Concrete Repair Services: Engineered Solutions for Your Home
From sunken driveways and uneven sidewalks to cracked patios and garage floors, NV Waterproofing and Foundation Repair provides permanent concrete repair services backed by engineered repair solutions and an industry-leading transferable warranty.
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Common Concrete Problems We Solve
Uneven, settled or cracked concrete can create trip hazards, collect standing water and make your home look neglected. Fortunately, most concrete problems can be repaired without replacing the slab. Look through the common signs below to pinpoint what may be happening around your property.
Unlevel Concrete
Settled, tilted or uneven concrete creates tripping hazards and can make driveways, sidewalks, patios and walkways hard to use safely. These problems typically develop when the soil beneath the slab settles, shifts or washes away, leaving the concrete without proper support.
Concrete Cracks and Gaps
Cracked concrete is one of the most common signs of slab movement. Cracks in driveways, sidewalks, patios and garage floors let water seep beneath the slab. Once expansion joints deteriorate, water can wash away supporting soil and contribute to additional settlement.
Sinking Driveway
A driveway that dips, pulls away near the garage or develops uneven sections often points to soil settlement beneath the slab. Addressing sinking concrete early can help prevent additional cracking, uneven surfaces and more costly repairs.
Sinking Sidewalks
Settled sidewalk slabs create uneven walking surfaces, collect standing water and raise the risk of trips and falls. In many cases, concrete leveling can lift the slab back into place instead of replacing it.
Surface Pitting & Spalling
If your concrete surface looks rough, chipped or flaky, weather exposure, de-icing salts and repeated freeze-thaw cycles may be breaking down the surface. A professional concrete surface sealer can help protect the slab from further moisture damage and extend its lifespan.
Street Creep
Concrete streets naturally expand during hot weather, gradually pushing against your driveway and garage floor. Over the years, this pressure can crack concrete, damage garage floors and even contribute to foundation movement if left unaddressed.
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Causes
What Makes Concrete Fail?
Concrete is one of the strongest building materials on earth, but it's only as stable as the soil beneath it. When the supporting soil settles, washes away or expands and contracts with seasonal moisture changes, concrete slabs can crack, sink and become uneven. Identifying the underlying cause helps ensure the right concrete repair solution is recommended.
Soil Washout and Empty Voids
Heavy rains, poor drainage, downspout leaks and plumbing leaks can carry soil away from beneath concrete slabs. As empty spaces, or voids, form below the surface, the slab loses support and begins to settle or crack under its own weight.
Clay-Rich Expansive Soil
Soils with high clay content expand when wet and shrink during dry weather. Over time, that repeated movement places stress on concrete slabs, leading to cracks, uneven surfaces and gradual settlement.
Repeated Freeze-Thaw Cycles
Water that enters small cracks freezes and expands during cold weather, gradually widening the cracks and breaking down the concrete surface. Along with de-icing salts and repeated freeze-thaw cycles, this can result in pitting, flaking and premature deterioration.
Inadequate Soil Compaction
If the fill soil wasn’t properly compacted when the home was built, it can gradually settle over time. As that soil compresses, portions of the concrete lose support, letting slabs sink, crack or shift.
Concrete Repair Done Right
See why XX,XXX homeowners have trusted NV Waterproofing and Foundation Repair as their concrete repair contractor. Schedule your free, no obligation concrete inspection today.
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How NV Waterproofing and Foundation Repair Fixes Concrete
Concrete Leveling
Sunken concrete doesn’t always have to be replaced. Concrete leveling with PolyLevel® polyurethane foam fills voids beneath the slab and carefully lifts the concrete closer to its original position. Since the foam cures in minutes, most driveways, sidewalks, patios and garage floors are ready to use the same day.
Concrete Joint Sealing
Open cracks and expansion joints let water reach the soil beneath your concrete, leading to erosion and future settlement. NexusPro® seals joints and cracks permanently with a flexible sealant that helps keep water and debris out while protecting the soil beneath the slab.
Concrete Sealing
Moisture, UV rays, de-icing salts and changing weather gradually wear down concrete surfaces. SealantPro® is a professional concrete surface sealer that penetrates beneath the surface to help protect against moisture, stains and freeze-thaw damage while extending the life of your concrete.
Concrete Coating
Restore worn concrete with decorative coatings designed for garages, patios, front steps and other outdoor living spaces. Durable concrete coatings resist peeling, chipping, stains and everyday wear while giving your concrete a clean, updated appearance.
How It Works
Your Concrete Inspection
Step 1
Evaluate Your Concrete Surfaces
We inspect the condition of your concrete surfaces, checking for uneven slabs, cracks, gaps, settling, surface damage and other signs of movement. We’ll also point out any safety hazards or areas where damage may continue to worsen.
Step 2
Identify the Root Cause
From there, we determine what’s causing the problem. We look at soil conditions, drainage, expansion joints, water intrusion and other factors that may have contributed to settlement, cracking or surface deterioration.
Step 3
Match You With the Right Repair
Because every concrete problem is different, we tailor our recommendations to your property. Whether your concrete needs leveling, joint sealing, surface protection, decorative coatings or a mix of solutions, we’ll explain your options and why we recommend them.
Step 4
Complete the Repair
Our experienced installation crew completes the repairs using engineered concrete repair solutions designed for long-term performance. Most projects are finished in just a few hours, and many repaired concrete surfaces are ready to walk or drive on the same day.
Step 5
Protect Your Concrete Investment
Before we leave, we’ll review the completed repairs, answer any questions and explain how to help protect your concrete for years to come. Your repair is backed by an industry-leading transferable warranty, so you have added peace of mind.
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Why Homeowners Trust NV Waterproofing and Foundation Repair for Concrete Repair
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What To Expect
Ready to get started?
Schedule a free estimate to start your repair journey with Thrasher.
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Fill out our form or give us a call to book your inspection. Share what you’ve noticed so we can send the right expert to your home.
Full home
inspection
An expert will inspect the problem area and surrounding conditions, including soil movement, drainage, structural integrity, and any related concerns.
Clear explanation
of findings
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.
Review recommendations
If repairs are needed, we’ll outline your options, pricing, and timeline so you can make the best decision for your home.
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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
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Frequently Asked Questions
Concrete leveling (or concrete lifting) is a repair method that brings sunken or uneven concrete back toward its original position without replacing the slab. PolyLevel® polyurethane foam is injected beneath the concrete to fill empty spaces, stabilize the soil and carefully raise the slab. Concrete leveling is often used to repair driveways, sidewalks, patios, garage floors and other residential concrete surfaces.
Most residential concrete repair projects take just a few hours to one day, depending on the scope of the work. In many cases, repaired concrete can be walked on within 15 to 30 minutes and driven on the same day, letting you get back to normal much sooner than with concrete replacement.
Yes. PolyLevel® polyurethane foam is lightweight, waterproof and designed to deliver long-lasting support beneath concrete slabs. Combined with NexusPro® joint sealing to help prevent future soil washout, concrete leveling delivers long-term performance and is backed by an industry-leading transferable warranty.
The price of concrete repair services depends on several factors, including slab size, the amount of settlement, accessibility and whether additional services like crack sealing or concrete sealing are needed. Because every project is different, the best way to get accurate pricing is with a free inspection and written estimate from a NV Waterproofing and Foundation Repair Design Specialist.
Yes. In most cases, uneven or sunken concrete can be lifted instead of replaced using PolyLevel® polyurethane foam. This concrete leveling method fills empty spaces beneath the slab and carefully raises it closer to its original position. Next to concrete replacement, it’s faster, less disruptive and often more cost-effective. We typically only recommend replacement when the concrete is severely damaged beyond repair.
Yes, NV Waterproofing and Foundation Repair works with homeowners throughout VA and the surrounding communities.
Related pages
Service Areas
NV Waterproofing has locations throughout Northern Virginia, D.C., and Suburban Maryland.
Resources
Access valuable resources to help keep your home healthy and your family safe.
Our Promise
At NV Waterproofing, we pride ourselves on providing permanent solutions, and stand behind our work with industry-leading, fully transferable warranties and guarantnees.
