A French drain is a gravel-filled trench with a perforated pipe that collects standing water and carries it to a safe discharge point. Idaho Sprinkler Repair installs French drains and full yard drainage in Boise, Meridian and across the Treasure Valley. In Ada County’s clay soils, water sits on the surface instead of soaking in.
What Is a French Drain?
A French drain is a gravel-filled trench containing a perforated pipe that redirects surface and subsurface water away from problem areas. Named after Henry French who popularized the design in the 1800s, it remains the most effective and durable solution for water management in residential and commercial landscapes.
In Idaho’s clay-heavy Treasure Valley soils, water often pools on the surface because it cannot percolate through the ground quickly enough. French drains collect this water and channel it safely to a discharge point—a storm drain, dry well, or lower area of the property.
Signs You Need a French Drain
- Standing water that remains in your yard for hours or days after rain or irrigation
- Soggy, spongy, or muddy lawn areas that won’t dry out
- Water pooling near your home’s foundation, creating flood risk
- Basement or crawlspace moisture, dampness, or seepage
- Erosion on slopes, hillsides, or along driveways
- Landscape beds that stay wet and drown plant roots
- Water running toward the house during storms
Our Yard Drainage Services in Boise and the Treasure Valley
Idaho Sprinkler Repair designs and installs complete drainage systems tailored to your property’s specific water management needs:
- French drains — perforated pipe in gravel trench for subsurface drainage
- Surface channel drains — linear drains for hardscape runoff on driveways and patios
- Catch basins — collection basins with grated covers for concentrated drainage points
- Dry creek beds — decorative natural-looking drainage channels that become landscape features
- Swales and berms — graded earthwork to redirect water flow away from structures
- Downspout extensions & pop-up emitters — routing roof runoff away from the foundation
French Drain Installation Process
- Site assessment — We evaluate drainage patterns, soil type, slope, and water source
- Design & planning — We design a drainage solution with correct depth, slope, and discharge point
- Utility locating — We call 811 to locate underground utilities before any digging
- Trenching — We excavate the trench to proper depth and grade
- Fabric & gravel installation — Landscape fabric lines the trench, followed by washed gravel
- Pipe installation — Perforated pipe is installed with proper slope (1″ per 10′ minimum)
- Backfill & surface restoration — Gravel cap, fabric wrap, and surface restoration
Is a French Drain a DIY Job?
You can dig the trench yourself; getting it to drain is the harder half. A French drain only works if the perforated pipe falls at least 1 inch every 10 feet toward a discharge point that can take the water — a storm drain, a dry well, or a lower part of the lot. In clay soil, a trench cut without that fall holds water instead of moving it, and the lawn above it stays soggy.
The second problem is what is already underground. A drain line on a Treasure Valley property often has to cross the irrigation mainline, lateral lines and valve wire, and sometimes a buried utility. We call 811 for locates before we dig, and because sprinkler system repair is our main trade we can cut across an irrigation line and leave it working. If you take it on yourself, call 811 first and settle the discharge point before the first shovel goes in.
Idaho-Specific Drainage Considerations
The Treasure Valley’s clay-dominant soils create unique drainage challenges. Our technicians understand local frost line depths, soil composition variations across Ada and Canyon counties, and proper discharge requirements. All drainage work is installed to Idaho code and we pull required permits for qualifying projects.
Get a Free On-Site Drainage Assessment
Show us where the water stands and we will walk the property, work out where it is coming from, and quote the drain before anyone digs. Get my free drainage assessment.
