How to Install a French Drain in a Slope

Installing a French drain in a slope can be a challenging task, but with the right approach and tools, it can be done effectively. Here is a step-by-step guide on how to install a French drain in a slope:

Step 1: Determine the Location of the Drain
The first step is to determine the location of the drain. Identify the area where water is collecting and where the slope is the steepest. This is where the French drain should be installed.

Step 2: Dig a Trench
Using a shovel, dig a trench along the slope where the French drain will be installed. The trench should be approximately 12 inches wide and 18 inches deep. The length of the trench will depend on the size of the area that needs to be drained.

Step 3: Create a Slope
The bottom of the trench should be sloped towards the area where the water will be drained. A slope of 1/8 inch per foot is recommended. This will ensure that water flows towards the drain.

Step 4: Add Gravel
Add a layer of gravel to the bottom of the trench. The gravel should be approximately 3 inches deep. This will allow water to flow freely through the drain.

Step 5: Install the Drain Pipe
Place the drain pipe on top of the gravel. The drain pipe should be perforated and have a sock around it to prevent debris from entering the pipe. The sock should face upwards.

Step 6: Cover with Gravel
Cover the drain pipe with gravel. The gravel should be approximately 3 inches deep. Ensure that the gravel is evenly distributed.

Step 7: Cover with Fabric
Cover the gravel with a layer of fabric. This will prevent soil from entering the drain and clogging it.

Step 8: Backfill the Trench
Backfill the trench with soil. Ensure that the soil is compacted and level with the surrounding area.

Step 9: Add a Drainage Outlet
At the end of the drain pipe, add a drainage outlet. This can be a pop-up emitter or a catch basin. The drainage outlet should be located in an area where water can flow freely away from the property.

Step 10: Test the Drain
Test the French drain by pouring water into the trench. Ensure that water flows freely through the drain and exits through the drainage outlet.

In conclusion, installing a French drain in a slope requires careful planning and execution. By following these steps, you can effectively install a French drain that will prevent water from collecting and damaging your property.