What garden patio drainage?

12 Dec 2013
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United Kingdom
Hello all
  • I have built a new single storey rear extension.
  • I wish to landscape the rear garden.
  • The soil is heavy clay.
  • The garden slopes towards the house
I am proposing a patio 6m wide and 3m from rear of house to garden. Thereafter I wish to add 3 steps UP into the garden.

To create the patio I wanted to use timber decking above the ground level to sit just under the bi-fold threshold (all weather).

What drainage is recommended to disperse surface water in under these conditions?
Please let me know if you need any further info.

Many thanks in advance
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Decking is obviously porous so its just an issue of dealing with the water underneath? What is the existing surface the decking is going over?

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