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  1. #1
    Join Date
    Mar 2010
    Posts
    6

    Default Insulating around Water Heater exhaust pipe

    Can I use Cotton insulation around the exhaust pipe that runs through my garage ceiling?

  2. #2
    Join Date
    Feb 2010
    Location
    Eastern MA
    Posts
    75

    Default Re: Insulating around Water Heater exhaust pipe

    No. Use a fire rated product like Therma-fiber.

  3. #3
    Join Date
    Mar 2010
    Location
    VA
    Posts
    5

    Default Re: Insulating around Water Heater exhaust pipe

    Here we have to use double wall pipe through all combustibles

  4. #4
    Join Date
    Feb 2010
    Location
    Eastern MA
    Posts
    75

    Default Re: Insulating around Water Heater exhaust pipe

    I was assuming the code approved pipe was being used, as crabber recommends. I would still want 2 inches of fire rated material separating the pipe from combustibles.

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