Install french drains at the foundation perimeter of your house.
Retaining wall french drain design.
We re pulling all this out.
The design of a properly built retaining wall resists the force of the soil behind it and prevents caving buckling or leaning.
Drain pipes go behind the wall on the side with the surcharge the soil that that wall or foundation is holding back.
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.
In this blog post we ll be discussing french drains and drywells and how to install them correctly.
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.
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.
A french drain is a virtual necessity when building a retaining wall on a hill.
Why you need a french drain behind your retaining wall.
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.
You want to intercept the water in the soil before it reaches any structure that water will corrode or erode.
The stone is just deteriorating.
These can be led directly into the dry well.
I think you are on the wrong side of that retaining wall.
The pipe should rest on the same compacted gravel base or concrete footing that supports the wall.
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.
Next the trench should be lined with ground sheeting this is available at most builders merchants.
The size of the gravel used can vary from pea gravel to larger.
Let me show you what happens after 19 years.
If you re building a retaining wall on a hillside.
We re going to keep the good stones and use them for the rebuild.
The photos we show in this article show a french drain being constructed behind a low retaining wall.
If you re building a retaining wall add a french drain behind the first course of stones or blocks.
Why proper drainage is important for retaining wall performance.
The proper drainage behind a natural stone wall is extremely important.