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  • Insulating Pipe

    Supplys for a basement shower are in the same joist cavity as HVAC run. They also travel a short distance on the warm side of exterior wall (though wall is to R12 insulated ). I have wrapped the majority of the copper with insulating sleves however there is some portions of the pipe that is flush with the joist hence the sleve wont fit....Could I simply spray these sections with a canned spray foam such as Dow Great Stuff. My logic would be to guard against any possibilty of a pipe freezing and in the summer months to avoid any condesation isssues with the pipes that share the same cavity as the HVAC run.

  • #2
    Re: Insulating Pipe

    Anyone care to take a shot on above question? Bascially want to know if those insulating sleeves actually do something and whether spraying Dow canned expanding foam on the supply lines where I cant fit the sleeve over as their flush with the joist.....would be ok?

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    • #3
      Re: Insulating Pipe

      well i will shoot
      first they should not have ran the water lines and the AC in the same joist space

      depending on the type of pipe insulation and how thick it is will make a big difference

      the spray foam is good to use for air gaps and to seal off an opening
      Charlie

      My seek the peek fundraiser page
      http://observatory.mountwashington.o...nal&fr_id=1040


      http://www.mountwashington.org/weather/conditions.php

      new work pictures 12/09
      http://public.fotki.com/hvachawk/

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      • #4
        Re: Insulating Pipe

        Ok so the foam is a good idea..good to hear. I mispoke the lines are not in the same joist run as the HVAC supply....but in a joist with a canned light...How close can the sleeve foam be to the canned light. And is there any reason not to encase the 1 water line thats flush with the joist with canned foam...
        Last edited by fall50; 04-11-2009, 07:52 PM.

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        • #5
          Re: Insulating Pipe

          the light may get hot so i would keep it away a little
          and i would take the water line that is strapped to the joist and re hang it so you can use the regular insulation
          Charlie

          My seek the peek fundraiser page
          http://observatory.mountwashington.o...nal&fr_id=1040


          http://www.mountwashington.org/weather/conditions.php

          new work pictures 12/09
          http://public.fotki.com/hvachawk/

          Comment


          • #6
            Re: Insulating Pipe

            Just take a piece of insulation and cut it 1 1/2" long, then cut in in half so its a semi-circular shape. Tape it in place meticulously with foil tape, and it will be much neater than spray foam. Use foil tape on all of your joints and make sure to miter the corners and cut appropriate holes for the tees. The box of pipe insulation usually has a template on it for this. Good luck!

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