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Thread: Insulating Outlet/Light Boxes

  1. #1
    DIY Senior Member molo's Avatar
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    Default Insulating Outlet/Light Boxes

    Are there any techniques that can be recommended for reducing the draft in a outlet/light boxes (specifically a box with 3 light switches?)

    Thanks,
    Bill
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

  2. #2
    Engineer Furd's Avatar
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    Retrofit is difficult but in new construction use tape to close off all the holes in the box and some spray foam or caulk to seal the wire penetration. Use some siliconized latex caulk to seal between the edge of the box and the drywall.

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
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    They sell inexpensive foam pieces designed to fit over the switch or receptacle. For multi-gang ones, you can overlap them. They'll help with the breeze.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4
    DIY Senior Member molo's Avatar
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    Is Spray foam in the box OK?
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

  5. #5
    Electrical Contractor/Instructor jwelectric's Avatar
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    Quote Originally Posted by molo View Post
    is spray foam in the box ok?
    no .

  6. #6
    Test, Don't Guess! cacher_chick's Avatar
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    If you are really motivated, you might consider opening up the wall to see where all that air is coming from. You may have a big leak or the insulators could have "missed" a stud bay.

  7. #7
    Moderator & Master Plumber hj's Avatar
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    Usually the problem is "OUTSIDE" the box and needs insulation around it.
    Licensed residential and commercial plumber

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