Musketier
2017-01-11 15:25:54
- #1
OSB boards act as a vapor retarder or vapor barrier. That means any moisture beneath the OSB board cannot pass through. Therefore, it is generally recommended to insert a ventilation layer between the insulation and the OSB boards or, instead of OSB boards, to lay tongue and groove boards, as tongue and groove boards are moisture-permeable. These are my layman’s knowledge. Whether this is different with concrete ceilings, I do not know.
Did you install it yourselves or have it installed?