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Air seal inside the studs if I have taped the exterior?

whitenack | Posted in Green Building Techniques on

Hi all,

Building a “pretty good house” in central KY, zone 4A.

We have taped the OSB seams, and taped the seams of two layers of rigid foam insulation. Do I still need to air seal the seams between the inside of the osb and the studs?

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  1. user-2310254 | | #1

    I air sealed on the exterior and the interior on my new house. Doing the interior provided a relatively inexpensive additional layer of protection and made the structure more resistant to air and water intrusion over time.

  2. GBA Editor
    Martin Holladay | | #2

    I'm not sure what you mean by "the seams between the inside of the OSB and the studs."

    If you are asking whether you need to run a bead of caulk (working from the interior) along the 90-degree corners where the OSB meets a stud, the answer is no.

  3. whitenack | | #3

    Sorry for not being clear, Martin. But yes, I meant the interior side of the wall, where the studs and the osb meet. Sealing like what was done in this pic from one of your articles back in 2011.

  4. user-2310254 | | #4

    By sealing on the inside, I meant the type of detailing illustrated in this drawing:

  5. GBA Editor
    Martin Holladay | | #5

    Thanks for the photo -- that's what I thought you meant. Considering the other steps you took, that type of caulking is unnecessary.

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