Make sure the corrugated pipe has slots so it can drain properly.
French drain around patio.
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.
Dig a channel or trench to a depth of about 18 to 24 inches and depending on the size of the drainage pipe 6 to 12 inches wide.
But this can also make it prone to leaks and tears.
The most reliable way to eliminate undesirable free standing water is to install french drains with slotted pipes filter fabric and gravel.
The french drain should run from the patio area where the water pools to a lower spot on your property.
The old way of installing french drains is to do it without the gravel and the fabric.
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.
Leave approximately 5 between top of gravel and ground surface.
Without the gravel and the fabric however the drain can clog up with sand and soil over time.
Use stakes to indicate the drain s path.
If you need a french drain that can snake around trees or landscaping use corrugated pipe.
Place drain pipe atop fabric lining then add gravel covering pipe completely.
Filling and piping a french drain after.
Fold over excess fabric lining fold excess fabric over gravel creating an overlap.
When filling the area around the inlet grate temporarily cover the grate to prevent any stones or soil from falling in.