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Community and Q&A

Ceiling air barrier for metal ceiling panel

ckfk | Posted in Green Building Techniques on

I’m building a heated garage and am considering using a metal ceiling panel in place of drywall.  I’m in zone 6 and will have R49 blown in cellulose in attic using raised heel trusses.  The drywall was going to be my air barrier.  Since I won’t need the drywall, what would you recommend for an air barrier.

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  1. Expert Member

    6 mil poly taped and sealed.

  2. GBA Editor
    Martin Holladay | | #2

    In general, you'll get the best results if you first install a drywall ceiling and tape the seams, and then install your metal panels. Fastener penetrations through drywall don't leak a significant amount of air -- but fastener penetrations through 6 mil polyethylene can leak a lot of air.

    In short, you need a good air barrier. Don't skip the drywall.

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