|Waterproofing the containers.|
Tom applying the first coating.
A French drain (also known as rubble, blind, rock or tile drain) is a trench covered with gravel or rock used to keep ground water away from an area. A pipe perforated on the bottom allows water to seep up into it which will then drain off in another area.
As you can see, we are covering the pipe with a cheese cloth-like product which allows water in and keeps dirt and such out of the pipe preventing clogging. This is an important step if you elect to use a french drain.