What kind of edging should I use between a patio and a French drain

patio

Here is a diagram of what I am trying to achieve
My patio is pretty much flat. Due to settling the water collects near the wall
Since it is too much work to grade properly the entire patio I think that it would be good to rest the areas where the water collects and to add a french drain between the patio and the wall. The wall is presenting efflorescence due to too much water at the base. The water goes up on the wall due to capillarity pressure.

So ..what sort of can be used between the french drain and the patio (see the picture, the edge pointed by the arrow)

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Edit:

Someone on another site suggested something like this

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Best Answer

Here is an idea that might work for you... enter image description here

Here is a revised drawing added to the first one, with the idea you had given to you and I added where the various barriers need to be. enter image description here

I forgot to note in the drawing that the gray line is the filter cloth.

The full wrap of the plastic membrane will keep the excess water from migrating back to the house. Just placing it against the wall and the bottom will allow it to get to the walls still. Remember it will be a LOT of water concentrated there.

The plastic liner will act as an in ground gutter to move the water, so be sure the bottom is accurately graded towards a place the water can flow that will do the house no harm.

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