Attic floor with Rockwool need vapor barrier if air sealing?
I’m a little confused between advice I’ve been getting locally vs reading up about need for vapor barrier or not. I’m hoping one of the experts here can take a moment of their time to school me on current theory and practices.
House is ~35 y.o. Zone 6 w/3 attic partitions.
Just replaced the roof, and the (3) static vents with all new ridge venting this year.
The 2 unconditioned attics had a fair bit of mold, which I’ve remediated. Not sure if its due to the very low intake/exhaust sqf of previous venting, or the fact that the 50 3″ intakes were mostly covered by insulation….
Sorry, getting back on topic-
Locally I’ve been told I should have a vapor barrier.
Online, I’ve read that air sealing is much more important, and if done basically obviates the need for a vapor barrier.
Since I’m pulling all the old fiberglass, and will be sealing light cans and penetrations, can I skip the vb, or do I need one, or should I install Membrain?
Next year I plan on removing popcorn ceilings, and will be painting with a vapor barrier/retarder paint anyways, and installing continuous soffit venting.
I really appreciate you taking the time to help me out.
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