DIYFrenchDrains.com is supported by readers and may earn an affiliate commission.

Rather have a pro do it for you?

Tools and Supplies to Install a French Drain in an Existing Yard
1 Shovel
2 Pickaxe
3 Trenching Spade
4 Wheelbarrow
5 Tarp
6 Tape Measure
7 Level
8 PVC Pipe Cutter
9 PVC Glue
10 Drainage Fabric
11 Gravel
12 French Drain Pipe
13 Landscape Fabric Pins
14 Gloves
15 Safety Glasses

How to Install a French Drain in an Existing Yard

Transform Your Yard with a French Drain: A Step-by-Step Guide to Installation

Installing a French drain in an existing yard can be a great way to prevent water from pooling and causing damage to your property. Here are the steps you need to follow to install a French drain in your yard:

Step 1: Plan the Drainage System
Before you start digging, you need to plan the drainage system. Determine where the water is coming from and where you want it to go. Identify the lowest point in your yard and plan to direct the water towards this point.

Step 2: Mark the Area
Once you have planned the drainage system, mark the area where you want to install the French drain. Use spray paint or stakes and string to mark the area.

Step 3: Dig the Trench
Using a shovel, dig a trench along the marked area. The trench should be approximately 18 inches deep and 8 inches wide. Make sure the trench is sloped towards the lowest point in your yard.

Step 4: Add Gravel
Add a layer of gravel to the bottom of the trench. The layer should be approximately 2-3 inches deep.

Step 5: Install the Drainage Pipe
Place the drainage pipe in the trench on top of the gravel layer. Make sure the pipe is sloped towards the lowest point in your yard. Connect the pipe to any existing drainage systems.

Step 6: Cover the Pipe
Cover the drainage pipe with a layer of gravel. The layer should be approximately 2-3 inches deep.

Step 7: Add Landscape Fabric
Add landscape fabric on top of the gravel layer. This will help prevent dirt and debris from clogging the drainage system.

Step 8: Backfill the Trench
Backfill the trench with soil. Make sure the soil is compacted to prevent settling.

Step 9: Finish the Surface
Finish the surface by adding topsoil and planting grass or other vegetation.

Step 10: Test the Drainage System
Test the drainage system by running water through it. Make sure the water is flowing towards the lowest point in your yard and draining properly.

By following these steps, you can install a French drain in an existing yard and prevent water from causing damage to your property.