New answers tagged vapor-barrier
If you are installing IC rated lights an are worried about the paper, I would be concerned about the rest of the insulation that surrounds the light. Typically when I set a "new work" style rough in I cut the drywall bigger than the light rough in by a few inches on either side up to the joists that will support the light. Yes I may cut the paper, but the ...
I have never taped or seen it taped, butt the batts tightly together, If it makes you happy tape, most masking tape really wont hold for long on kraft paper because of the temp swings the glue migrates into the paper.
Ideally, you would have used rigid insulation against the concrete. This would have worked as both your insulation and a vapor retarder (but not barrier). These days, vapor barriers are frowned upon in basements, as they ultimately lead to trapped moisture somewhere. The only exception is closed-cell spray foam. That acts as a vapor barrier and insulation, ...
The vapor barrier goes towards the heated size of the home, which in your case will be up between the joists against the floor.
Nope, you don't need it. A paper facer on batt insulation is a vapor retarder, not barrier, and you don't want a vapor barrier or need a vapor retarder. Install it and be happy. Additionally, save the loose insulation (assuming it's not asbestos-laden vermiculite...) and pile it on top of the batts once you're finished. If the final result isn't 12 inches ...
Top 50 recent answers are included