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Customer Information

Our Services

Basement Waterproofing

We have the most effective solutions for wet basements.

Foundation Repair

We’ll find the right solution for your home foundation problems.

Crawl Space Repair

We offer complete crawl space encapsulation & repair services.

Concrete Leveling

Lift and level sunken, uneven concrete slabs with our PolyLevel system.

Concrete Repair

Fix a cracked driveway, walkway, or pool deck with our long-lasting solutions.

  • Financing Options Available

    We offer affordable financing options so that you can fix the problem now, before it gets worse.

Basement Waterproofing, Crawl Space Repair & Foundation Repair Services For VA, D.C. & MD Homes

Our area of expertise is basement waterproofing. We know the last thing any homeowner wants is water in their basement, so we work hard to ensure your wet basement is a thing of the past with highly effective basement waterproofing solutions. We can help with puddles of water in your basement and offer moisture control systems to prevent mold growth and other costly issues.

For homes with crawl spaces, problems below your home can affect the entire house. Excess moisture, weakened supports, and poor insulation can lead to sagging floors, wood rot, mold growth, musty odors, and high humidity. Addressing these issues early helps protect your home’s structural integrity, improve indoor comfort, and prevent more costly repairs down the road.

Whether you’re dealing with a wet basement, crawl space moisture, or structural damage, we provide comprehensive solutions, including:

We are proud to turn wet, stinky spaces into dry, healthy basements, offering a variety of basement waterproofing products and services to homeowners across Virginia, the District of Columbia, and Maryland, including sump pumps, dehumidifiers, window wells, and so much more.

Customer Reviews Trusted By
Homeowners Like You

At NV Waterproofing & Foundation Repair, we pride ourselves on the honesty and integrity that we bring to every home improvement project we undertake. But don’t just take our word for it! Our reputation is built on over 30 years of exceptional customer service. NV Waterproofing & Foundation Repair has received hundreds of positive reviews on Best Pick Reports and Angie’s List, and we’ve maintained an A+ rating with the Better Business Bureau.

NEED TRUST INDEX

Ready to get started?

Schedule a free estimate to start your repair journey with Thrasher.

Schedule your inspection

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.

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

Foundation Repair Professional Proudly Serving Washington D.C., Alexandria, Arlington & Nearby

When your home’s structural stability is at stake, it’s always better to act sooner rather than later. NV Waterproofing & Foundation Repair is the foundation repair company you can rely on for all of your structural repairs and crack repair solutions in Washington D.C., Alexandria, Gaithersburg, Arlington, Germantown, and nearby. Plus, we even offer solutions for sinking, cracked concrete sidewalks, driveways, pool decks, and interior floors.

NV Waterproofing & Foundation Repair offers these products for durable, long-lasting concrete and foundation repairs:

  • Foundation piers for settling foundations, tilting chimneys, and foundation cracks
  • Wall anchors for bowing foundation walls, stair-step cracking, and diagonal cracking in corners
  • Street creep systems to reinforce foundation walls and prevent future damage
  • Crawl space support posts to level uneven interior floors and provide support for undersized and sagging beams
  • Concrete leveling to stabilize and restore sinking slabs using PolyLevel®.
  • Cracked concrete repair to fix cracks and joints using a powerful concrete sealant, NexusPro®.

With high-quality products and proven techniques, no project is too large or too small. Reach out to us today at 1-703-690-3889 or fill out our online form to schedule a free estimate in Washington D.C., Alexandria, Arlington, Ashburn, Gaithersburg, Sterling, Bethesda, Gainesville, Silver Spring, Fairfax, and nearby!

Why Choose Us as Your Trusted Professional

Since 1986, NV Waterproofing & Foundation Repair’s team of experienced technicians has solved underlying water problems for thousands of homeowners throughout Greater Washington D.C..

Serving homeowners
since 1986

Thousands of
satisfied customers

Angie’s List Super Service
Award winner

Free, no-obligation
estimates

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Our service area

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

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