Serving Connecticut, Westchester and Putnam Counties

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A Free Estimate!
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 Old Lyme
Beautiful Crawl Space Transformation in Old Lyme, CT

Beautiful Crawl Space Transformation in Old Lyme, CT

Before After
Beautiful Crawl Space Transformation in Old Lyme, CT Beautiful Crawl Space Transformation in Old Lyme, CT

Mark K. was complaining about a damp smell in the basement and coming from the crawl space and they were also concerned with cold floors above the crawl space. He wanted a solution, and he wanted one fast, so he gave us a call at Connecticut Basement Systems, and we were happy to come and see how we could solve his problem!

Our System Design Specialist, Ferdinand Gojani, came out to survey the space, and assess what needed to be done. The first thing he suggested was a CleanSpace Radiant Vapor Barrier. This bright, white vapor barrier completely transforms a crawl space, while also working to reduce moisture and humidity within the crawl space. It also helps seal out cold drafts in the winter, and is suitable over walls and floors. We also installed a SaniDry dehumidifier, which is designed to provide many years of energy-efficient, trouble-free performance, even in tough crawl space conditions. SilverGlo rigid foam insulation was also installed. This rigid foam insulation shed water instead of soaking it up like cellulose and fiberglass insulation. The best part? It doesn't support mold EVER. 

This crawl space was transformed from dark to dazzling, and this family can now use the space for storage! Call us TODAY for your free, crawl space estimate!

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

Old Lyme, CT's Respected Crawl Space & Foundation Repair Pros

Ailton is knowledgable, articulate, and accurate. ...
Happy Customers Surrounding Old Lyme, CT
Work Requests

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Reviews From Old Lyme
Testimonials From Old Lyme
Dan was very thoughtful, efficient, and honest.
Testimonial by Mary W. from Old Lyme, CT
We had the pleasure of having Allan Guglielmoni and crew worked on our basement yesterday. They did Great job and completed it in one day. The basement looks...
Testimonial by Joe F. from Groton, CT
Al and his crew did a phenomenal job! They were clean and efficient, and they do high quality work. I can't speak highly enough of them.
Testimonial by Mark B. from Old Lyme, CT

Old Lyme, 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 Old Lyme:

  • 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 Old Lyme and areas nearby!

Trusted basement waterproofing company serving Old Lyme

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 Old Lyme:

  • 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 Old Lyme 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 Old Lyme

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 Old Lyme:

  • 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 Old Lyme and areas nearby.

Reliable crawl repair & encapsulation services in Old Lyme

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 Old Lyme:

  • 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 Old Lyme and areas nearby.

Transform your home with basement finishing in Old Lyme

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 Old Lyme:

  • 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 Old Lyme 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 Old Lyme - 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 Old Lyme and nearby areas.

Job Stories From Old Lyme, CT
TrenchDrain installation in Old Lyme, CT

The basement of this Old Lyme, CT home had a hatchway, with stairs leading into the basement from the outside. Water was able to enter the basement through the crack under the door. They needed this to stop, so they gave us at Connecticut Basement Systems a call, and we were happy to come out and help!

To prevent this, our team installed a trench drain at the end of the stairs. This open grated drain collects water into the perimeter drainage system, preventing it from entering the basement. Both parts are made from heavy-duty reinforced plastic, so you’ll never need to worry about breakage, moisture damage, corrosion, or maintenance.  The homeowners now have a dry basement to enjoy, and we were happy that we could offer a solution to their problem.

Give us a call TODAY for your FREE estimate!

Work Requests From Old Lyme, CT
Project Location: Old Lyme, CT
Basement window replacement questions on basement too
Project Location: Old Lyme, CT
A slab along the front of the house the has settle pitching inward toward the house. Wondering if it can be jacked up with foam or another means
Project Location: Old Lyme, CT
I have water in my crawlspace
Project Location: Old Lyme, CT
Finish basement
Project Location: Old Lyme, CT
Wet basement needs waterproofing also install shelving for storage
Project Location: Old Lyme, CT
Crawl space insulation
Project Location: Old Lyme, CT
We just had flooding during Ida and want to see what it will take to waterproof. We were planning to finish part of the basement, so this is key to being able to go forward with that Plan
Project Location: Old Lyme, CT
We have a crawl space that needs waterproofing
Project Location: Old Lyme, CT
Interested in exploring dehumidification solutions for our finished basement. Our store-bought dehumidifiers are not doing the job.
Project Location: Old Lyme, CT
I would like someone to inspect my crawl space for problems
Project Location: Old Lyme, CT
Foam spray basement
Project Location: Old Lyme, CT
We are looking to finish the basement. The area is roughly about 600 sq ft. We are still undecided on adding a half bathroom.
Project Location: Old Lyme, CT
Looking for a quote for crawl space encapsulation with a dehumidifier
Project Location: Old Lyme, CT
It's a 1920's home. Old basement. Just pulled up the floors and there is a lot of moisture
Project Location: Old Lyme, CT
Annual maintenance appointment
Project Location: Old Lyme, CT
First floor seems to have shifted
Project Location: Old Lyme, CT
Buying a house and need a free inspection to remediate dirt crawl space
Project Location: Old Lyme, CT
Excess moisture in crawl space causing mold issues inside home
Project Location: Old Lyme, CT
Need a vapor barrier
Project Location: Old Lyme, CT
Crawl space settling is leading to uneven floors and cracked Sheetrock around some windows and door frames.