Serving Connecticut, Westchester and Putnam Counties

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Reviews From Thornwood
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


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

Thornwood, NY Dependable Basement Waterproofing & Foundation Repair

Chuck was great help to me! I also love the products that Connecticut Basement Systems offers....
Happy Customers Surrounding Thornwood, NY
Work Requests

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Basement Waterproofing & Crawl Space Repair in Thornwood, New York

Do you have water in the basement? Is your crawl space damp? This leads to mold, rot, musty odors and structural issues. It also leads to a reoccurring headache for you. Luckily, our trained experts are available to permanently fix the problem.

We will properly install a hidden drainage system in your Thornwood basement and completely encapsulate your crawl space with CleanSpace vapor barrier. We are here to solve the problem for you.

Why Choose Us?
  • Lifetime Warranty on all Perimeter Waterproofing Systems
  • 25-year Warranty on Crawl Space Encapsulation Systems
  • Sump Pump Installation, Repair & Replacement
  • Basement, Crawl Space & Spray Foam Insulation
  • Basement Egress Windows
  • Crawl Space & Basement Dehumidifiers
  • Over 27 Years of Experience
  • Hundreds of Satisfied Customers

Basement Finishing & Remodeling in Thornwood, NY

Waterproofing your basement prevents outside water from coming in but what if a pipe bursts or the water heater leaks inside the home. A newly finished basement done by your average contractor will mold and rot if there is an internal leak. You'll have to tear out your new basement! We fix this issue.

Our Products Include :
  • Waterproof, washable, insulated walls           
  • Mold-Resistant, No-Sag suspended ceiling
  • Modular carpet, tile & faux wood flooring

  • Energy-efficient, double-paned basement windows
  • Attractive Sunhouse basement window wells
  • French, bifold, louvre & six-paneled steel doors
Unlike the average Thornwood contractor we use completely inorganic, waterproof materials. Even if the basement floods your walls and floors will not be damaged by the water. These waterproof products are patented and are built to create an attractive finished basement that lasts a lifetime.

Structural & Foundation Repair in Thornwood

Foundation problems destroy your Thornwood home’s value and can be dangerous. Our in-house team of structural and geo-technical engineers are here to help. We design and install the right solution and usually have the project finished in less than a week. You will have peace of mind as we provide a 25-year written warranty against defects on our foundation products.

We Fix
  • Bowing Walls
  • Sagging Floors
  • Stair-Step Cracks
  • Tilting Chimneys  
  • Foundation Cracks
  • Garage Slabs   
We Use
  • Wall Anchors
  • Slab Piers
  • I-Beam Wall Braces
  • Sticking Windows
  • Underpinning



Job Stories From Thornwood, NY
WaterGuard and ThermalDry Flooring in Thornwood, NY

This Thornwood, NY home had a water issue in his basement that prevented him from utilizing the space to its full potential. He also wanted to have a finished area for all to enjoy. After doing his research he decided to trust the experts at Connecticut Basement Systems and schedule a free, no obligation appointment.

On the day of the appointment, Sales Representative Gary Meglino arrived at the home to evaluate the basement. He concluded that the water issue would need to be addressed first. He recommended a WaterGuard system which will collect water internally before it enters the basement. It will then channel the water to the SuperSump that will discharge the water away from the home. This system will keep the basement dry. In addition, Gary suggested to have new flooring and wall restoration done to make the basement dry and enjoyable. After reviewing each product thoroughly, the homeowner decided to follow through with the project.

On the day of installation, Foreman Al Guglielmoni and his crew installed the WaterGuard System and SuperSump pump professionally and efficiently. Once the waterproof system was placed, Foreman Kevon Barnett installed wall restoration and ThermalDry elite pecan flooring. The wall restoration will replace the water damaged walls that were previously in the basement and will resist any mold or mildew growth. The ThermalDry flooring not only looks beautiful, but it is waterproof and warmer compared to traditional concrete flooring. This is exactly what the homeowner had wanted and was pleased with his waterproofed and finished basement! 

Work Requests From Thornwood, NY
Project Location: Thornwood, NY
Water seepage in one corner of basement
Project Location: Thornwood, NY
Need French drain, sum pump, maybe new basement windows and egress.
Project Location: Thornwood, NY
Selling a home that showed some water in basement.
Project Location: Thornwood, NY
We just moved into a house and looking to get a quote and suggestions on how to best insulate our crawl space in a split level under the kitchen, dining room and living room.
Project Location: Thornwood, NY
I would like a quote on a crawl space barrier installation
Project Location: Thornwood, NY
Basement Finishing Estimate
Project Location: Thornwood, NY
I recently purchased this house so I don't have much history to talk to you about. The basement shows signs of previous water damage but tested dry at time of home inspection. There was some normal damnpness that a dehumidifier took care of. However, after yesterday's rain storms I have significant water in in my basement. Not a ton, not even a 1/8 of an inch, but it was wet, and I m in the process of turning it into a kids playroom, so any water is bad. I would appreciate a cost a talk about my options a pricing them. Thank you
Project Location: Thornwood, NY
Concerned about where water comes into the basement and possible cracks in the foundation.
Project Location: Thornwood, NY
About 6 months ago had water seep in basement after heavy rainfall. With rain past few days I'm seeing for the first time since then rain beginning to seep in again. I've only been in the house less than two years, I personally took up all carpets and removed Sheetrock 4ft and down. I can now see exact areas of vulnerability. Would like to see what a more permanent solution would cost. Thanks
Project Location: Thornwood, NY
Garage/basement flooding
Project Location: Thornwood, NY
I have an unfinished basement. Would like to know the cost to finish it up.
Project Location: Thornwood, NY
Water seeps into basement of store approximately two feet below grade and about 10 ft long when it rains basement exterior wall is poured concrete. Additional information: How Would You Like To Be Contacted?: Email
Project Location: Thornwood, NY
I would like an estimate to have a sidewalk raised about 1"
Project Location: Thornwood, NY
Would like an inspection of foundation for settling. You are currently installing a super sump pump in my cellar.