Foundation & Basement Drainage Solutions in Chester County & the Main Line

A wet basement almost always starts outside, with water that was allowed to collect against the foundation instead of being carried away. JHL Landscape Design solves that from the exterior, the grading, perimeter drainage and downspout work that keep our 46 inches of annual rain off your foundation walls in the first place. Working across Chester County and the Main Line since 2004, we read the grade, the soil and the water around your home and rebuild the system so the foundation stays dry.

Why Water Reaches Your Foundation

Our clay-heavy Wissahickon-schist soils hold water like a sponge and press it against foundation walls, and freeze-thaw winters only widen the cracks it finds. But the root cause is usually above ground: a grade that slopes toward the house, downspouts dumping at the corners, and settled backfill that has formed a basin around the foundation. Fix the water on the surface and most of the pressure on the wall disappears.

Signs Water Is Pooling at the Foundation

• A damp, musty or visibly wet basement, especially after heavy rain
• Efflorescence, the white chalky residue, on basement walls
• Standing water or saturated soil along the foundation after storms
• Downspouts discharging right at the foundation corners
• Ground that has settled into a low spot against the house

Because we are a design-build firm, we diagnose the actual path water is taking around your home rather than treating one symptom. Often the fix is a coordinated combination of grading and drainage, not a single product.

Exterior Fixes That Keep Water Away

The most cost-effective foundation drainage work happens at the surface. We re-establish positive grade so the ground falls away from the house, then capture and carry roof and surface water to a safe outlet well clear of the foundation. These exterior grading and drainage solutions address the source, the water arriving at the wall, instead of just managing it once it is already inside.

How We Move Water Off the Foundation

• Regrading to build positive slope away from the foundation walls
• Downspout extensions and buried discharge lines to a daylight or pop-up outlet
• Perimeter and footing drains to relieve hydrostatic pressure on the wall
• Sump-pump discharge routing so pumped water leaves for good and never recirculates
• Swales and french drains to intercept water before it ever reaches the house

A perimeter or footing drain installed at the base of the foundation collects water in the soil and carries it away under gravity, taking the load off the wall. Managing the sump-pump discharge matters just as much: pumping water out only to let it run back toward the foundation is a loop we see constantly and is straightforward to break.

When to Coordinate With a Waterproofer

Our work is the exterior side of the equation, the grading and drainage that stop water before it loads the wall. For a large share of wet basements in our area, getting that exterior water under control is the durable fix and nothing more is needed. We are upfront about the line, though: if water is still entering after the grade, downspouts and perimeter drainage are corrected, the problem has moved inside the wall.

At that point the right next step is interior waterproofing, sealing, an interior drain or membrane, work handled by a waterproofing specialist. We coordinate cleanly with that scope rather than overlapping it, making sure the exterior is doing its job so the interior system is not fighting a flood it never should have seen. Tackling the outside first usually means the interior work, if any, is smaller and cheaper.

Frequently Asked Questions

Can fixing the grading and downspouts really dry out my basement? For a large share of wet basements in our area, yes. Most water reaching the foundation is surface water from a grade that slopes inward and downspouts dumping at the corners. Re-establishing positive slope, extending downspout discharge and adding perimeter drainage solves it without touching the inside of the wall. If water still enters after that, the problem has moved inside and calls for a waterproofer.

What is a perimeter or footing drain and do I need one? It is a buried, gravel-wrapped drain pipe run along the base of the foundation that collects water in the soil and carries it away under gravity, relieving pressure on the wall. It is the right tool when grading and downspout fixes alone do not fully control water against the foundation. We assess whether your situation needs one or whether surface work is enough.

My sump pump runs constantly, can you help with the discharge? Yes. A common issue is discharge piping that releases pumped water too close to the house, where it soaks back in and the pump cycles again. We route the discharge to a proper outlet well clear of the foundation, often combined with grading and downspout work so the pump has less to handle in the first place.

Do you do interior basement waterproofing too? We focus on the exterior, the grading, perimeter drainage and downspout work that keep water off the foundation, which solves most wet-basement cases at the source. If water still enters after that is corrected, we coordinate with a waterproofing specialist for interior sealing or drainage rather than overlapping their scope. Call us at (610) 422-3474 to walk through your situation.

Related design services: Drainage & Grading · French Drain Installation · Downspout Drainage.

Areas We Serve

• West Chester, PA — Our home studio at 701 S Franklin St, drying out basements from the outside
• Newtown Square & the Main Line — Foundation grading and perimeter drainage for Main Line homes
• Malvern, Exton, Downingtown, Chadds Ford — served towns

Ready to start? Request a consultation or call (610) 422-3474.

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About JHL Landscape Design

JHL Landscape Design is a design-build landscape company serving Chester County, Delaware County and the Main Line from West Chester (701 S Franklin St). We design, install, and care for complete landscapes — landscape design and 3D rendering, hardscape and patios, drainage and grading, and plantings — with every project grounded in a plan you approve before work begins.

PA HIC #PA035784 | ICPI Certified | HBA Member — Chester & Delaware Counties | BBB A+ | 20+ Years Chester County

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JHL Landscape Design | PA HIC #PA035784 | ICPI Certified | Licensed & Insured 701 S Franklin St, West Chester, PA 19382 (610) 422-3474