Howdy folks.. I recently purchased a fireplace door/screen assembly for my fireplace. Installation should be very straight forward however my fireplace has a stone facade that makes for an irregular surface.. This in turn leaves gaps between the door frame and the face of the fireplace. Would it be ok to put some R-30 insulation between the frame and the facade to fill in the gaps or would that be a fire hazard?
The installation booklet said to use Owens Corning RA-28 insulation if you wanted to use more than they supplied however I can not find it locally. Apparently RA-28 is an appliance insulation used in ovens and refrigerators and such.
Any other recommendations would be much appreciated (short of ripping it all out and doing it the correct way).