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 Paul W. Chattanooga, TN

"Working with Alfredo was excellent from beginning to end!..."

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.

Before

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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After

Crawl Space Encapsulation in Woodbridge, VA

Before crawl space encapsulation and insulation, this Woodbridge, Virginia home struggled with cold floors each winter, rising energy bills, and persistent musty odors from a damp, uninsulated crawl space. After installing CleanSpace encapsulation—a durable vapor barrier—and SilverGlo Wall Insulation, which delivers advanced warmth and moisture resistance, the transformation was immediate. The floors became noticeably warmer, drafts disappeared, and heating costs dropped significantly. Not only did air quality improve, but the home also became more comfortable and energy efficient overall, demonstrating the powerful impact of professional crawl space encapsulation and insulation in Woodbridge, VA.

Before

After

Crawl Space encapsulation in Arlington, VA

A homeowner in Arlington, VA, was troubled by unpleasant smells and cold air coming from their crawl space, making their home uncomfortable and inefficient. To address these concerns, NV Waterproofing & Foundation Repair encapsulated the crawl space with a comprehensive solution. We installed drainage matting to manage water intrusion and CleanSpace, a durable vapor barrier, to block moisture and odors. To improve energy efficiency, we added SilverGlo insulation, which reflects heat back into the crawl space, keeping it warm and reducing energy costs. We also blocked the crawl space vents to prevent cold air from entering and created a new door opening to install an EverLast door, a durable and airtight solution that keeps moisture, pests, and outside air out. With these upgrades, the homeowner now enjoys a clean, dry, and energy-efficient crawl space, free from odors and drafts, making their home more comfortable and healthier.

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