French Drain

30 May 2005
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United Kingdom
I have spent the last 2 days & nights digging drains into the garden! Followed instructions from a french drain website! I now have water filled ditches with a murky swimming pool at the bottom of the swamp! The soil is waterlogged with a layer of what looks like clay a 1ft depth the a compacted sand layer another few inches down.......... the field behind is a few inches above the garden...
Do I need to raise my garden??
What substrates should I use??
Or should I just dig a swimming pool?
Help!!!!!! :cry: :cry: :cry: :cry:
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where are you intending to drain the water to? its all very well digging the trench system but it needs to go somewhere. ie a soakaway
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How deep should the soakaway be? I have already dug one but I fear it is not deep enough :cry:
Depends on conditions. If you're getting flood it probably means not deep enough, or not penetrating non-permeable layer? Also, you have to have fall from FD to soakaway.

Percolation test is best way of predicting soakaway depth required (see

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