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  1. #1
    Join Date
    Apr 2012
    Location
    Northern Virginia
    Posts
    140

    Default Insulation for Baseboard Water Circulation Pipes

    Recent posters and the recent cold weather here prompted me to ask this question. What's the best insulation material & technique for exposed hydronic heat water pipes ??

    My house is cape-cod style (it's actually a brick Williamsburg type) with the 2nd floor in the attic.

    I recently went exploring the attic after moving in about 20 months ago. The circulating pipes for the baseboard heating for the 2nd floor run around the perimeter of finished space (unfinished on the attic side). The original insulation appear to PAPER constructed in honeycomb/open cell, and about 1-inch thick. On the long runs, the insulation tubes are clamped by metal bands, although the middles are unclamped & exposing a lot of pipe. The bends are insulated by the same material but held by duct tape, and the tape is failing.
    Overall, the hot water pipes seem to be heating the attic as much as the interior, finished space.

    One of the moderators mentioned polyfoam insulation - the gray foam stuff at Home Despot ?? I'm also thinking plastic tie bands and metal foil tape to secure new insulation. The water tempuratures are, I think, 160 degrees in, and 120 degrees out.

    Is removing the old insulation safe (asbestos ??) -- 1964 . . .

  2. #2
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,363

    Default Re: Insulation for Baseboard Water Circulation Pipes

    If its a fairly hard, grey, fiberous material it can be asbestos. If its yellow (or was once yellow) its fiberglass. You may fare better by adding blown in insulation over the top of everything including the pipes. Otherwise your plan is solid.

  3. #3
    Join Date
    Sep 2012
    Location
    Boston
    Posts
    821

    Default Re: Insulation for Baseboard Water Circulation Pipes

    sounds like asbestos to me me.....get it checked before you remove it

  4. #4
    Join Date
    Dec 2010
    Location
    Houston Texas
    Posts
    2,363

    Default Re: Insulation for Baseboard Water Circulation Pipes

    If its asbestos, that's another good reason to leave it alone and cover everything with new insulation.

  5. #5
    Join Date
    Feb 2013
    Posts
    6

    Default Re: Insulation for Baseboard Water Circulation Pipes

    I wouldn't mess with it without a pro to determine if it is asbestos. That stuff is a killer.

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