Basement Waterproofing & Crawl Space Repair Company in Montgomery, Prince Georges, MD & Loudon, Fairfax, VA: NV Waterproofing

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NV Waterproofing has been ensuring healthy basements since 1986. Homeowners in Northern Virginia, Suburban Maryland, and the Greater D.C. area have benefited from their expert basement waterproofing, crawl space encapsulation, and foundation repair for over 30 years.

Locally owned and operated, NV Waterproofing is the authorized Basement Systems contractor for Greater Washington D.C. and Northern Virginia. Customers gain exclusive access to the following:

Award-winning products and service
Over 30 years of Basement Waterproofing, Crawl Space & Foundation Repair service
Licenced, dedicated contractors
Lifetime warranties - ask for details
Free, no-obligation estimates - contact today!

Services:

Basement Waterproofing to help prevent basement flooding.
Crawl Space Encapsulation to help protect against mold, rot, and moisture problems.
Moisture Control for basements and crawl spaces to help prevent mold, rot, and musty odors.
Air Purification to eliminate indoor air contaminants, including allergens, bacteria, odors, and more, using a unique 3-stage filtration process
Foundation Repair for cracks, bowing walls, uneven floors, and more.

Products Installed:

Sump Pumps with Battery Backup Systems
Interior Drainage Systems
Crawl Space Vapor Barrier & Encapsulation System
Energy-Efficient, Self-Draining Dehumidifier
High-Performance Aspen Air Purifier
Waterproof, Mold-Resistant Finished Walls and Flooring
Foundation Piers & Wall Anchors

Service Area:

NV Waterproofing offers its 30 years of basement waterproofing, crawl space repair, and foundation repair servies to the following areas:

Greater Washington D.C.
Suburban Maryland, including Montgomery, Prince Georges, Saint Marys, Charles, and Frederick counties.
Northern Virginia, including Arlington, Fairfax, Loudoun, and Prince William counties.

Below, check out before and after photos of wet basements, damp crawl spaces, and failing foundations they've fixed. Plus, browse through positive reviews and testimonials from thousands of satisfied customers! Call today to schedule your free evaluation and estimate.

Services Offered

Basement Waterproofing Crawl Space Repair Foundation Repair

Reviews
Testimonials
Before & After
Awards
Team

By Paula C. Vienna, VA

"Great Job Casey, Ricky and Jose! Thanks NV!!"

By Patrice T. Alexandria, VA

By Paula C. Silver Spring, MD

By T B. MD

""Success has to do with how well the job gets done and..."

Dry, Clean, and Protected: Basement Waterproofing Success in Arlington, VA

What was once a damp, cluttered space in an Arlington, VA basement has now been completely transformed into a dry, neat, and reliable part of the home. The homeowner had been dealing with persistent moisture issues, so they turned to NV Waterproofing and Foundation Repair for a long-term solution—one that didn’t just mask the symptoms but addressed the root of the problem. We installed our WaterGuard® interior drainage system along the perimeter to effectively capture and redirect incoming water before it could reach the floor. To further protect the space, our team applied the CleanSpace® vapor barrier, sealing the walls against moisture and creating a brighter, cleaner environment. We also installed the powerful SuperSump® system to ensure consistent water removal, even during heavy storms. But we didn’t stop there—we completed targeted exterior drainage improvements to reinforce protection and make certain water stays out for good. Today, that Arlington basement isn’t just cleaner—it’s confidently protected. At NV Waterproofing and Foundation Repair, we believe peace of mind begins from the ground up.

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After

Crawl Space Encapsulation In Warrenton, VA

In Warrenton, VA, a homeowner was struggling with a common but frustrating issue—a damp, dirty crawl space. The space was unusable for storage, and the excess moisture was starting to affect the air quality throughout the home. Knowing the long-term risks of leaving the problem unaddressed, they reached out to NV Waterproofing & Foundation Repair for a solution. When we arrived, it was clear that moisture and humidity were the main culprits. The crawl space had no proper barrier to keep out dampness, which was creating an environment ripe for mold and mildew. Our team recommended a full crawl space encapsulation to not only solve the immediate issues but also prevent future problems. We began by installing a CleanSpace® vapor barrier, which completely sealed the crawl space from the ground up. This heavy-duty liner locks out moisture and creates a clean, dry environment. The encapsulation process also helps regulate humidity levels, improving the overall air quality in the home and even boosting energy efficiency by reducing the strain on the HVAC system. The transformation was remarkable. What was once a damp, neglected area is now a clean, dry, and functional space that the homeowner can confidently use for storage. Beyond the practical benefits, the homeowner now has peace of mind knowing their crawl space is protected for the long term. This project is a great reminder of how important it is to address crawl space issues early. If you’re dealing with a similar situation, taking action now can save you from bigger problems down the road.

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Keeping Pests Out with Crawl Space Fixes in Kensington, MD

When homeowners in Kensington, MD, discovered mice sneaking into their home through the crawl space, they knew it was time to take action. Their outdated crawl space door and a missing block vent were essentially open invitations for pests. These issues not only made the crawl space vulnerable to infestations but also to moisture and energy loss, creating a long list of potential problems. To address these concerns, our expert team got to work. The first step was cleaning out the crawl space to prepare it for a robust, long-term solution. We installed our CleanSpace® system to create a tough barrier that blocks moisture and prevents pests from entering. For added protection, we applied SilverGlo™ insulation, which not only improves thermal performance but also reinforces moisture control. We then sealed the crawl space completely with the installation of a sturdy EverLast door and a new block vent. The EverLast door is made from durable, mold-resistant material and provides an airtight seal to keep out pests and keep the crawl space protected. Together, these solutions transformed the crawl space into a safe, dry, and insulated environment. The benefits? The homeowners now enjoy a pest-free foundation, better energy efficiency, and peace of mind knowing their crawl space is fortified against future issues. This crawl space repair in Kensington, MD, is an excellent example of how our team combines effective products like the CleanSpace® system, SilverGlo™ insulation, and EverLast door to deliver exceptional results that last.

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Sloping floors in Alexandria, VA

In Alexandria, VA, a homeowner noticed their floors sloping, signaling a deeper issue. Noticing in the before photo, the crawl space was in dire need of repair, which led them to us. As you can see in the after photo, we've rejuvenated their crawl space by installing a sturdy beam-supported by six SmartJacks, providing a reliable and lasting solution. By reinforcing their home’s foundation, we've not only fixed the sloping floors but also instilled peace of mind.

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