Fill the trench with topsoil and compact to completely cover the entire french drain system.
French drain around patio.
Leave approximately 5 between top of gravel and ground surface.
To build a french drain choose a spot with a slight downhill slope then dig a trench that is about 6 inches wide and 18 to 24 inches deep.
But this can also make it prone to leaks and tears.
Use stakes to indicate the drain s path.
The french drain should run from the patio area where the water pools to a lower spot on your property.
Place drain pipe atop fabric lining then add gravel covering pipe completely.
The old way of installing french drains is to do it without the gravel and the fabric.
Filling and piping a french drain after.
When filling the area around the inlet grate temporarily cover the grate to prevent any stones or soil from falling in.
Line the trench with water permeable landscape fabric leaving at least 10 inches of excess fabric on either side of the trench.
The most reliable way to eliminate undesirable free standing water is to install french drains with slotted pipes filter fabric and gravel.
Corrugated pipe is usually easier to work with than pvc pipe as it is more flexible and bendable.
If you need a french drain that can snake around trees or landscaping use corrugated pipe.
If you re installing a french drain around your foundation to prevent basement moisture take care to position the pipe below slab or finished floor level.
Without the gravel and the fabric however the drain can clog up with sand and soil over time.