Drainage & French Drain Installation in Asheville, NC
French drains, culverts, swales, and erosion control engineered for mountain slopes and freeze-thaw. 15 years experience on Western North Carolina terrain.
NC GC License #100844 · NC Landscape Contractor #1400 · NC Stormwater BMP Certified · Permits Handled In-House
Mountain Drainage Starts With the Grade
On a slope, the question isn't just where water collects, it's the path it takes getting there. Water sheets downhill, picks up speed, and finds your foundation, your driveway, or the base of a wall. We map how water moves across the whole grade, then intercept it before it does damage. Get the grade and the interception right and the system lasts. Miss it and no drain keeps up.
French Drain Installation in Asheville
French drains are the most-requested drainage fix we install on WNC slopes, and for good reason. On a grade, a properly built french drain catches water moving through the soil before it reaches your foundation, your driveway, or the base of a wall. We dig to the right depth, set perforated pipe in clean gravel wrapped in filter fabric, and pitch it to daylight or a dry well so it keeps draining for years instead of silting up. Every french drain we install is sized to the slope feeding it, not dropped into a one-size template.
Drainage and Erosion Control Services
We go beyond just french drains. We analyze the full slope, find where water enters and exits, and build to catch it high and carry it safely down.
Culvert installation for driveway crossings, roadside runoff, and carrying water across a grade without washing it out.
Interceptor and surface drains to catch hillside runoff
Catch basins at low and collection points
Footing and downspout drainage tied away from the foundation
Swales and dry creek beds that carry water down the slope
Rain gardens that hold and absorb runoff, designed by an NC Rain Garden Professional (Cert #372)
Erosion control with coir logs, bio-logs, and replanting
Regrading to redirect sheet flow
When a slope needs holding as well as draining, drainage gets built into the wall system from the start. (Link to the Asheville retaining walls and boulder walls pages.)
Thorpe Landscape’s Drainage Process
Free on-site consultation. We walk the slope, look at grade, soil, and where water enters and exits, and scope the build.
Design and proposal. You'll see the plan, the interception points, and a clear written proposal before committing.
Permits and materials. Permits pulled in-house, materials locked in.
Build. Most drainage projects take 1 to 3 weeks from start to walk through.
Where We Work
Thorpe Landscapes installs french drains, culverts, and drainage across Asheville, Black Mountain, Weaverville, Hendersonville, Fletcher, Arden, and the surrounding Western NC towns within about 30 miles of Asheville.
FAQ
What does a french drain cost in Asheville?
It depends on the length, how deep we dig, the slope above it, and where the water can discharge. A short run protecting one downspout is a different job than a full hillside interception system. We give a firm price after walking the site, free, so you know the number before any work starts.
What's the difference between a french drain and a swale?
A french drain is a buried perforated pipe in gravel that pulls subsurface water out of the soil. A swale is a shaped channel on the surface that carries runoff downhill. On a mountain lot we often use both: the swale moves what's on top, the french drain handles what's soaking in.
Water runs down the hill straight at my house. What can you do?
That's the most common mountain drainage problem we solve. We intercept the water uphill of the house with a french or interceptor drain, then carry it around and past the foundation in a swale or piped line that discharges safely downslope. The fix is about catching it before it reaches you, not bailing it out after.
Does freeze-thaw affect drainage up here?
It does. Water that sits in soil expands when it freezes and heaves the ground, which is why poorly drained slopes shift and erode over the winter. Proper subsurface drainage pulls that water out before it can freeze and move things.
Do you pull permits?
Yes, all permits handled in-house.
“Garrett Lee and his whole crew did a terrific job on our hardscape and grading project. They were remarkably responsive to our requests, listened well when we had questions. The lot needed a significant amount of grading which they did to our specifications. They laid two different gravel and stone paths, repaired masonry, created parking areas, and also bushhogged a large, uneven area with efficiency and skill. Overall, I would highly recommend them without reservation.”
– Mimi Mattis, Black Mountain
Let's Solve Your Water Problem
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