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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Green Living: Disposing of used expanding foam cans

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  1.  
    • CommentAuthorringi
    • CommentTimeSep 28th 2015 edited
     
    I am going to have lots of empty expanding foam cans, how do people dispose of them? It is a shame just to send metal cans to landfill, but I don’t know if replying companies will like them in our recyle bin.
  2.  
    take them up the tip and stick them in the metal mix bin or to a scrap yard , there a of of mixed wasted at my local metal recyclers where I trade in copper etc. any thing I cant sell the just goes in the big pile
  3.  
    Doesn't your Council have a recycling centre that takes all sorts of hazardous waste such as these cans? Mine has a bin specifically for used or partially used expanding foam cans along side those for various other household chemicals, paints etc.
    •  
      CommentAuthordjh
    • CommentTimeSep 29th 2015
     
    Posted By: Chris P BaconDoesn't your Council have a recycling centre that takes all sorts of hazardous waste such as these cans? Mine has a bin specifically for used or partially used expanding foam cans along side those for various other household chemicals, paints etc.

    :rolling: :rolling: :rolling:
    • CommentAuthorrhamdu
    • CommentTimeOct 3rd 2015
     
    I empty them - until no more foam or gas comes out - and put them in the same bin as aerosol cans. I assume they will be picked out by magnet and sorted with other scrap steel.

    That's probably completely wrong, but it seems to me that an empty expanding-foam can is a lot less hazardous than a part-full can of hair spray.
    • CommentAuthorcjard
    • CommentTimeOct 4th 2015
     
    Stand em upright for a while then pierce the side of them near the top with a nail, then recycle.if you care enough once the remaining foam has cured inside cut em open and separate the metal from the foam and dispose each accordingly
    •  
      CommentAuthorfostertom
    • CommentTimeOct 4th 2015
     
    You mean that once started, contents eventually solidify in the can?
    • CommentAuthorcjard
    • CommentTimeOct 4th 2015
     
    Once you punch a hole in them, yep. I think some combination of pressure and solvent keeps the liquid in the can from reacting and producing foam. Remove the pressure/solvent and they turn into a block of foam the shape of the can. I say to stand them up a while so the liquid collects at the bottom. It makes a considerable mess if you punch a hole in them at the top when you just took it out of the gun (I.e. An inverted position). You can of course, punch the bottom but then standing them up is a ball ache

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