Basement Floor & Wall Crack Repair in Arlington, Silver Spring, Gaithersburg & Nearby

We can repair flooding, leaking cracks in your basement or crawl space

When water starts to leak through your basement walls or floors, it can quickly lead to a very serious flood in your home. NV Waterproofing & Foundation Repair understands how all different types of basement leaks are caused, which is why we provide a variety of repair products and techniques to handle every source of basement wall and floor leaks.

To get a free estimate on basement leaking solutions and crack repair services, call us at 1-571-200-1986 or click below! We offer basement wall crack repair, basement floor crack repair, and basement waterproofing in Arlington, Washington D.C., Alexandria, Silver Spring, and throughout Virginia, the District of Columbia, and Maryland

Floods from the floor. Basement floor cracks expose basements to water underneath the slab.

Signs Of A Basement Crack

  • Vertical, horizontal, or stair-step wall cracks
  • Cracked concrete slab/basement floor
  • Musty smells
  • Dampness
  • Water leaks or seepage
  • Efflorescence (white, chalky stains)
  • High level of radon detected

Our basement leaking solutions

  • Basement Floor Cracks

    Water can also rise directly through the porous concrete of your floor slab, a problem that’s exacerbated when there’s a crack. When you have water coming through the floor, the first step is installing a perimeter drain system. We can also install a direct drainage channel, which will help direct any water that comes through the crack into the drain and your sump pump. Finally, we will backfill the crack with stone and cover it with fresh concrete to prevent future leaks.

  • Basement Wall Cracks

    The soil around your foundation is filled with water, and even the smallest crack will allow this groundwater to seep into your basement. Much like with floor cracks, the first step to repairing a leaky wall crack is installing one of our drainage systems. We then use an innovative polyurethane sealant called FlexiSpan® to seal the crack. This flexible sealant will never dry or crack and can flex to the natural movement of your foundation wall, ensuring a completely waterproofed seal.

  • Basement Leaky Windows

    Window frames break down over time, creating separation and allowing water to seep past seals. Once again, the first step for repair window leaks is a drainage system that funnels the water to your sump pump. We will then create a small hole in the wall under the basement window with a plastic fitting that directs any water into the drainage system. This is then sealed with a polymer injection for a clean, waterproof finish.

Repair your leaking basement floor and wall cracks today!

Water can enter your home at any point where there is an opening in the foundation. This includes not only cracks in the basement walls and floors, but around pipes as well. Our floor crack and leaky window solutions provide lasting results that are compatible with your perimeter drainage system and will not crumble, flake off your walls, or fail due to the natural expansion and shrinking of the concrete.

Call the basement waterproofing experts at NV Waterproofing & Foundation Repair today to get started on your crack repair with a free estimate. We offer all of our basement waterproofing services in Arlington, Washington D.C., Alexandria, Silver Spring, Gaithersburg, Germantown, Ashburn, Bethesda, Sterling, Fairfax and throughout the surrounding areas.

What To Expect

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.

Schedule your free inspection—

It'll only take
a minute

Meet with a trusted expert, and get
clear answers about your home.

"*" indicates required fields

1Your Info
2Schedule Your Inspection
3Review & Submit

Customer Information

Don't just take our word for it

See what our customers have to say about our work.

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

Our service area

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

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.

Schedule your free inspection today

Don’t let unanswered questions about your
home worry you any longer.