Insulation, Radiant and Vapor Barriers - Vapor Barrier between attic subfloor and celing in living area?

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PDA
2008Home
05-14-08, 02:05 PM
2" x 6" pine tongue and groove between ceiling living area and attic subfloor. The attic subfloor will be insulated with R-30 fiberglass insulation. The Attic subfloor will have 3/4" tongue and groove plywood.

The question is will I need a vapor barrier above the ceiling between the attic subfloor and celing tonque and groove?

Would 6 mil plastic work or will I need some type of other vapor wrap, like tyvek?

jurched
05-19-08, 06:19 AM
What's the ceiling look like? If its a painted ceiling, does it have oil primer beneath the final coat? That alone may suffice as a vapor barrier. If not, you may find it expedient to repaint your downstairs ceilings.

J
2008Home
05-20-08, 09:15 AM
The celing tongue and groove will have a wood sealer in ceiling area.