Retaining Wall Drainage Gravel Size
Gravel known as size 1 is relatively large.
Retaining wall drainage gravel size. Typically this gravel ranges in diameter from 2 5 inches 6 35 centimeters to 4 inches 10 16 centimeters. 5 8 this is also commonly used to mix with asphalt or concrete. Retaining walls and other features that require drainage make great use of large gravel to allow water to drain away faster than soil would. 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.
The quantity of drainage gravel used will vary depending on the height of the wall and the amount of water runoff expected but as a general rule the more gravel used the better. Estimating stone and gravel for a retaining wall. 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. For proper drainage the first 12 inches of space behind a retaining wall should be filled with crushed stone or gravel.
4 tips to building the best retaining wall use crushed stone behind the wall. Soil holds water so the dirt will expand and contract during winter thus pushing on the wall and eventually toppling it over. Design and build your retaining wall to slope at a minimum rate of. It is also used for drainage or as driveway gravel.
Gravel is necessary for many landscape projects and not just beautiful rock gardens. Refer to the diagram of a typical retaining wall drainage system presented here. A retaining wall is intended to hold back soil when there is a drastic change in elevation. One thing to avoid at all costs is lining the back of the retaining wall with plastic.
A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it. We go about 6 8 deep behind the wall with loose rock usually crushed. 3 4 there are two options at this size clean and dga. When you re doing a diy landscape project it s important to choose the right type of gravel.
The wall gets its. 3 4 clean is used for drainage behind walls and is also used as fill and for drainage projects such as french drains.