Expanding foam on underslung tanks

Discussion in 'Motorhome Chat' started by Welsh girl, Aug 25, 2013.

  1. Welsh girl

    Welsh girl Funster Life Member

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    Can you use expanding foam to spray on our underslung water and waste tanks to insulate them ?
    What else do people use?
     
  2. motorhomelover

    motorhomelover

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    The yank tanks have foam every where. So I would say yes.
    It's messy to do so I would say No
    So it's up to you
     
  3. jonandshell

    jonandshell Funster

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    Ah, but if they do freeze, they'll be a bugger to thaw out!:Smile:
     
  4. motorhomelover

    motorhomelover

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    Very true

    But what an excuse to drive down to Spain to thaw em out :Rofl1:
     
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  5. Terry

    Terry Funster

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    If you buy a foam gun and gun applied foam (cheaper) you can control where you spray it quite easy - once it cures you can then trim it with a saw :thumb:
    http://www.toolstation.com/shop/Professional+Foam+Gun/p93227
    you can find cheaper guns and foam but this save looking around and not that expensive :Wink:
    Once used leave the can on the gun it will be OK after a year or more ---not sure on insulation propertys of the foam but it will be a lot better than nothing :BigGrin:
    terry
     
  6. Larrynwin

    Larrynwin Funster

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    Self adhesive 12v tank heaters :thumb:
     
  7. Vlad The Impaler

    Vlad The Impaler Funster

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    Expanding foam can get easily get waterlogged so if used it would be a good idea to seal it with a bitumen paint of some sorts


    Vlad.
     
  8. TheBig1

    TheBig1 Funster Life Member

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  9. Gromett

    Gromett Funster

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    3 problems with the single tin types of spray on foam;

    1) It is not 100% closed cell so will get waterlogged as previously stated.
    2) It is not fire retardant. If you need some welding done underneath at a later date it is a git to remove first. If you don't you will end up with lots of nice little camp fires all over the places where you don't want them.
    3) Spraying it on is a pain in the arse as it goes everywhere BUT where you want it to go. (2 part urethane foam is much better)

    Personally if it was me I would look at insulation that comes in rolls or sheets. I would also look at some kind of 12v heating element.

    I haven't bothered on mine. When it gets cold I detach the pipes as they come out from the van and put separate buckets under each one which get emptied very regularly. As a full timer I found that underneath is no place for water no matter how much insulation you have, it will always eventually freeze.
     
  10. ukbill

    ukbill Funster

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    see if u can wrap it with a cylinder jacket much better insulation
     
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  11. jonandshell

    jonandshell Funster

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