On: How French Drains Work

[daedrdev]

The video also mentions that sometimes the geo textile fabric is not enough since it too can get clogged, though this seems important in dams and not so in simpler projects

[bshacklett → daedrdev]

If you live in a place with a lot of clay, geotextile fabric can certainly be problematic for simple residential settings.

[datavirtue → daedrdev]

The drain pipe is at the bottom of the drainage excavation. On top of the pipe is 3/4 aggragate, and on top of the aggregate is geotextile. Soil is filled in over the geotextile. There is no clogging risk in this design. Any soil particles that make their way to the pipe are carried away.

[cityofdelusion → datavirtue]

Fine clay and silt clogs the geotextile.

A proper drain requires extensive soil testing for particle size. Video goes over this along with the issues of geotextiles.

[datavirtue → cityofdelusion]

Yeah, I saw that video and many others long before it was posted here. I stand by my comment, which is based on experience and reviewing the work of professional drainage installers on YouTube.

No one is doing soil tests for these unless they are installing huge critical commercial infrastructure.