Drainage channel in raised patio

[moustache]

This is my first post, after recently discovering the website. Hello and thank you in advance!

We are soon to have a conservatory removed from our house (two sides) which leaves behind a concrete base. We plan to use this as a raised patio/seating area but it will need drainage channels along both edges that run alongside the walls of the house (to prevent damp).

I'd appreciate some advice on the best way to approach this. My thoughts were the dig out narrow channels to allow plastic drainage channels to be lowered in. The water could then be sent into a soakaway elsewhere.

Would anyone recommend another option? Perhaps a perforated pipe surrounded by gravel? Or a gulley of some description?

Thanks again.

[seanandruby]

look here
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[moustache]

look here
These are some of the options available to you to read on the main index pages.

That's ideal, thank you