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Community and Q&A

Gasket thickness for airtight drywall

TUGdo7DovU | Posted in Energy Efficiency and Durability on

We are planning to install Denarco Sure-Seal gaskets for airtight drywall. Wondering what would be a thick enough gasket, that wouldn’t cause problems when installing the 4/4 (3/4″) thick wood trim?

Would 1/4″ thick be enough? From what I have gathered reading online, 3/8″ x 3/8″ is usually used. Have there been any tests done to determine the best thickness?

Thank you in advance.

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  1. GBA Editor
    Martin Holladay | | #1

    I'm interested in your question, and look forward to comments from readers.

    Here's information from the Conservation Technology website:

    "DRYWALL GASKETS: BG32 drywall gaskets are stapled to wall studs, top plates, and bottom plates before drywall is installed in order to prevent air flow between the drywall and the wood. They can be easily installed in any weather, even when wood is cold, wet, or dirty. The head of the seal compresses easily to less than 1/8”, so there is minimal pressure on the drywall. Always screw the drywall where gaskets are used."

  2. dankolbert | | #2

    I've used the gaskets Martin describes several times to good effect. I would encourage you to check them out - their gaskets and products in general are very well thought out and easy to use. The gasket doesn't need to be very thick since the drywall can conform to slight irregularities easily, esp. if screwed.

    All of their gaskets are EPDM, which supposedly won't dry or degrade for far longer than the service life of the other components.

  3. Danny Kelly | | #3

    If you get in a bind, we have ripped down rolls of DOW sill seal and it worked great - readily available, cheap and easy to install.

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