Rockwool ComfortBoard 80
Hello, we just installed our ComfortBoard mineral wool 1.25” as our exterior insulation. We are in zone 4. Two questions that I have –
(1) has anyone used ComfortBoard on the interior as interior insulation? We have a lot of ComfortBoard 80 left, and unfortunately, cannot return it as it was special order. I’m thinking about using the left overs in our interior walls/ceiling, or maybe basement ceiling. Any concerns with using exterior rigid board on the interior? Not for R-value, but for sound transfer?
(2) also, the contractor installed the rainscreen with horizontal furring strips below and above the windows. This was done so we could secure/nail the window trim. Any concerns with air circulation in those areas? Or is it such a small area that we don’t need to worry about it?
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