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It's vented to the outside, just like a soffit or an attic. Insulating the interior door should not promote condensation.
by quesera 2y ago
It's vented to the outside, just like a soffit or an attic. Insulating the interior door should not promote condensation.
- amluto 2y agoI meant inside the walls. If it’s a bit below freezing outside (quite common in California!) and 75 degrees and a bit humid in the kitchen (also common), and an old wall that leaks air at the top and bottom separates these spaces and has had fiberglass batts installed, poorly, in the name of “weatherization”, then that nice humid air can flow within the wall by convection and moisture can condense out in the chillier bits of fiberglass. In some conditions, it won’t dry and will get moldy. Of course, this can happen in an exterior wall, too, but contractors usually put at least some effort into competent construction in exterior walls.
- quesera 2y agoThread premise began with the homeowner insulating the interior door. Assuming that's done properly, the door should not leak humid air into the (likely uninsulated) exterior wall. If anything, it's the currently uninsulated cooler doors that would be of concern. But, at least for the real life constructions I've seen, this has not been an issue.