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Thread: Air Sealing Electrical Boxes (Expanding Foam.)

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  1. #1
    DIY Senior Member molo's Avatar
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    Default Air Sealing Electrical Boxes (Expanding Foam.)

    Hello,

    I'm working on a new renovation with new wiring and access to the open framing. I would like to prevent air leakage around all electrical boxes.

    One thought I have is to use expanding foam around the outside of the boxes. Is this OK?

    Thanks in Advance,
    Bill
    Last edited by molo; 06-24-2012 at 09:18 PM.
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

  2. #2
    Electrical Contractor/Instructor jwelectric's Avatar
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    Default

    Depends on the foam
    read the instructions

  3. #3
    DIY Senior Member Homeownerinburb's Avatar
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    Quote Originally Posted by molo View Post
    Hello,

    I'm working on a new renovation with new wiring and access to the open framing. I would like to prevent air leakage around all electrical boxes.

    One thought I have is to use expanding foam around the outside of the boxes. Is this OK?

    Thanks in Advance,
    Bill
    There are specific foams for closing holes drilled to chase NM thru framing. Look at some of that.

  4. #4

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    Quote Originally Posted by Homeownerinburb View Post
    There are specific foams for closing holes drilled to chase NM thru framing. Look at some of that.
    Anyone know what this foam is and where it can be found?
    If I remember correctly, my memory is excellent, but my ability to access it is not.

  5. #5
    DIYer, not in the trades LLigetfa's Avatar
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    Default

    Google is your friend. Search for:

    fireblock foam electrical

  6. #6
    DIY Senior Member Homeownerinburb's Avatar
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    Quote Originally Posted by LLigetfa View Post
    Google is your friend. Search for:

    fireblock foam electrical
    Amen.

    I saw rows and rows of it at Home Despot just yesterday.

  7. #7
    DIY Senior Member molo's Avatar
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    I talked to a rep. at Dow today. They said that their standard "great stuff" foam is OK around electrical boxes and insulated wires. However, it is not OK inside the box or in contact with bare copper.
    "Any American who is prepared to run for President should automatically, by definition, be disqualified from ever doing so."
    Gore Vidal.

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