Stop Water Before It Reaches Your Foundation

Keller's exterior drainage solutions protect your property from the outside in — before water ever becomes a basement problem.

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Water damage doesn’t always start in your basement. It starts in your yard — in a poorly graded lawn, an overwhelmed gutter, a pooling driveway, or a downspout draining directly against your foundation wall. Keller Waterproofing specializes in identifying and correcting the exterior conditions that put your home at risk, with permanent, low-maintenance solutions designed for New England properties and the demands of real weather.

Yard Grading & Grade Correction Services That Fix Drainage Problems for Good

When poor yard grading is sending water toward your home, Keller's grade correction and swale construction services redirect it — permanently.

If your builder didn’t grade your yard correctly, you’ve been paying for that mistake ever since — in soggy lawns, flooded basements, and eroding landscaping. Keller’s grade correction process addresses the root cause directly. Depending on your property, that may mean removing and replacing existing grass, excavating and repositioning soil, locating and protecting utility lines, and laying fresh sod to finish the job cleanly. In some cases we’ll construct a swale — a gently shaped valley in the earth that naturally channels stormwater away from your home to a safe discharge point. Other situations call for retaining walls, steps, or walkways to manage slope and redirect water flow for good. Every grade correction is tailored to your specific property — because no two drainage problems are exactly alike.

Channel water away from your home and yard without any mechanical equipment
Reduce ground saturation in yards and gardens
Permanent, maintenance-free drainage correction once grading is complete
Protects your foundation from the hydrostatic pressure that builds when water pools against it
Eliminates problem water around your property without pumps or ongoing maintenance
Functions without mechanical parts that are prone to failure
May be combined with swales, retaining walls, or walkways for comprehensive correction

Drywell Installation That Collects Stormwater Runoff and Keeps It Underground

Drywells collect and disperse above-ground water completely out of sight — so your yard stays functional and your drainage stays working

When water collects faster than the ground can absorb it — from roof drains, low-lying areas, or hard surfaces — a drywell is one of the most effective and least intrusive solutions available. Installed entirely below ground, drywells collect excess surface water and allow it to disperse slowly and safely into the surrounding soil, eliminating pooling without disrupting how you use your property. No equipment to maintain, no eyesore to work around — just reliable drainage that disappears beneath the surface and gets out of the way. Keller has the expertise to assess your specific drainage conditions, size the system correctly, and install it properly the first time.

Collects above-ground water from roof drains and low-lying yard areas
Installed entirely below ground — no visible equipment, no loss of usable yard space
Long-term solution that addresses the root cause rather than managing symptoms
Aesthetically clean — system is completely hidden once installed
Complies with local stormwater regulations when required
Reduces flooding risk around your home and on your property
Prevents erosion caused by unmanaged stormwater runoff
Increases usable space on valuable real estate by eliminating standing water areas

Water Pooling at Your Garage Door Isn't a Minor Inconvenience — It's a Warning Sign

If water is collecting on your driveway or in front of your garage, Keller has the right solution for your situation.

A driveway that pools water isn’t just a nuisance — it’s a direct pathway for moisture to work its way under your garage door, into your garage slab, and eventually toward your foundation. Whether the problem is poor original grading, inadequate drainage channels, or a low point that collects runoff from multiple directions, Keller will diagnose the cause and correct it with a solution built for your specific layout. Don’t let a pooling driveway become a wet basement.

Eliminates standing water in front of garage doors and along driveways
Prevents water from migrating under garage doors and into interior spaces
Reduces freeze-thaw damage to driveway surfaces caused by standing water
Protects your foundation from the moisture that pools against it at grade level
Custom-fit solutions based on your driveway configuration and drainage conditions
Addresses the source of the problem — not just the symptom

Downspout Drainage Corrections That Relieve Hydrostatic Pressure Against Your Foundation

Improperly discharged gutters and downspouts are one of the leading causes of wet basements — Keller redirects that water safely away from your foundation walls.

Your roof sheds an enormous volume of water every time it rains, and your gutters are designed to manage all of it. The problem is where that water ends up. When downspouts discharge directly at the base of your foundation walls, they contribute to the hydrostatic pressure that forces moisture through cracks, joints, and porous concrete over time. This is one of the most common — and most overlooked — contributors to wet basements in New England homes. Keller Waterproofing corrects downspout discharge issues with solutions that redirect that volume of water safely away from your foundation, reducing pressure and protecting your home from the outside in.

Redirects downspout discharge away from foundation walls to eliminate hydrostatic pressure buildup
Reduces the single largest source of exterior water intrusion for most homes
Can be connected to underground drainage systems for a completely clean, hidden solution
Protects foundation walls, footings, and below-grade spaces from chronic moisture exposure
Works in combination with grade corrections and drywells for a fully integrated drainage system
Low-maintenance solution once properly installed and directed

Common Questions About Keeping Water Away From Your Home

What exterior drainage services does Keller Waterproofing provide?

Keller offers a full range of exterior drainage solutions designed to stop water problems before they reach your foundation. Our services include yard grading and grade corrections, swale construction, drywell installation, driveway drainage corrections, and gutter and downspout redirections. Whether you have one specific problem or a combination of drainage issues across your property, we assess your situation and recommend the right solution — or combination of solutions — for your home.

How do I know if my yard needs a grade correction?

The most common signs are water pooling near your foundation after rain, soggy or consistently wet areas in your lawn, erosion along slopes or garden beds, and water flowing toward your home rather than away from it. If your home was built on land that wasn’t graded correctly to begin with, these problems will get worse over time — not better. Keller evaluates your property’s existing grade and recommends corrections tailored to your specific conditions, which may include soil excavation, swale construction, retaining walls, or new sod.

What is a drywell and how does it work?

A drywell is an underground structure that collects excess surface water — typically from roof drains, downspouts, or low-lying areas in your yard — and allows it to disperse slowly into the surrounding soil. Because it’s installed completely below ground, it doesn’t interrupt how you use your property and leaves no visible equipment behind. Drywells are one of the most effective long-term solutions for managing stormwater runoff on residential properties, and Keller sizes and installs every system based on your specific drainage volume and soil conditions.

Why does water pool in front of my garage door and what can be done about it?

Water pooling at your garage door is usually caused by a low point in your driveway grade, insufficient drainage channels, or runoff collecting from multiple directions with nowhere to go. Beyond being a daily nuisance, that standing water can work its way under your garage door, damage your slab, and contribute to moisture pressure against your foundation. Keller diagnoses the specific cause at your property and installs a drainage correction — whether that’s a channel drain, a regraded surface, or a connected underground system — to permanently redirect that water away from your home.

Can my gutters and downspouts really cause a wet basement?

Yes — and it happens more often than most homeowners realize. Your roof sheds a significant volume of water with every rain event, and if your downspouts are discharging that water directly at the base of your foundation walls, it builds hydrostatic pressure over time. That pressure is one of the primary forces that drives moisture through cracks, joints, and porous concrete into your basement. Redirecting your downspouts away from the foundation — or connecting them to an underground drainage system — is one of the most impactful and cost-effective steps you can take to protect your basement from water intrusion.

Do exterior drainage improvements add value to my home?

Absolutely. Buyers and home inspectors pay close attention to how a property manages water, and visible drainage problems — standing water, eroded landscaping, water stains near the foundation — are red flags that can affect your appraisal and your sale. Correcting these issues with permanent solutions like proper grading, drywells, and redirected downspouts signals to buyers that the home has been proactively maintained. More importantly, addressing exterior drainage now can prevent far more costly foundation and basement repairs down the road — making it one of the highest-return investments a homeowner can make.

READY FOR A PERMANENT SOLUTION TO YOUR EXTERIOR DRAINAGE PROBLEMS?

From drywell installation and yard grading to driveway drainage and downspout corrections — thousands of New England homeowners have trusted Keller Waterproofing to get it right since 1972!