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Sinking Driveway2026-11-02T15:50:20-06:00

Sinking Driveway Repair & Driveway Leveling in Washington, D.C., VA

A sinking or uneven driveway can lead to trip hazards, cracks, rough vehicle transitions and drainage problems that worsen over time. Often the concrete itself is still in good condition, while the supporting soil beneath it has settled, shifted or eroded. NV Waterproofing and Foundation Repair provides expert inspections and customized concrete lifting and driveway leveling solutions designed to restore sunken concrete without full replacement.

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Symptoms

Warning Signs of a Sinking Driveway

A sinking driveway can start with a slight height difference between slabs, though settlement continues as the soil beneath the concrete loses support. Look for these common signs, especially near the garage, sidewalk or street. A professional inspection determines why the concrete is moving and whether concrete lifting and driveway leveling can restore the surface and stop additional damage.

Uneven or pitched driveway slabs
Raised slab edges and trip hazards
Sections sitting lower than nearby concrete
Water collecting or draining back toward the home
New or widening cracks between slabs
Driveway settlement at the garage entrance
Snow removal equipment catching on uneven edges
Rough transitions for vehicles entering the garage

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Causes

What Makes a Driveway Sink

A driveway slab is only as stable as the well-compacted soil beneath it. When that support settles, erodes or shifts, voids can develop under the concrete, allowing sections of the driveway to sink. While several factors may contribute to settlement, the concrete itself is rarely the problem; it’s the supporting soil. Determining why the support was lost is an important first step in recommending the right concrete driveway repair.

  • Loose or Poorly Compacted Fill

    Driveways are commonly poured over fill soil added during construction. If that soil wasn’t compacted evenly, it can compress over time and leave unsupported areas beneath the slab.

    As vehicles and seasonal moisture changes place pressure on the driveway, loose fill soil can continue settling. The concrete may gradually sink into the spaces that form, creating uneven slabs or a noticeable dip where the driveway meets the garage.

  • Soil Washout and Erosion

    Water moving under or alongside a driveway can wash away the soil that supports the concrete. Leaking downspouts, poor grading and runoff are common contributors.

    As supporting soil washes away, voids form beneath the slab. The concrete can then crack, tilt or sink into those empty spaces. Correcting drainage concerns may be an important part of helping the repair perform over time.

  • Seasonal Freeze-Thaw Cycles

    Moisture in the soil expands when it freezes and shrinks as it thaws. Repeated freeze-thaw cycles can move the soil beneath a driveway and reduce consistent support.

    Seasonal movement can push sections of concrete upward and let them drop unevenly when temperatures rise. Over many cycles, that movement can lead to cracks, gaps and a settled or uneven concrete driveway.

  • Expansive Soils

    Soils high in clay can swell when wet and shrink as they dry out. This ongoing movement produces shifting pressure beneath the driveway.

    If soil volume shifts unevenly beneath the slab, one section can rise while another loses support and sinks. Regional soil and climate conditions often shape both the cause of settlement and the recommended driveway repair solution.

  • Natural Soil Settlement

    Even properly placed soil can consolidate gradually under the weight of the driveway and regular vehicle traffic.

    When deeper soil layers compress, the driveway may gradually settle over time. The settling tends to be most noticeable where slabs meet, near the garage floor or along the outer edge of the driveway.

  • Excessive Vehicle Weight

    Frequent traffic from trucks, recreational vehicles or heavy equipment can put added stress on concrete that already has weak or uneven support**.

    Heavy loads alone don’t usually cause driveway slab sinking, though they can hasten movement when voids, loose fill or washed-out soil are already present beneath the concrete.

Why a Sinking Driveway Shouldn't Wait

  • Stage 1

    Small Differences in Height

    The driveway may start with a slight dip or uneven transition between slabs. At this stage, homeowners usually spot water pooling, rough vehicle transitions or a minor trip hazard.

  • Stage 2

    Progressive Settlement

    As the supporting soil continues to settle or wash away, the height difference increases. Cracks may grow, water intrusion can increase, and the driveway becomes more difficult to shovel, drive over or walk on safely.

  • Stage 3

    Damage Becomes More Extensive

    If left alone, settlement can progress until sections of concrete crack, break apart or are too damaged to lift effectively. At that point, replacement may be necessary, resulting in a more expensive and disruptive repair.

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NV Waterproofing and Foundation Repair's Solution for Sinking Driveways

A sinking driveway is repaired by restoring the support beneath the concrete—not replacing the slab itself. NV Waterproofing and Foundation Repair uses a complete concrete repair system that lifts and stabilizes settled slabs while helping protect them from future damage. Using PolyLevel® concrete lifting and leveling followed by NexusPro® joint sealant, we restore a safer, more level driveway and help reduce water intrusion that can contribute to future settlement.

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  • PolyLevel® Concrete Lifting

    PolyLevel® expanding polyurethane foam fills the voids beneath the slab, stabilizes the soil below and precisely lifts settled concrete toward its original position. It’s a minimally invasive repair that cures quickly and is often ready for normal use the same day.

  • NexusPro® Joint Sealant

    Once the driveway has been lifted and leveled, NexusPro® Joint Sealant can seal cracks and control joints to help keep water from reaching the supporting soils below. By cutting down on water intrusion, NexusPro® helps protect the repair and extend the driveway’s life.

How It Works

NV Waterproofing and Foundation Repair's Installation Steps

Step 1

Schedule Your Free Inspection

Every concrete driveway repair starts with a comprehensive inspection. A specialist assesses the condition of the slabs, identifies the cause of settlement and determines whether concrete lifting is the right solution. Homeowners are given a clear explanation of the findings and a tailored repair plan.

Step 2

Prepare the Driveway

The repair area is carefully prepared before small, penny-sized holes are strategically drilled into the affected slabs. These access points allow precise placement of the lifting material while minimizing the visual impact on the driveway.

Step 3

Raise and Stabilize the Concrete

PolyLevel® expanding polyurethane foam is pumped beneath the driveway. The foam flows into empty spaces under the slab, expands to fill voids, stabilizes the supporting soil and gently raises the concrete back toward a more level position with precision.

Step 4

Seal and Finish the Repair

Once the driveway has been lifted and stabilized, the injection holes are filled to blend with the existing concrete. Cracks and joints are then sealed with NexusPro® Joint Sealant to help limit water infiltration and protect the supporting soils beneath the driveway from future washout.

Step 5

Add Long-Term Protection

To help extend the life of the repair, SealantPro® is applied to protect the concrete surface from moisture, chemicals and everyday wear. Working together, PolyLevel®, NexusPro® and SealantPro® lift, seal and help protect the driveway for long-lasting performance.

Benefits

Why Local Homeowners Trust NV Waterproofing and Foundation Repair

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What To Expect

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We’ll walk you through what we’re seeing in easy-to-understand language so you know the root cause of the issue, not just the symptoms.

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Customer Information

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Don't just take our word for it

See what our customers have to say about our work.

NV Waterproofing was extremely responsive and 100% committed to identifying our water problem and designing a solution. Their work was excellent. The crew was on time and organized. They were very careful to protect the exterior landscaping and the interior of our home from dirt and debris. Even two years later, they responded to a sump problem at no additional charge. NV Waterproofing does the job right and stands behind its work.

Mike and Lynn F. | Columbia, MD

We bought a house in a state of disrepair, and so we've had to work with a number of contractors. I'd rank this company at the top of the list for their professionalism, knowledge, experience, and honesty. We had bowing of our basement walls that needed to be addressed. Michael came out to assess the situation, and gave us some options. After speaking with him, I felt very confident in their ability to buttress our walls. It was also a huge bonus that we were able to set up a payment plan for this job too. When the team showed up, Casey, Kevin, and Grant, they were super polite and professional. They took great care of our property, and if they had a question about anything, they asked. Also, if I had a question, Casey (the foreman), was very knowledgeable and quick to answer. They presented the work as they progressed through the job, and really, I was actually a little blown away by the scale of the project, and the speed at which they worked. What an impressive job they did! We're very confident in the work they did and will hire them again.

Ellen M.  | Takoma Park, MD

We were referred to NV Waterproofing from my brother-in-law who used them and was pleased. They came out and gave us an estimate - they were very prompt. We had the work done - it looked great and I am sure will do the job (only time will tell). We did have a miscommunication with the work (mostly on our part), but the owner had it fixed promptly and without additional cost. I would highly recommend them to anyone with water issues in their basement.

Susan C. | Washington DC, DC

NV stuck with me and made sure I was happy. Roberto Jr kept me calm as my problem persisted and kept working on a solution beyond the obvious. I highly recommend. Looking forward to a dry basement this summer.

Dean R. | Washington, DC

I am writing this letter to commend members of your organization for the waterproofing work performed on and around the foundation of my house. Despite situations beyond the control of both me and your associate, he always maintained professionalism and demonstrated why he is an outstanding representative of your organization. The crew obviously knew what had to be done and went about doing it. They were prompt in arriving at work each day, diligent in the performance of their duties (in spite of high heat and humidity), and took measures to ensure the safety around the excavated area (important because of children in the neighborhood). Unlike other construction sites I have seen, the crew maintained the area free of litter— no small measure these days! In addition, the crew always provided clear explanations of the work to be done each day, answering the questions with forthright and clear responses, never hurrying the discussion. As I was not on site while work was being done, they called me several times, taking those extra steps to keep me informed of the status of the work and aware of the tasks yet to be performed— something that is greatly appreciated. I would appreciate it if you would offer my heartfelt thanks to your able crew for the quality waterproofing work performed and the excellent communication and coordination exhibited by them.

Myra L. | Washington, DC

In my 12 years of having NV Waterproofing as a business partner, they have always proved reliable and trustworthy. They are a great value for me and my customers.

Darryl O. of Brookfield Homes, | Washington, DC

Great professional service and able to respond in timely manner to the project need.

Blake B. | Washington, DC

Brendan was very knowledgeable, professional and courteous. Highly recommend.

Cesar T. | Arlington, VA

A brief note to thank NV Waterproofing for extreme professionalism and courtesy in the manner in which my recent basement water seepage problem was addressed. From the initial contact with Jim, through the work with Roberto, Carlos and Jose, it was an overall pleasant experience – not to mention my contact with the owner and his responsiveness.

Ramesh T. | Arlington, VA

These guys were amazing. The initial visit was smooth, not pushy at all and he was even able to accommodate the relocation of a small drainage pipe. The demo to install the system was done beautifully, yes it was really good, you can tell they were precise and careful when doing so. Everything was clean, no stains on my carpet and they protected everything. No leak so far and I love it. Did I mention the price was excellent? I had 3 other companies to estimate thousands and even tried to sell extra unnecessary equipment. Thank you NV Waterproofing I have and will continue to recommend you.

Chelly Z. | Falls Church, VA

We appreciated NV Waterproofing's honesty and the men who worked tirelessly in uncomfortably cold weather. We've had one big storm since they finished and the basement walls are nice and dry. Nice work!

Peter V. | Falls Church, VA

Mauricio and Cristian were the initial sales reps who came to examine the issue and they took the time to test drainage that might have potentially been creating the water issue. They offered a reasonable solution (sealing the visible cracks and holes in the concrete) and I was contacted within a couple of days with an estimate and scheduling options. Sean was our tech and he did a fantastic job diagnosing the issue beyond just the cracks. He not only address all the holes and cracks in the concrete and mortar, he sealed up additional entry points above the foundation. He sourced additional materials to cover openings for cable lines. He went above and beyond and gave us measured information on how we should continue to monitor and treat this area as the house settles. He was thorough, informative, and provided excellent service in his work. I'm very glad that Sean was the technician sent to us and I would specifically request him for your projects.

Sara T. | Falls Church, VA

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Before & after photos

Check out before and after photos from some of our completed projects.

  • Sunken Concrete Step Repair in Stephens City, VA

    This Stephens City, VA homeowner was dealing with a sunken concrete front step that had settled over time, creating an uneven entryway and a noticeable tripping hazard near the front door. Sunken concrete steps can make everyday foot traffic unsafe for homeowners, guests, and delivery drivers, while also taking away from the home’s curb appeal. Our concrete repair team lifted and leveled the front step back to its proper position, creating a safer, more stable walkway and entrance. This concrete step repair helped reduce the risk of falls, improved the look of the front entry, and gave the home a cleaner, more welcoming appearance. The homeowner was thrilled with the outcome — a big transformation that improved both safety and curb appeal!

  • Basement Waterproofing in Winchestor, VA

    A homeowner in Winchester, VA, was struggling with a failing sump pump that couldn’t keep up during heavy rainstorms, leaving their basement vulnerable to water intrusion. The lack of a reliable backup system also left them worried about potential flooding during power outages. Frustrated and seeking a dependable solution, they contacted NV Waterproofing and Foundation Repair, a trusted basement waterproofing company in Winchester, VA.

    After assessing the situation, we replaced their old sump pump with a state-of-the-art TripleSafe Sump Pump system. This advanced system includes three levels of protection: a primary pump, a secondary pump for heavy water flow, and a battery backup to ensure the basement stays dry even during power outages. The homeowner now has peace of mind knowing their basement is fully protected, no matter the weather.

  • Pool Deck Leveling in Manassas, VA

    A homeowner in Manassas, VA, quickly realized their dream backyard pool was at risk when the surrounding concrete pool deck began to show serious problems. Uneven and sunken slabs created tripping hazards and unsightly cracks, making both safety and aesthetics a challenge for anyone using the space. Additionally, water from rain and pool use was pooling in low spots, causing slippery surfaces and further soil erosion beneath the deck. These issues not only threatened the safety of family and guests but also compromised the value and enjoyment of the home.

    Seeking an effective solution, the homeowner reached out to our team for a professional assessment. We identified the main cause of settlement: soil erosion under the slabs—a common issue in Manassas due to its clay-rich ground and fluctuating moisture. To address both the immediate hazards and prevent future damage, we recommended our two-part approach: the cutting-edge PolyLevel® concrete leveling system and NexusPro® Joint Sealant.

    The repair process began with drilling small holes into the affected concrete slabs, allowing us to inject high-strength PolyLevel® polyurethane foam beneath the surface. As the foam expanded, it filled voids, stabilized the soil, and gently lifted the slabs back to their original positions. The process was quick, clean, and minimized disruption, giving the pool deck a level, safe surface once again. PolyLevel® foam is waterproof and lightweight, reducing the risk of future settling and ensuring long-term durability, even in a wet poolside environment.

    To provide further protection, we sealed all cracks and joints with NexusPro® Joint Sealant. This flexible, weather-resistant sealant prevents water from seeping beneath the slabs, protecting the soil and concrete from additional erosion. The result was a clean, finished appearance that not only improved the look of the deck but also safeguarded it for years to come.

    Thanks to modern concrete leveling technology, the homeowner’s pool deck was transformed from a liability into a safe and attractive outdoor gathering space. The project was completed in a single day, with minimal mess and immediate results, giving the homeowner peace of mind and renewed pride in their backyard. If you’re facing similar issues with your pool deck in Manassas, VA, the PolyLevel® system and NexusPro® Joint Sealant offer a fast, effective, and lasting

View all before & afters

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Proudly Serving Northern Virginia, D.C., and Suburban Maryland

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Frequently Asked Questions

Is concrete lifting more affordable than replacement? 2026-10-02T12:20:23-05:00

Concrete lifting is often less expensive than full driveway replacement when the existing slabs are still in repairable condition. It usually requires less labor, fewer materials and less time while avoiding demolition and removal of the old concrete. The most cost-effective option depends on the condition of the driveway, so an inspection is needed for an accurate recommendation. 

How much time does driveway leveling take? 2026-10-02T12:19:32-05:00

Many driveway lifting and concrete leveling jobs take only a few hours, depending on how many slabs are being repaired and how large they are. Because PolyLevel® cures fast, the driveway is often ready for normal vehicle traffic the same day. Your concrete repair specialist will explain the expected timeline before work begins. 

How long will driveway lifting last? 2026-10-02T12:19:08-05:00

Once the underlying cause of settlement is properly addressed, PolyLevel® delivers a long-lasting repair built to support the concrete for years to come. The long-term performance of any driveway repair also depends on factors such as drainage, soil conditions and the condition of the concrete itself. A professional inspection paired with a customized concrete leveling plan helps ensure the best long-term results. 

Is a sinking driveway a safety risk? 2026-10-02T12:18:41-05:00

A settled or uneven driveway can create raised edges and abrupt transitions that pose trip hazards and may damage vehicles or snow-removal equipment. Low spots may also pool water or direct runoff toward the garage and foundation. Because settlement tends to continue, having the driveway evaluated before the height differences and cracking worsen is the smart move. 

Can a sinking driveway be repaired without replacing it? 2026-10-02T12:18:13-05:00

Yes, often. If the slab is still structurally sound, driveway lifting can often restore it without full replacement. PolyLevel® is injected through small holes in the concrete to fill voids, stabilize the soil beneath and raise the slab toward a more level position. An inspection reveals whether lifting or replacement is the better repair option. 

Why does a driveway sink? 2026-10-02T12:17:42-05:00

A driveway usually sinks when the soil beneath the concrete can no longer provide even support. Loose fill, soil erosion, drainage problems, natural settlement, expansive soils and freeze-thaw cycles can all create voids or unstable conditions beneath the slab. Heavy vehicles may speed up that movement when the supporting soil is already weak or unstable. 

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NV Waterproofing has locations throughout Northern Virginia, D.C., and Suburban Maryland.

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