A french drain is a virtual necessity when building a retaining wall on a hill.
Retaining wall french drain design.
The design of a properly built retaining wall resists the force of the soil behind it and prevents caving buckling or leaning.
The proper drainage behind a natural stone wall is extremely important.
However retaining walls are built with a certain capacity in mind.
Let me show you what happens after 19 years.
Otherwise water moving down the hill will build up behind the wall and undermine it.
In this blog post we ll be discussing french drains and drywells and how to install them correctly.
We re pulling all this out.
The photos we show in this article show a french drain being constructed behind a low retaining wall.
One of the most popular fix to these yard drainage problems is a french drain as part of a drainage system.
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.
Next the trench should be lined with ground sheeting this is available at most builders merchants.
However if you do this the size of the dry well will have to accommodate more water and the dimensions will be different than if it was needed only for the retaining wall piping.
We re going to keep the good stones and use them for the rebuild.
Install french drains at the foundation perimeter of your house.
First you need to dig a trench behind the wall about 15cm wide and as deep as required with a fall off 1 in 100 so that the water flows.
The size of the gravel used can vary from pea gravel to larger.
The pipe should rest on the same compacted gravel base or concrete footing that supports the wall.
A drainage system can have many different components including a french drain drywell closed tubing catch basins and pop up emitters.
The stone is just deteriorating.
A retaining wall is built to hold back a certain amount of soil.
You want to intercept the water in the soil before it reaches any structure that water will corrode or erode.
Why proper drainage is important for retaining wall performance.
These can be led directly into the dry well.
If you re building a retaining wall add a french drain behind the first course of stones or blocks.
Why you need a french drain behind your retaining wall.
I think you are on the wrong side of that retaining wall.
If you re building a retaining wall on a hillside.