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pex tubing insulation

Brad White_9
Brad White_9 Member Posts: 2,440
split of course :) and as tight as I can get to the OD of the PEX. I specifed it for the homeruns on buried PEX in a radiant floor at Williams College to keep the interior from overheating. Works fine, barely a degree up from the surrounding untubed floor, last I measured.

Comments

  • doug o'connor
    doug o'connor Member Posts: 17


    what is the best insulation to use on pex tubing?
    areas that are not to be heated.
  • Weezbo
    Weezbo Member Posts: 6,232
    couple ideas,...

    one is put the tubes through a much larger tube and insulate that pipe.

    insulate with 1" split foam and spray foam that...

    i let some other people answer then you get conformation or other techniques... *~/:)


  • > one is put the tubes through a much larger tube

    > and insulate that pipe.

    >

    > insulate with 1"

    > split foam and spray foam that...

    >

    > i let some

    > other people answer then you get conformation or

    > other techniques... *~/:)



    I just use 1/2" wall split foam sized to the tube. Seems to work ok.


  • I just use 1/2" wall split foam sized to the tube. Seems to work ok.
  • Tim P._2
    Tim P._2 Member Posts: 47


    I just used tubolit split foam. I also used armoflex when I thought about insulating the pipe prior to making the connections up.

    I believe it's the same ID as copper, eg 1/2 pex requires a 5/8 ID insulation.

    As an aside, if you use the 3/8" thick foam, you can insulate pex that is suspended by pex rails without much trouble.

    Tim
  • hr
    hr Member Posts: 6,106
    Exposed? or in the walls?

    seems the foam type breaks down after a few years in sunlight or UV. If it is exposed and you want nice looking I use the Techlite brand. www.techlite.net Available in many jacket types and colors.

    In walls, crawl spaces, etc I buy the unsplit style Armaflex or other brands and slide it on as I unreel.

    Actually straight lengths of pex or PAP are much easier to insulate and handle. Most radiant manufactures offer 20 foot sticks, these days.

    hot rod

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