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Pea shingle drainage question

Discussion in 'Building' started by jmaxwell, 19 Sep 2011.

  1. jmaxwell

    jmaxwell

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    There is a trench next to my house that was put in by previous owners to reduce damp, I want to fill this with 20mm pea shingle. In local builders' merchants and DIY stores, the shingle comes unwashed – there is evidence of sand/silt in every bag. Does this negatively affect drainage?
     
  2. theoldun

    theoldun

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    You have two choices, put it in the bath and wash it, better still throw it in trench and let the rain and natural side percolation do the job for you. Will soon wash sand and silt to bottom. You can buy 10 ton loads direct from the pit and they will put the fire hose in back of lorry with back tipped up slightly to drain out, how ever they will charge you for water used and time lorry sits in quarry waiting to drain out before going on public highway.
    Be sure to line trench with Geotextile terram before throwing shingle in other wise shingle will be full of top and sub soil in 12 months.
    oldun ;)
     
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  4. jmaxwell

    jmaxwell

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    The side of the trench is actually a concrete retaining wall. Only the base is earth. Can I do without terram?
     
  5. theoldun

    theoldun

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    Yes
    oldun ;)
     
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