Hello, I am rebuilding my reefer/icebox in-place and have some questions for those with experience or insight. So far I've completely removed the old icebox
(fiberglass liner) and all the old insulation
. My questions are:
1) Is it okay to directly build up the icebox
then fiberglass) against the hull
My concern is that the hull
may flex or twist slightly relative to the rest of the galley
cabinetry. If I find myself offshore
in storm and the hull does flex relative to the cabinets, then the inner icebox (fiberglass surface) itself could crack or maybe break free of the insulation. If that happened, then that would be a potential path for airflow which would prevent the insulation from working. Or am I overthinking this?
The alternative would be to build a free-standing back wall attached directly to the cabinet sides and offset from the hull. The problem there is that the hull is a very complex contour with a structural rib
right in the center. The offset wall would end up eating up a very large portion of the volume available.
2) How do you apply a vapor barrier with 2-part foam (like Dow's Froth Pak, Tiger foam, or pour-in foam)? Do I spray/pour first, then apply a vapor barrier and then continue insulating with board foam? Or do I apply vapor barrier then spray?
My concern would be that if I apply vapor barrier then spray foam - if I accidentally step on the vapor barrier or miss-handle it while doing other work
- it will pull off the spray foam.
Thanks in advance!