How Deep Should a French Drain Be?
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Average Depth
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A depth of between 8 and 12 inches---and a width of 5 to 6 inches---will work fine for most yards.
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Depth Can Be Relative
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If your yard defies classification as average, survey how much water accumulates and what the slope of your lawn is, then estimate accordingly. If you wish to use a drain pipe, increase the depth by several inches.
Bottom Line
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If you are still uncertain about your drain plans, contact a surveyor for advice. However, the dimensions of a French drain need not be completely accurate or painfully specific. An average depth of 8 to 12 inches will work to efficiently drain most yards and may be used as a reference point.
References
- Photo Credit grass image by Alison Bowden from Fotolia.com
