Wall system for recording studio / home. Vapor questions?
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.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Replies
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.