be built like a panel, with a similar window and door construction (eg. to remove the foam from the perimeter of the RO, insert lumber and fasten).

I thought the 2X material could be beneficial for a few reasons. Mill a few stacks of 2x8s, machine a rabbetted or t&G edge, spray it before you install it and it becomes the finished interior. One could affix drywall to this as well. Also, no shortage of backing...

Any thoughts?

Brock Smith