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Community and Q&A

Filling a large gap in insulation

USH2x77mKd | Posted in Energy Efficiency and Durability on

I’m removing an old intercom system from a clients house as part of a small remodel. One of the intercom units is on an outerwall (in an area of the house that I’m not otherwise working on). I removed the unit and to my dismay there wasn’t any insulation. There is insulation throughout the rest of the wall. The original builder must have not put insulation between the studs on this section to leave room for the wiring of the intercom (I know. Really?). I’d rather not take down the wall board, mostly so I don’t have to touch this part of the house to keep the costs down.

Any suggestions for how to fill this gap without removing the wall board?

Thanks, JB

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  1. GBA Editor
    Martin Holladay | | #1

    The best way to insulate an empty stud bay is will dense-packed cellulose. You can rent a cellulose blower from most big-box lumber yards.

    If that seems too much trouble to you, you might find it easier to cut out a section of drywall, insulate with fiberglass batts, and patch the drywall. Your choice.

    If I were you, I'd hire a home energy rater to visit the home with an infrared camera on a cold day. You might be surprised to discover that your builder left out the insulation in more than one stud bay.

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