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Wall system for recording studio / home. Vapor questions?

JOE ROBERTS | Posted in General Questions on

Hello, thanks in advance for your time and knowledge. This site is a great resource.

I am building a home / recording studio in Murfreesboro, TN (zone 4A) and have some questions about my wall system. My plan is to build my walls in the studio as such: vinyl lap siding, 1″ xps foam taped at all seams, osb taped at seams, 2×4 walls with rock wool batts, 5/8 drywall, 1/2″ sound stop fiberboard and finally one more layer of 5/8 drywall painted. All air sealed as best I can. My question / concern is about vapor.

Does this wall system pose any issues with vapor?

Will the foam be a sufficient vapor barrier?

Do the 2 layers of drywall with the 1/2″ layer of fiberboard pose any issues?

Last, the living areas of the house will have the same wall system except only one layer of 1/2″ drywall. No fiber board. Any changes here?

Again, I very much appreciate any reassurance / help on this issue.

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Replies

  1. GBA Editor
    Martin Holladay | | #1

    Joe,
    Q. "Does this wall system pose any issues with vapor?"

    A. No.

    Q. "Will the foam be a sufficient vapor barrier?"

    A. Yes. Note that building codes do not require the installation of a vapor barrier (except under concrete slabs). For more information, see Do I Need a Vapor Retarder?

    Q. "Do the 2 layers of drywall with the 1/2-inch layer of fiberboard pose any issues?"

    A. No.

    Q. "Last, the living areas of the house will have the same wall system except only one layer of 1/2-inch drywall. No fiber board. Any changes here?"

    A. No. You are good to go.

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