Drainage Systems, French Drains, Surface Drains, Channel Drains, Sump Pumps,
A Channel Drain is a type of Surface Drain and many times is installed in concrete across sidewalks or driveways. It is long and narrow with a grate on top.
A French Drain is completely different from a Surface Drain. A basic French Drain consists of a Perforated Drainpipe in the bottom of a trench. A Trench Liner is sometimes used depending on the Drainage System Design and the type of soil. The Drainpipe should have a neoprene sock around the Perforated Drainpipe. This is to ensure that the Drainpipe does not become clogged. A trench is dug that is slightly wider than the French Drainpipe that is being used. There are several sizes of French Drainpipe. Three Inch, Four Inch, and Six Inch are the most common sizes of French drainpipe. The dirt that is taken out to make the trench is hauled away. It is replaced by some type of small stone or gravel depending on what is desired or available. I prefer crushed 1 inch limestone. It is the most economical option in my area. Pea Gravel or some other type of small stone can work just as well. The limestone or gravel is placed in the trench on top of the perforated Drainpipe and filled all the way to the surface (ground level). In some cases where the French Drain needs to be deep or is being placed in sandy soil, a special trench liner must be placed in the trench before the perforated Drainpipe, or the Gravel are installed. This helps maintain the integrity of the trench over time. It also increases the cost of the French Drain and the amount of time to install it. I install a trench liner in a French Drain about 20% of the time. Most of the time a liner in not needed.























