A french drain is a gravel filled trench that directs water away from an area where it accumulates and disperses it somewhere more appropriate.
Best gravel for french drain.
French drain gravel should be washed three quarter inch minimum and as large as 1 crushed stone.
For a french drain without a perforated pipe opt for even larger gravel such as 1 1 2 inches across.
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Areas that will see especially heavy flow may need larger gravel.
The simplest french drain consists solely of a.
You re taking in the water throughout the entire system.
As its name implies shell gravel is made up of ground shells and other natural materials found on beaches and in coastal areas.
No matter what the gravel or stone opt for washed varieties otherwise fine dust and particles may hinder or even stop water flow.
Or projects without drainage pipes may also need larger gravel.
Though more expensive complicated and time consuming using both pea gravel and stone together is one of the best ways to form a french drain.
This type of natural gravel can be used in the same manner as crushed rock and is most commonly used in the regions where it is produced.
Smaller gravel such as pea gravel would not allow sufficient water flow.
Pea gravel is laid first then your pipe.
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For example a french drain without perforated pipe needs 1 inch gravel.
Being careful not to injure the pipe drainlayers form a layer of larger stone on top of the pipe then finish with a layer of pea gravel.
In general you want to aim for inch to 1 inch gravel for drainage.
French drain gravel.
This type of gravel made from machine crushed stone is also a popular choice for landscape design and for constructing french drains as the size and shape of the rock fragments promotes proper.
You can t beat a gravel french drain.