How the French Drain and Channel Drain Worked Together
The homeowners were dealing with water collecting beside their Des Peres home during storms. Runoff was moving toward the garage entrance and along the foundation, creating two related drainage problems that needed to be addressed before the water reached the structure. Simply changing the surface grade would not provide the collection points needed in both areas, so the project required a drainage system designed around the different ways water was approaching the home.
Along the side of the house, water needed to be collected before it continued toward the foundation. A French drain was selected for this part of the property because it could intercept water within the ground and give it a defined underground route away from the home. At the garage, however, the problem involved surface runoff approaching across the driveway. That required a different collection method.
Combining the two systems allowed each drain to handle the type of water reaching its location. A channel drain was installed at the garage entrance to intercept surface runoff before it crossed the threshold, while the French drain collected water along the foundation. Both systems could then connect with underground drainage piping that carries the collected water away from the house.
Installation of the French drain began by excavating a trench alongside the foundation. Perforated drainage pipe was placed on a prepared gravel base and surrounded with clean drainage stone so water could move into the system. Filter fabric was incorporated to help separate surrounding soil from the drainage material, and decorative river rock completed the finished surface once the underground work was in place.
The completed project included:
- French drain installed along the side of the home
- Perforated drainage pipe surrounded by clean drainage gravel
- Filter fabric incorporated into the French drain installation
- Channel drain installed at the garage entrance
- Underground PVC piping carrying collected water away
- Decorative river rock finishing the drainage area
- Foundation and garage drainage addressed as one coordinated system
- Completion in approximately two working days
The important part of this project was recognizing that one type of drain would not address both water paths equally well. The French drain was positioned to collect water along the foundation, while the channel drain was placed where surface runoff approached the garage. Connecting both to the underground drainage route allowed the different collection points to function as one system.
Once installation was complete, the drainage work was largely hidden from view. The river rock creates a clean finished area beside the house, while the French drain continues working below the surface. At the garage, the channel drain remains positioned to intercept runoff before it reaches the entrance.
The homeowners now have a defined way to collect and redirect water that had previously been moving toward the home. Instead of relying on water to disperse naturally beside the foundation and garage, the property has dedicated collection points and underground piping designed around the actual paths the runoff was taking.
The construction details above, including the French drain, channel drain, perforated pipe, gravel, filter fabric, underground piping, and river-rock finish, are all supported by the published project information.