We re pulling all this out.
Retaining wall french drain design.
If you re building a retaining wall add a french drain behind the first course of stones or blocks.
These can be led directly into the dry well.
Next the trench should be lined with ground sheeting this is available at most builders merchants.
A french drain is a virtual necessity when building a retaining wall on a hill.
Install french drains at the foundation perimeter of your house.
It should be located on the uphill side of the wall so it can catch water running down the hill and prevent it from undermining the wall.
Otherwise water moving down the hill will build up behind the wall and undermine it.
The stone is just deteriorating.
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.
The proper drainage behind a natural stone wall is extremely important.
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 design of a properly built retaining wall resists the force of the soil behind it and prevents caving buckling or leaning.
The photos we show in this article show a french drain being constructed behind a low retaining wall.
The size of the gravel used can vary from pea gravel to larger.
I think you are on the wrong side of that retaining wall.
Let me show you what happens after 19 years.
In this blog post we ll be discussing french drains and drywells and how to install them correctly.
We re going to keep the good stones and use them for the rebuild.
Check out this video for some simple instructions on installing a french drain behind an 18 to 24 tall retaining wall before it is backfilled with dirt.
A drainage system can have many different components including a french drain drywell closed tubing catch basins and pop up emitters.
One of the most popular fix to these yard drainage problems is a french drain as part of a drainage system.
If you re building a retaining wall on a hillside.
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.
Why you need a french drain behind your retaining wall.
You want to intercept the water in the soil before it reaches any structure that water will corrode or erode.
The pipe should rest on the same compacted gravel base or concrete footing that supports the wall.
However retaining walls are built with a certain capacity in mind.