Question by  mukeshmscit (63)

What is a good french drain depth?

I need to put one in.


Answer by  Cheri99 (187)

Eighteen to Twenty-Four inches works well. The most important thing to remember is to install the pipe so that is has a slight downward slope towards your discharge point.


Answer by  Ken99 (281)

generally a depth of eight to twleve inches is usually an adequate depth. More important is the the grading in the trench, completely flat and it won't drain.


Answer by  Learner (350)

Usually digging about 12 to 18 inches in depth and about 6 inches in width is considered to be good enough for french drain.


Answer by  rdevault (24)

install your french drain below foundation level got a basement? an accepticable 16 in below foundaion keep in mind the soil drainage dont go to shallow or to deep


Answer by  kendall (95)

The trench for the drain six inches wide and ten to twelve inches deep. Make sure to take note of the slope for the water to drain properly.

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