Hello builder hive mind,

I am installing a chimney pipe for my wood stove in a post and beam cabin with 3″ of exterior rigid comfort board, 475 IntelloX, and two layers of exterior strapping (see detail of construction below). I am curious, now that I have created this large hole, allowing 2″ space for all combustibles I have ruined both my air seal and continuous insulation seal. The roxul comfortboard is rated for up to 2100 degrees F, can I not just insulate directly around the insulated chimney pipe? The pipe itself is only rated to get to 1700 degrees F. Does GBA have an article about this predicament that I am missing, anyone have any construction details to share?