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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
PolyLevel Concrete Leveling & Lifting
Mudjacking & Slab Jacking Alternatives
Concrete Sidewalk Repair & Leveling
EZ Post Deck Repair
Shotcrete Wall Restoration
Foundation & House Leveling


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


Company Awards
Hearst Media Top Places to Work
Basement Systems was awarded one of Connecticut’s Top Workplaces in 2018. This is the 5th time Basement Systems has won... [Read more]
HomeAdvisor's Top Rated Professional 2018
We are proud to be HomeAdvisor's top rated professional! More than 90% of homeowners that left us a review would... [Read more]
Best of HomeAdvisor 2018
We maintained an average rating of 4.0 and we are proud of it! This badge speaks for itself, we hace... [Read more]
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Thornwood, NY Dependable Basement Waterproofing & Foundation Repair

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
  • Helical Deck Piers
  • Sticking Windows
  • Underpinning

PolyLevel™ Concrete Leveling & Lifting

The sunken and cracked concrete around your Thornwood home is both an eyesore and a safety hazard. It is also likely to get worse, but we can fix it for you.

Our experts use PolyLevel, a superior polyurethane foam. Small holes are drilled in the concrete, the foam is injected and the expanding foam lifts the concrete. The majority of contractors you will call use mudjacking instead of foam. Mudjacking is heavier, require larger holes in the concrete and does not last as long as PolyLevel. Call us today to learn more.

We Fix
  • Cracked Driveways
  • Uneven Patios
  • Sinking Sidewalks      

  • Uneven Concrete
  • Sunken Pool Decks
  • Highway & Commercial Issues



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
Westerly Ln South in Thornwood
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
Westchester Ave in Thornwood
Concerned about where water comes into the basement and possible cracks in the foundation.
Whittier Drive in Thornwood
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
Locust Street in Thornwood
Garage/basement flooding
Carlisle Avenue in Thornwood
I have an unfinished basement. Would like to know the cost to finish it up.
Kensico Road in Thornwood
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
Palmer Lane in Thornwood
I would like an estimate to have a sidewalk raised about 1"
Lilac Place in Thornwood
Would like an inspection of foundation for settling. You are currently installing a super sump pump in my cellar.

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