Otherwise water moving down the hill will build up behind the wall and undermine it.
French drain along retaining wall.
A locking flange along.
A french drain system is an indispensable component of any subgrade waterproofing project.
If you re building a retaining wall on a hillside if you re building a retaining wall add a french drain behind the first course of stones or blocks.
A french drain is a virtual necessity when building a retaining wall on a hill.
The pipe should rest on the same compacted gravel base or concrete footing that supports the wall.
The size of the gravel used can vary from pea gravel to larger pieces of river rock.
It can help if the natural slope of your property directs water right toward a patio or other outdoor structure.
Pipe drains also known as toe drains are perforated pipes that collect water along the length of the wall and drain it to the outside.
A properly designed french drain reduces the pressure exerted upon retaining walls and subgrade walls that with time can induce moisture inside basements and crawl spaces.
If aggregate of different sizes is used smaller pieces usually go closer to the pipe while larger pieces sit closer to and on the.
Some of these drains are vented through the front of the retaining wall while others may run the length of the wall and drain out to the sides.
Depending on the size of your yard and the scale of your drainage issue you can purchase the pipes and equipment to create a french drain yourself.
French drains can also help divert water when you re building a retaining wall on a steep slope.
A french drain is a trench filled with a perforated pipe and gravel that allows water to drain naturally from your yard.
You can also use a french drain to keep water from pooling in low areas of your yard.
About 8 inches to 2 feet deep should be sufficient for many water diverting projects though related systems such as those built around foundations and sub ground living spaces as well as the bases of retaining walls may be deeper.