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  1. #1
    Join Date
    May 2008

    Default Insulation wiring holes

    I have a home circa 1971 with wiring running into the house through the garage room crawlspace.
    There are several holes with wire running through them.

    I notice that I can feel cool air from the house rushing into the garage roof space via these
    holes in the spring/summer, and I presume cold air rushes into the house in Winter.

    My question is: How can I plus these holes to help seal the house ? I'm got some Dow Enerfoam
    (aka great stuff, I think). But I'm not sure that can be used around electical wires.

    I guess my other option is to manually plug the holes with fiberglass.

    What is the normally accepted solution ?

    I think there is a photo attached. Note that one of the wires
    appears a little frayed. Hence some of the concern.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2
    Join Date
    Apr 2008
    Houston, TX

    Default Re: Insulation wiring holes

    They spray foam insulation will work great. There are no problems with thsi method. As for the frayed electrical line, if you can access it well enough, just wrap some electrical tape around it before using the spray foam.

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