About Us

Since 1986, NV Waterproofing has ensured healthy basements to Northern Virginia, D.C., and Suburban Maryland. From basement waterproofing to foundation repair and crack repair, they can ensure homes stay safe and dry—free-no-obligation cost estimates in Washington D.C., Arlington, Alexandria, and throughout the surrounding areas. NV Waterproofing received an A+ rating with the Better Business Bureau and Angie’s List Super Service Award.


Services Provided

  • +Basement Waterproofing

    • Basement Window Well Installation & Replacement
    • Exterior Basement Waterproofing
    • Interior Basement Waterproofing
  • +Crawl Space Waterproofing & Encapsulation

    • Crawl Space Access Doors
    • Crawl Space Dehumidifiers
    • Crawl Space Encapsulation & Repair
    • Crawl Space Flood Vents
    • Crawl Space Pump Out Service
    • Crawl Space Vapor Barrier
    • Crawl Space Vent Covers
    • Dig Out Crawl Spaces
  • +Foundation Repair

    • Foundation Replacement
    • Sagging Floor Joist Repair
  • +Sump Pump

    • Sump Pump Installation & Replacement
    • Sump Pump Repair & Service

Company Highlights

By Will
Your team was amazing, from the initial walkthrough and scheduling to installation and cleanup! Thank you and keep up the terrific customer service!
By Dan
Great job crew !
By Paula
Great Job Casey, Ricky and Jose! Thanks NV!!
By Carol
Sean is a true professional with great attention to detail. Very courteous and polite as well.
By Jennifer
Sean did a great job diagnosing the problem with my sump pump and fixing the problem immediately. I would definitely recommend him and the company.
By Sheila
Great job. Very satisfied with work.
By Sheila
Our technician was courteous, polite and did a great job!
By Rory
NV did a great job. Super knowledgeable and helpful and also pointed out some good things for me to fix up.
By Ishu
Rosendo was extremely helpful and went over and beyond.
By Foot
Outstanding
By Peter
Manny's crew was amazing to work with
By Sharen
Sean was very professional and explained everything that was going on. He did a great job.
By Chris
The crew was so professional! Job took some time and was tough (because of heavy rain) but the team made sure our home stayed dry and finished the work with class. Will work with them again in the future for sure and highly recommend NV Waterproofing!
By Carolyn
No problems with the work. Crew was very rofessional.
By James
Special Thanks to the foreman Casey and his crewman Grant, very hard workers. These guys were very professional answered all my questions, practiced social distancing and cdc recommendations with mask and gloves at all times. Process went very smooth and the guys were very professional and compassionate. I will recommend NV to all my neighbors and church for foundation work.
By Joseph
Casey,Grant and Ricky were outstanding. Extremely professional and hard working.
By Tom
Casey and the guys did a great job installing a trench drain in my basement. They were responsive and kept me informed with the steps. I would not hesitate to recommend them to anyone who needs a drain installed or water remediation.
By Sam
Casey Roberto and Jose were efficient friendly and did a great job. Thank you so much.
By A.
Thank you! Would absolutely recommend NV to others.
By Carol Lynne
They were very respectful!
Bryan C.
Marshall, VA
Had Bruce out to do an estimate. He gave us an honest assessment of the situation that no work was necessary. This was after a competitor used scare tactics to try to sell an 18,000$ solution. Highly recommend getting a second opinion (or first!) from NV before deciding on who will do your work. Very courteous and friendly as well.
Donald T.
Purcellville, VA
NV Waterproofing and their crew (Casey, Crew, Kevin, and Grant) were very professional from start to finish, they informed me in the beginning exactly what they were going to do and performed every step with great attention to detail and were very courteous and clean. As a general contractor I would highly recommend them and will continue to use their services for future work.
Daniel P.
Warrenton, VA
A minor delay on the start day proved not to be a problem as the NV Waterproofing crew worked until 8:00 to ensure that the project stayed on schedule. Dust and debris from jack-hammering was far less than anticipated. In short, it was a satisfying experience to have a contractor that put so much attention into customer satisfaction. I cannot find fault worth mentioning without sounding picky from the start to final clean-up of the work site.
Mat and Peggy M.
Ashburn, VA
Your crew worked hard all day, only taking a short time for a quick lunch. The men were neat, completely covering all areas that they used to remove concrete, dirt and debris. They were on task the entire time. We were very impressed. We have had a lot of work completed in our home over the last 38 years, and I am pleased to say that your employees are the most conscientious we have ever worked with.
Hugh S.
Leesburg, VA
He knows his business and is a great rep for you company. A 10 out of 10 experience! 
neha S.
Chantilly, VA
Oswaldo did a great job in walking us through the steps . He was very experienced and clear about the job. The crew started on time , completed much earlier than I had thought ( less than 1 day) and left the space very clean. Oswaldo was good to talk to and answered all out questions. Great work. Thank you Oswaldo. Brian Bui Brian was very good . He was so focused in really trying to understand our problem and providing us a solution . He did not seem to be busy trying to sell products but instead paid all attention to solving our issue . Very customer focused . He always responded to our questions and calls . He even came to check how the job was going on the day of work. Very much appreciated. Thank you Brian. Keep up the good work!!
Kenneth B.
Nokesville, VA
NV Waterproofing gave me an accurate and free estimate. They completed the work on time and on budget even with unexpected complications. Casey, Grant, and Roberto were great. Thank you.
Fred L.
Sterling, VA
The workmen showed up right on time. They were courteous and pleasant – and they told us EXACTLY what they were going to do. Once they dug down to the sewer pipe, Jim was proven correct as the pipe was broken completely in half. Originally, Jim thought the job would take 2-3 days. It was finished in one day – way beyond my expectations. This experience is one of the most satisfying I’ve ever had while having work done on my house. I can’t thank you enough for the courtesy, speed and quality your company provided. The team was fast and accurate. I am forever a customer, and if anyone asks, I will recommend your company as being the best in the business. The experience has been phenomenal, from the first day that Jim showed up to give the estimate right through having all the work done. Kudos to everyone in your company for doing a great job.
J M.
Sterling, VA
The reason for this high review is because of the high quality character of Jim.  NV came to my home to investigate water infiltrating my basement from a front foundation wall.  Jim assessed the problem as best he could, but because I had left the dry wall up he was unable to immediately access the area inside the drywall.  Being at work at the time, I asked my wife to cut back some of the drywall to take a better look.  Jim stayed and not only helped my wife cut away the drywall and remove sopping wet insulation, but helped her find that the problem had originated with a leaking pipe in the wall that we did not know was there.  Although the company policy against removing the drywall themselves seemed odd to me, nevertheless it was their policy.  Jim went above and beyond to help my wife remove the drywall and insulation, which with two small kids was going to be very difficult for her to do by herself.  He helped clean up and was polite and respectful.  While I am grateful I do not have a foundation leak, should I ever have one, I will call NV Waterproofing and ask for Jim.  Quality people are hard to find, thanks man.
Jeff J.
Chantilly, VA
NV Waterproofing was called to a difficult and challenging waterproofing site, and they were able to meet the challenge with confidence and experience. The problems were resolved as were other issues found during job. They were respectful, responsive and thorough. They went beyond just waterproofing.
Jacqueline S.
Manassas, VA
We experienced a house fire and then our basement had a foundation leak. They were quickto come our and resolve the issue that actually fixed the problem! THANK YOU!
Travis B.
Herndon, VA
We used NV Waterproofing (NV) to fix a basement water leak in an addition to our house. NV provided the clearest estimate (we received estimates from multiple companies), with clear pricing and identification of issues. NV completed the work promptly. While the initial work did fix the primary problem, we had a small leak remain. NV was great about coming back out to figure the issue out, and found a surprising construction anomaly causing the second small leak. NV fixed the problem (all as part of the initial estimate) and our basement has been dry since. We were very pleased with NV's persistence and ultimate solution to our problems. We strongly recommend NV.
Heather S.
Reston, VA
We have used NV Waterproofing several times now for different issues that have arisen in our basement. We have found them to be very professional, courteous, and knowledgeable. Unlike many other waterproofing companies which try to sell you very expensive one-size-fits-all whole-house solutions (which are a rip-off with no guarantees), NV Waterproofing takes the time to target your specific problem and provides the most economical and effective approach to the problem. We appreciated their honesty and creativity in designing a plan for our flooding issues. So far, all of their work has held up great! I would highly recommend them.
Carlos L.
Great Falls, VA
I wanted to take a moment to thank you and NV Waterproofing for a job well done. From your visit to our home, to the reasonable estimate, to my communications with Jayne, working with NV Waterproofing has been an excellent experience. The work crew showed up on time, finished in one day and left the basement very clean. My wife commented on how friendly the crew was, and they answered all of her questions. We look forward to rainy days now, without the fear of our basement leaking. Thanks again to all!
Arthur W.
Potomac, MD
Marketing representative Cristian Abrigo explained all aspects of the benefits of encapsulation to prevent and remove mold and the associated odors in my large crawl space. He explained the technical procedure for installation. He answered all my questions about the safety of the product and provided a safety data sheet and references. He was a great guy who went beyond the call of duty to make sure all my questions were answered. Cris was knowledgeable, pleasant and enthusiastic. The installation foreman was also very experienced and knowledgeable. He answered all my questions on arrival and used tarps to cover all the flooring. There was no mess in my house and the install was not invasive or infringing on daily activities. There was no residual odor or unpleasantness after completion. My house and the crawl space were neat and tidy after the installation. Most important, the smell of mold was finally gone from the room above the large crawl space. I highly recommend NV Waterproofing and will use them again for waterproofing in my home. 
Christopher D.
Vienna, VA
Working with Jayne, Jim and their staff was easy and very professional. As a contractor, trusting you project or a portion of your project to another contractor is always an unknown. The entire crew at NV Waterpoofing put my concerns to ease and did an amazing job!! I have already recommended them to several other clients of mine, as well as plan on using them again. Your time, money and investment(your home), is in good hands with NV Waterpoofing!!!
Noah E.
Fairfax, VA
Wanted to thank Megan & Jayne for the professional way in which both of you and Mauricio Carvalho worked with me.   I also wanted to mention the foreman, Mr. Rodriguez, who explained things to me during the work, answered my questions and offered suggestions and alternatives.  He also went out of his way to purchase material and cover the hole in case of inclement weather.  I was very impressed with his knowledge and professionalism, and with everyone who worked on my project, and would be glad to recommend NV Waterproofing to friends.   I can see why NV Waterproofing has received such high marks from "Consumer Checkbook!"   Thank you, Noah  
Janet and Butch N.
McLean, VA
Thanks for doing the job so promptly. Your crew chief was excellent – very nice and professional.
Jonathan J.
Great Falls, VA
What a wonderful and amazing company. I called them because I had cracks in my basement floor.Their representative Bruce came out and he was unbelievably knowledgeable explaining to me what problem I had and why it was nothing to worry about. He could easily have charged me to do a repair as another company had suggested but he told me it was completely unnecessary. He was courteous took his time and unbelievably knowledgeable. What a gentleman and professional. I cannot say enough good things about this company.I highly recommend you call
Daliah L.
Stafford, VA
We are extremely pleased with the outcome of the project and the high caliber of work performed by the crew.
  • Crawlspace Waterproofing in Front Royal, VA - Before Photo
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    Crawlspace Waterproofing in Front Royal, VA - After Photo
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    Crawlspace Waterproofing in Front Royal, VA

    Our client was dealing with a recurrent issue that was causing significant distress. Every time it rained, their crawlspace would flood, and the water would overflow into their home. The client explained the distressing situation of having to resort to using a shop vacuum whenever the weather forecast hinted at rain. This was not just inconvenient but also became a source of constant worry for them.

     

    To address this problem, we decided to install a comprehensive waterproofing system. Our solution was designed to not only tackle the current issue but also to prevent future occurrences, providing the client with peace of mind during rainy weather.

     

    The installation process began with the placement of drainage matting. This matting serves a crucial role in channeling water out of the crawlspace, effectively preventing it from pooling and causing flooding. It provides an effective path for water to flow, directing it towards the drainage system instead of allowing it to seep into the floor.

     

    Next, we installed CleanSpace, a high-quality crawl space vapor barrier that drastically reduces the humidity level in the crawl space. This helps to keep the space dry and significantly decreases the chance of mold growth, which is often a concern in damp environments.

     

    To further enhance the protection against moisture, we encapsulated the crawlspace using SilverGlo insulation. This product has a radiant barrier on the exposed side that reflects heat back into the crawlspace, helping to maintain a comfortable temperature. It also acts as an additional barrier against moisture, ensuring the best vapor protection possible.

     

    Understanding the client's frustration with the continuous use of a shop vacuum, we installed a TripleSafe sump pump system. This advanced system offers three levels of protection, ensuring that even in the case of a pump failure or power outage, the system will still operate efficiently. With this system in place, the client no longer has to worry about manually removing water from the crawlspace.

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    We also installed discharge lines to effectively guide the water pumped out by the sump pump away from the property. This helps to prevent any water from pooling around the foundation and finding its way back into the crawlspace.

     

    Finally, to ensure the durability of our solution, we attached an IceGuard system. This innovative component allows water to escape from the sump pump discharge line if it becomes frozen or blocked for any reason. This feature is particularly beneficial during the colder months when freezing is a common issue.

     

    Through this comprehensive approach, we were able to provide a lasting solution to the client's problem, ensuring their crawlspace remains dry and safe from potential water damage, regardless of the weather conditions.

     

  • Crawl Space Encapsulation in Marshall, VA - Before Photo
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    Crawl Space Encapsulation in Marshall, VA - After Photo
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    Crawl Space Encapsulation in Marshall, VA

    The client expressed worry over their crawlspace, which was plagued by excessive standing water and humidity. To ensure the crawlspace remains clean and dry, we outfitted it with a new sump pump, supplemented by silver glow and a Cleanspace liner.

     

  • Basement Waterproofing in Hillsboro, VA - Before Photo
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    Basement Waterproofing in Hillsboro, VA - After Photo
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    Basement Waterproofing in Hillsboro, VA

    We recently installed a Clean Space Liner in Hillsboro, Virginia. This innovative liner is specifically designed to minimize humidity levels, effectively preventing the growth of mold and formation of bacteria in the air. Unlike wall coatings, this liner is secure, ensuring it will not peel off over time.

  • Interior waterproofing Culpeper, VA - Before Photo
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    Interior waterproofing Culpeper, VA - After Photo
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    Interior waterproofing Culpeper, VA

    The homeowner in Culpeper, Virginia was grappling with the issue of water seeping into their basement. To address this problem, we proposed a comprehensive waterproofing system for their home. Our solution included the installation of a WaterGuard system, which is designed to manage and redirect any excess water effectively. We also planned to set up an external drainage line and a CleanSpace wall system to prevent future water intrusion. In addition to this, we recommended the installation of a new SuperSump pump to efficiently manage water flow, an IceGuard on the discharge line to prevent freezing and blockages, and a LawnScape outlet to discreetly disperse water away from the property.

  • Clean Space Liner  Leesburg, Virginia - Before Photo
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    Clean Space Liner  Leesburg, Virginia - After Photo
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    Clean Space Liner Leesburg, Virginia

    We have installed a Clean Space Liner in Leesburg, VA. This liner effectively reduces humidity in the air, resulting in the elimination of mold growth and bacteria.

  • Basement Waterproofing in Waterford, VA - Before Photo
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    Basement Waterproofing in Waterford, VA - After Photo
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    Basement Waterproofing in Waterford, VA

    In Waterford, VA, basement waterproofing was carried out using Cleanspace and Waterguard basement systems. These systems are designed to keep water out of basements and prevent damage.

  • Trench drain Installation in Paeonian Springs, VA - Before Photo
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    Trench drain Installation in Paeonian Springs, VA - After Photo
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    Trench drain Installation in Paeonian Springs, VA

    Water was entering garage on heavy rains. TrenchDrain was installed in front of the garage door, and discharge lane installed to bring the water away from the garage. 

  • Basement Waterproofing in Warrenton, VA - Before Photo
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    Basement Waterproofing in Warrenton, VA - After Photo
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    Basement Waterproofing in Warrenton, VA

    WaterGuard Drainage System with CleanSpace Vapor Barrier

  • Exterior Waterproofing in Leesburg, VA - Before Photo
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    Exterior Waterproofing in Leesburg, VA

    Homeowner in Leesburg, VA received an exterior waterproofing complete with exterior discharge line, and ice guard .

  • Bowing Walls in Elkwood, VA - Before Photo
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    Bowing Walls in Elkwood, VA

    The customer expressed a high degree of concern regarding a horizontal crack that had formed in the basement foundation walls of their home. This issue is understandably alarming, as the structural integrity of the entire house relies on the foundation. It's an issue that can't be ignored or put off, as the potential consequences could be severe.

     

    In response to this, we proposed and implemented a comprehensive solution for reinforcing the foundation. Our team installed a PowerBrace and Powerguard system. The PowerBrace system is designed to stabilize failing basement walls and can help to reverse the damage by straightening the wall over time. It's an ideal solution for when there is bowing, tipping, or bulging happening to the basement walls.

     

    The Powerguard system, on the other hand, is specifically designed to protect the PowerBrace system against any form of corrosion. This ensures that the PowerBrace system will remain robust and durable for a long time, providing ongoing support to the foundation.

     

     

     

Angi Super Service Award 2021

Angi Super Service Award 2021

Better Business Bureau - A+ Rating

Better Business Bureau - A+ Rating

7th Year as Best Pick

7th Year as Best Pick

Angie's List Super Service Award 2016

Angie's List Super Service Award 2016

Angie's List Super Service Award 2015

Angie's List Super Service Award 2015

Angie's List Super Service Award 2014

Angie's List Super Service Award 2014

Angie's List Super Service Award 2013

Angie's List Super Service Award 2013

Angie's List Super Service Award 2012

Angie's List Super Service Award 2012

Angie's List Super Service Award 2011

Angie's List Super Service Award 2011

Angie's List Super Service Award 2010

Angie's List Super Service Award 2010