When you’re dealing with retaining walls, drains are an essential part of construction. Without the proper drainage system, you could end up with standing water, uneven ground, and even collapsing walls. For almost every type of retaining wall installation San Diego properties require, a French drain is the key to getting it right. If you want the best possible retaining wall, make sure to include a French drain behind it.
What Does a French Drain Do Behind a Retaining Wall?
This type of drain uses a permeable pipe inside a trench of gravel so it can collect all the water that otherwise runs toward your retention wall. By removing water from the retention wall area, a French drain provides several benefits:
- A longer lifespan for the wall
- More even ground at the top of the wall
- Less discoloration on the wall
- Reduced puddles at the top and base of the wall
What Sort of French Drain Should You Put Behind Your Retaining Wall?
This will depend on the size of the retaining wall. Some walls just need a shallow French drain around 1 foot deep, while others might need trenches at least 3 feet in depth. If your wall is very tall or very long, you might also need multiple drain pipes or drainage holes incorporated into your French drain.
What Happens if You Don’t Have a French Drain Behind a Retaining Wall?
If you’re lacking a French drain, you might not notice issues beside some lingering puddles at first. However, having a lot of waterlogged soil behind a retaining wall can cause issues over time. Your ground might start to dip, and your wall may begin to bow outward. Eventually, a lack of drainage could cause your wall to crumble.
Are There Alternatives to French Drains?
Some types of retaining walls can work well with standard trench drains. However, the gold standard for drainage with any retaining wall is a French drain. It’s the best option because it provides drainage while ensuring stability
If you’re ready to build a retaining wall that lasts, reach out to the professionals at GAIA Builders & Pools. As top-rated experts in outdoor renovation San Diego homeowners have trusted for more than 20 years, we specialize in expertly designed retaining walls with proper drainage systems tailored to your property’s unique needs. Whether you’re starting from scratch or reinforcing an existing structure, our team is here to guide you every step of the way. Contact GAIA Builders & Pools today for a free consultation and let us help you protect your landscape for years to come.
Frequently Asked Questions
Does a 3-foot wall need drainage?
+
Yes. Even if your wall is very short, it’s still worth investing in drainage. A wall of any height can crumble due to moisture.
What’s the difference between trench drains and French drains?
+
A trench drain uses a grate and an empty trench instead of the gravel-and-pipe method used in French drains.
How much does it cost to install a French drain by a retaining wall?
+
Costs for a French drain can vary from around $10 to $100 per foot. Factors such as the depth of the drain and the type of soil will impact costs.
Should you install the drain before or after the wall?
+
For best results, plan drain and wall construction simultaneously. If this isn’t possible, install the wall and then the drain.
