Jay Peters wrote:The semirigid roxul product (actually called comfortboard) doesn't mention anything about airflow though it does say its vapor permeable.
Your suggestions then are :
cover the outsulation completely to block airflow in all cases (including underside) - that's doable and makes sense. Maybe I could do away with the hardware cloth too which will be $$$.
Also I'm hearing that roofing felt would be a good idea. That I figured. Any tips of whether that roofing felt will trap moisture on the interior side?
Rufus Laggren wrote:
The 1900 wood frame I grew up in had no problem with felt on a 12/12 pitch.