How to Build a French Drain
How to create a French drain in a few short steps.
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Step 4: Create a Trench
Using shovel and referring to spray paint marks, dig 6” wide trench with a depth no greater than that of the nearest foundation. TIP: Proper trenches run parallel to buildings and horizontally across slopes.
Step 5: Add Gravel Lining
Once trench is completely dug, add a 3” layer of gravel along bottom.
Step 6: Add Fabric Lining
Use landscape fabric to line entire span of trench atop layer of gravel, leaving roughly 10” excess fabric on each side of trench.