Can french drains be added to a concrete patio, after the fact to fix flooding issues?


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An easy way to create a drainage channel along its edge is by moulding a concrete strip using a length of plastic guttering.

  1. Top tip - Drainage in the middle of a patio. ...
  2. Put a length of timber the required distance from the paved surface (in this case, slightly wider than the guttering used to mould the channel).

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