Serving Connecticut, Westchester and Putnam Counties

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Products & Services
Basement Waterproofing Services & Products
WaterGuard Interior System
DryTrak Drainage Channel
TrenchDrain Drain Grate
IceGuard Discharge Line
FlexiSpan Wall Crack Repair
Polyurethane Crack Sealing
WellDuct Window Drainage
BrightWall Waterproof Panels
ThermalDry Wall Barrier
Basement To Beautiful Pre-finishing Wall Insulation Panels
Drain Tile Installation
SuperSump Pump System
TripleSafe Pumping System
UltraSump Battery Back Up
Sanidry Basement Dehumidifier
French Drain Alternatives


Crawl Space Repair Services & Products
CleanSpace Encapsulation Vapor Barriers And Liners
Turtl Access Hatch
EverLast Crawl Space Doors
Sanidry Csb Crawl Space Dehumidifier
SmartDrain Water Drainage
SilverGlo Wall Insulation
TerraBlock Floor Insulation
SmartSump Sump Pump
Crawl-o-Sphere Crawl Space Fan
WallCap Block Wall Sealer
SmartVent Flood Vents


Foundation Repair Services & Products
Push Pier Underpinning For Settlement, Foundation Leveling, Sinking Foundation Repair
Geo-lock Wall Anchors
Geo-lock Helical Anchors
PowerBrace Bowed Wall Repair
CarbonArmor Fiber Wall Repair
SmartJack Crawl Space Support
Slab Pier Repair
Foundation Underpinning
EZ Post Deck Repair
Shotcrete Wall Restoration


Basement Finishing & Remodeling
Everlast Wall Panels
Insulated Wall Panels
Premier And Linen Ceiling Tiles: No-sag Warranty
Thermal Dry Floor Tiles
Sunhouse Window Wells
Everlast Window Replacement
Rockwell Basement Egress Windows


Before and After Pictures from New London
Basement Waterproofing in New London CT

Basement Waterproofing in New London CT

Before After
Basement Waterproofing in New London CT Basement Waterproofing in New London CT

The B. Family had a crack in their basement that was a real pain. Every time it rained, water would come into the basement, and anytime it snowed, the snow would eventually melt and water would come in. The homeowners called the experts at Connecticut Basement Systems to make sure the issues was taken care of. We came in and diagnosed the problem and recommended our FlexiSpan® crack repair system. 

The FlexiSpan® is unlike hydraulic cements and some epoxies: the special polyurethane polymer sealant used for FlexiSpan® will never dry out or re-crack even given the natural movement of the foundation wall over long periods of time. The homeowners can now rest assured that the basement will not take on water from that crack.

WaterGuard and CleanSpace in New London, CT

WaterGuard and CleanSpace in New London, CT

Before After
WaterGuard and CleanSpace in New London, CT WaterGuard and CleanSpace in New London, CT

This New London basement had reoccurring water issues that were making the area unusable. The constant water would leave a musty odor and the clean-up process was beyond frustrating for the homeowner. She wanted a solution to solve the constant water problem and to get rid of the distressing smell. The homeowner decided to call Connecticut Basement Systems for a free home estimate. 

The solution for this basement was to install a WaterGuard System. This system is installed internally around the perimeter of the walls and then is concealed with cement. (You can see the wet cement in the after photo.) The WaterGuard System will collect water internally and channel it out to the sump pump. The sump pump will then take the water and disperse it through the discharge line. A CleanSpace liner is beneficial for this basement because it acts as a moisture barrier which will prevent any water from seeping through the walls. (You can see the CleanSpace Liner on the walls in the after photo)

Once the installation was finished, the basement was waterproofed and the musty odor was eliminated. This is exactly what the homeowner wanted and could not be happier with the results.

Company Awards
2017 Angie's List Super Service Award
Connecticut Basement Systems has been awarded the 2017 Angie's List Super Service Award®! The Angie’s List Super Service Award honors... [Read more]
Larry Janesky award the Valley of Chamber of Commerce's Silver Medal Award
Larry Janesky was awarded the Valley Chamber of Commerce's Silver Medal Award for the Big Build at Ansonia Nature Center!... [Read more]
Best Places to Work
For the 3rd time, Basement Systems has won the Best Places to Work award for being one of the best... [Read more]
More Awards

New London, CT's Go To Basement Waterproofing Experts

You did a fabulous job. Worth every cent!!!...
Happy Customers Surrounding New London, CT
Work Requests

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Reviews From New London
Testimonials From New London
Our sales person gave me his cell number and checked on us during a really wet few days. He even responded to me at like 9:00pm when I texted that I was...
Testimonial by Margaret from New London, CT
Your salesman didn't make it seem like we were being sold stuff but more giving information and recommendations on how to resolve the problem.
Testimonial by Lisa H. from New London, CT
I chose your company because you have the best customer service and because of your innovation and thoroughness of presentation.
Testimonial by Sherri V. from New London, CT

New London, CT's expert in basement waterproofing, foundation repair, & more

Connecticut Basement Systems has been your trusted home improvement company providing reliable basement waterproofing, foundation repair, crawl space encapsulation, basement finishing, and more to over 85,000 Connecticut homeowners since 1987. As a three-time winner of the CT Better Business Bureau's Torch Award for Marketplace Ethics, we are committed to creating an honest and reliable experience with our customers.

Whether you need a moisture-proof basement waterproofing system complete with a sump pump or permanent foundation settlement repairs, we provide these solutions and much more!

Our services in New London:

  • Basement waterproofing
  • Foundation repair
  • Crawl space repair
  • Basement finishing
  • Air purifiers
  • And more!

Schedule a free estimate to learn more. Connecticut Basement Systems proudly serves New London and areas nearby!

Trusted basement waterproofing company serving New London

A wet basement can affect your home more than you think. If left to worsen, water in the basement can cause structural issues, mold growth, pest problems, and more. That is why Connecticut Basement Systems provides patented basement waterproofing solutions, designed to keep your below-grade space dry and healthy for years to come! So, if you're tired of dealing with basement flooding, high humidity, water in basement, or other waterproofing issues, contact our experts today!

Our basement waterproofing services in New London:

  • Sump pump installation & maintenance
  • Basement drainage systems
  • Basement Dehumidifiers
  • Basement windows
  • Egress windows & window wells
  • And more!

Since 1987, we have provided warrantied basement waterproofing solutions to New London homeowners - this includes sump pumps, basement dehumidifiers, french drains, and more. Schedule a free basement waterproofing estimate to learn more!

Permanent foundation repair solutions in New London

No matter how minor your home's foundation problem seems, it is always better to schedule a foundation inspection and get repairs sooner than later. That is because issues like foundation settlement, leaning chimneys, bowing walls, and more can affect your house's value and curb appeal. Even worse, they can create unsafe living conditions for you and your family.

But there is no reason to worry - Connecticut Basement Systems is backed by Supportworks, a nationally renowned network of expert foundation repair contractors. This partnership also gives us exclusive access to professional training, warrantied solutions, and best practices proven by hundreds of dealers across the globe.

Our foundation repair services in New London:

  • Slab piers
  • Push piers
  • Helical piers
  • Foundation wall repairs
  • Crawl space support jacks
  • Wall anchors
  • Wall reinforcing systems
  • And more!

Schedule a free foundation repair estimate to learn more. We proudly serve New London and areas nearby.

Reliable crawl repair & encapsulation services in New London

A nasty crawl space can cause a lot of issues for the home. If left unrepaired and unsealed, the crawl space can start to rot and grow mold, leading to structural issues, unhealthy indoor air, and discomfort throughout the house. That is why Connecticut Basement Systems provides moisture-proof crawl space encapsulations and durable structural repairs.

When we seal the crawl space using a moisture-proof vapor barrier, add a high-performance crawl space dehumidifier, install crawl space jacks for failing support posts, and provide other crawl space repair solutions, we can create a dry, secure below-grade space for years to come!

Our crawl space encapsulation & repair services in New London:

  • Crawl space vapor barrier
  • Crawl space drainage system
  • Crawl space dehumidifier
  • Crawl space insulation
  • Crawl space support jacks
  • And more!

Schedule a free crawl space repair and encapsulation estimate to learn more. We proudly serve New London and areas nearby.

Transform your home with basement finishing in New London

Want to transform your dreary basement into the space of your dreams? From a lavish apartment to a new play area for the kids, Connecticut Basement Systems can help you with these remodeling projects and more - the only limit is your imagination! Unlike other basement finishing contractors, we actually use remodeling products designed to withstand common environmental conditions in the below-grade space, including moisture and mold. Plus, the basement finishing system is warrantied, has insulating qualities, dampens noise, and is eco-friendly.

Our basement finishing system in New London:

  • Finished basement flooring
  • Waterproof wall products
  • Ceiling tiles
  • Basement dehumidifiers
  • Replacement windows
  • Egress windows & window wells
  • And more!

Schedule a free basement finishing estimate to learn more. We proudly serve New London and areas nearby.

Quality basement waterproofing, crawl space repairs, & more since 1987

Connecticut Basement Systems is the largest basement waterproofing, foundation repair, crawl space encapsulation, and basement finishing company in New London - and for good reason. We are committed to improving the lives of our employees, customers, and the world through education and development. For over 30 years, we have built a solid reputation backed by honesty and expertise. So you can have absolute confidence in our services!

Contact us to schedule a free estimate today. We proudly serve New London and nearby areas.

Job Stories From New London, CT
Waterproofing in New London CT

Wet spots in a basement are always a sign of concern and, when Susie D. found them in her basement, she knew that towels would help only so much.  Susie began researching companies and found Connecticut Basement Systems soon after.  She then met with waterproofing specialist Michael Lane, who had a solution to her water spot problem.

With Michael’s guidance, Luis and his crew came in and installed a Trench Drain and WaterGuard combo to ensure the current water would drain effectively out of her basement.  A SuperSump sump pump was also installed to ensure future flooding would be a problem of the past.  Finally a SaniDry Dehumidfier was installed to eliminate all future threat of excess moisture in the basement.

With Susie’s basement taken care of, Susie knows that the experts at Basement Systems know what they are doing and will hopefully continue to use their expertise for any of her future house problems!

Work Requests From New London, CT
Project Location: New London, CT
Discovery of foundation cracks while demo being done in the basement due to a water leak. Helical piers may be the best way to go and I'd like to schedule an appointment for someone to come take a look a s discuss options. Thank you.
Project Location: New London, CT
Pricing on finishing my basement
Project Location: New London, CT
I would like to flooring to my basement floor Thermal Dry tiles actually
Project Location: New London, CT
I'm doing a basement remodel, I've had new sheet rock put up and made a bedroom area, that area, the main living space, the bathroom and laundry room needs flooring, new ceiling tiles, 3 vew windows and the outside window wells, an inside door leading through a small entranceway to the sideyard and an external door. I'd like to get a shower installed and replaced the bathroom vanity.
Project Location: New London, CT
Comment: Source BrandBlaster Service TBF
Project Location: New London, CT
Wet, very humid smelly basement. Mold concerns. Historic home. Partial dirt crawlspace needs to be finished
Project Location: New London, CT
Project Location: New London, CT
We have a leaky basement near the bulkhead and a window area that needs repair. Looking forward to hearing from you.
Project Location: New London, CT
Our local plumber suggested contacting you to take a look at our basement and make some suggestions. This is a medical office and the basement has had issues with water for years so we would like to explore some options going forward
Project Location: New London, CT
I would like to have a dehumidifier installed.
Project Location: New London, CT
Selling home and need to have repairs made to beams in crawl space found by home inspection. 1 beam has prior termite damage & another sagging.
Project Location: New London, CT
I am looking to reconfigure my basement as well as have it inspected for issues prior to making any changes.
Project Location: New London, CT
Wet basement, needs to be waterproofed, and refinished
Project Location: New London, CT
The crawl space is about 14 feet by 26 feet, the floor upstairs get cold during winter time so I think i may need insulation also, sometimes it does get wet from water coming from the back but it dries fast just need an estimate to see if I can afford it now or for next year, thanks
Project Location: New London, CT
Looking for quote to remodel basement.
Project Location: New London, CT
Basement is in decent shape and we don't get any water after storms. We would like to also install at least a half bath down there, but a full bath with small stand up shower would be ideal if we have the clearance. We are in a crunch to get this done before October, so time is also a major concern.
Project Location: New London, CT
Having occasional flooding in my basement during winter and spring seasons.
Project Location: New London, CT
Intrested in sealing 800 sf crawl space that opens to basment?
Project Location: New London, CT
I have a 1928 home that gets water in around the foundation when it rains heavily. I'm finally ready to do something about it.
Project Location: New London, CT
Ground water leaking into basement