Refer to the diagram of a typical retaining wall drainage system presented here.
Retaining wall drainage gravel size.
It is also used for drainage or as driveway gravel.
One thing to avoid at all costs is lining the back of the retaining wall with plastic.
Typically this gravel ranges in diameter from 2 5 inches 6 35 centimeters to 4 inches 10 16 centimeters.
The wall gets its.
Retaining walls and other features that require drainage make great use of large gravel to allow water to drain away faster than soil would.
Soil holds water so the dirt will expand and contract during winter thus pushing on the wall and eventually toppling it over.
3 4 there are two options at this size clean and dga.
Gravel is necessary for many landscape projects and not just beautiful rock gardens.
5 8 this is also commonly used to mix with asphalt or concrete.
A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it.
This is so that when water gets into the space it does not become bogged down in soil but instead can flow down the wall to the drains or weep holes.
Often retaining walls are used to terrace yards that originally had a steep slope additionally retaining walls can help create usable outdoor space as well as control erosion see landscaping a split level home low retaining walls are frequently used as planting beds and can add interest to an.
3 4 clean is used for drainage behind walls and is also used as fill and for drainage projects such as french drains.
A retaining wall is intended to hold back soil when there is a drastic change in elevation.
Gravel known as size 1 is relatively large.
For proper drainage the first 12 inches of space behind a retaining wall should be filled with crushed stone or gravel.
We go about 6 8 deep behind the wall with loose rock usually crushed.
Estimating stone and gravel for a retaining wall.
Loose gravel and stones don t hold water like soil does.
Design and build your retaining wall to slope at a minimum rate of.
A wall that leans into the soil it retains is less likely to be pushed outward by soil pressure than a plain old vertical wall.
Gravel labeled 411 is usually a mixture of 57 and stone dust and is particularly useful for patching potholes and sealing things like retaining walls.