These are installed at North Metro Atlanta homes that have soggy lawns with poor grading, or wet basements and crawl spaces. They are sometimes referred to as agricultural, land, rubble, perimeter, sub-soil, or rock drains. Whenever it rains, or you have melting snow on your property, the moisture flows downhill and it can accumulate next to your exterior foundation walls, or in low-lying areas of your lawn. This isn't just an eyesore, but it can also seep into the soil and cause problems for your existing landscaping, or it may actually find its way into your home via basement wall or floor cracks. This can lead to expensive and serious damage.
What Do They Do?
They provide an easy channel for moisture to flow through. This water will run through the trench and into a perforated pipe which will then empty a safe distance away from the home and low-lying areas of the lawn. This means that you will never again need to deal with giant puddles or ponds of water which have built-up on your lawn.
The trench should be sloped about an inch for every 8 feet in the direction you want the moisture to flow.
The water will be able to be diverted to:
- Drainage ditches
- Dry wells
- The city's sewage system
Building a Retaining Wall
If you are getting a decorative wall installed on your property, you are going to need a French drainage system set up. It should be placed behind the first set of stones or blocks in the wall. If you choose to not get one put in place, water flowing down the hill will build-up behind the wall. Eventually, this will either cause serious problems with erosion, or it may damage the retaining wall to the point of needing certain sections replaced.
In order to keep the drain clog-free, landscape cloth can be used at the base or footing and installed up the slope before the pipe and drain gravel are installed.