Serving Connecticut, Westchester and Putnam Counties

Basement Waterproofing

Expert Basement Waterproofing Services throughout CT & Westchester County

Patented, proven solutions for wet, leaky, damp, and musty basements

Here at Connecticut Basement Systems, basement waterproofing is our specialty. Since 1987, we've fixed thousands of leaky, wet, damp and musty basements in Connecticut. We've built a strong reputation in Connecticut for being the best waterproofing company and we always strive to be better than the rest.

We help keep basements dry using our own quality, patented products, such as the TripleSafe sump pump, WaterGuard drainage system and SaniDry dehumidifier. Our waterproofing systems are installed by certified specialists and come with a transferable, lifetime warranty.

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If you have a water problem in your basement in Stamford, Norwalk, West Hartford, or the nearby areas, we can help. Call us or click below to request a no-obligation inspection and free estimate today. We want to help you make your basement dry all the time!

We make your basement dry with customized solutions

Our complete lineup of basement waterproofing products includes all the solutions you need for a dry, comfortable, odor-free basement; no matter what’s causing your issues. We offer many solutions for your home, including:

  • Powerful sump pumps with battery backup
  • Basement drainage systems
  • Energy-efficient dehumidifiers
  • Leaky crack repairs
  • Vapor barriers
  • Waterproof wall panels and flooring
  • Basement windows
  • Water heater flood protection

Besides being the trusted waterproofing company in Connecticut, we're also the parent company of the largest network of basement waterproofing contractors. Our products have been installed in hundreds of thousands of basements and crawl spaces throughout North America.

With no lasting waterproofing solutions available, we decided to develop our own, and created a line of patented basement products. Our tested, proven, award-winning products come with transferable warranties, ensuring your home is protected year after year. 

Before and After
  • Crawlspace Waterproofing
    Crawlspace Waterproofing

    Crawlspace Waterproofing

    Crawlspace waterproofing and vapor seal.

  • Sump Pump and SaniDry Installation in Southport, CT
    Sump Pump and SaniDry Installation in Southport, CT

    Sump Pump and SaniDry Installation in Southport, CT

    In this Southport, CT basement, there had been previous issues with the home's sump pump as well as there being a very outdated dehumidifier that was not performing nearly as well as other dehumidifers nowadays. Once the homeowner's realized these 2 problems, they decided to make a call to Connecticut Basement Systems with regards to having these two machines replaced.

    Once CBS received the call, we quickly were able to bring over our newest sump pump and SaniDry dehumidifier. All that needed to be done was the installation which our team was able to do in a very timely fashion. With these two issues fixed, the homeowners had a much more reliable system in their basement and they were very gratfeul for the quick and professional work we did for them.

  • CleanSpace in Weston, CT
    CleanSpace in Weston, CT

    CleanSpace in Weston, CT

    When these Weston, CT homeowners noticed cold temperatures and excessive moisture in their crawl space, they decided to call Connecticut Basement Systems for a free inspection. 

    Damp crawl spaces often serve as a breeding ground for all kinds of pesky problems: including insects, mold, and foul odors. When left unaddressed, these hazards can quickly spread to the rest of your home. 

    Our representative, Don Goudbout, inspected the problem and  reccomended a series of waterproofing measures to eliminate moisture and prevent cold temperatures within the owner’s crawl space. Soon after, our team installed a CleanSpace vapor barrier to prevent any and all water from entering the area. We also replaced the basement's old, rotting window with one of our signature EverLast windows to ensure maximum insulation.

    Once we completed the job, this homeowner could enjoy a healthier, safer living space -- and keep her utility bills low, too!

  • EverLast Wall Transformation in Fairfield, CT
    EverLast Wall Transformation in Fairfield, CT

    EverLast Wall Transformation in Fairfield, CT

    This Fairfield, CT basement had an open sewer line, which was unattractive and a hazard while people were downstairs. Due to water issues in this basement, the previous wall panels had also been damaged. The homeowners wanted to cover the sewer line and create a clean, usable space and they knew to trust this project with the experts! 


    Our great foreman Chavon and his crew were able to cover up the line by building a room with EverLast walls and a door to give the line easy access. The new EverLast walls also fixed the previously damaged walls and created a new clean, long-lasting look.


    The homeowners were ecstatic with how the room came out. They now have a long-lasting clean, safe space where their family can enjoy time together.

Get a free estimate from your local basement repair expert

Your damp or wet basement can cause more than just a headache; these issues can create bigger problems like mold, mildew, rot, structural damage, and a variety of health problems.

If you think you have a basement waterproofing problem, request a free basement inspection and estimate today. Your certified specialist will find the source of the problem and provide an estimate for the best repairs for your home.

Connecticut Basement Systems offers complete basement waterproofing services in Stamford, Norwalk, West Hartford, Greenwich, Fairfield, Hamden, Poughkeepsie, Milford, Trumbull, Darien and throughout the surrounding areas.

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Exterior Excavation

Heavy equipment is brought in to dig out the entire perimeter of the basement. New drain lines are installed, and sometimes a waterproof coating is applied to foundation walls. This waterproofing strategy is expensive and often damages lawn and garden areas. Exterior drains are prone to clogging with silt and roots over time.

Interior Subfloor Drain

This drain line is installed underneath the basement floor, just inside the foundation walls. The hidden drainage system brings water to a sump pit, where a sump pump automatically pumps it outside. Also known as a French Drain, this system is not prone to clogging; it’s reliable and easy to service.

Interior Baseboard System

A hollow plastic baseboard is installed along the base of basement walls to form a drainage channel that directs water to a sump pump system. A baseboard-type drainage system is sometimes recommended when the basement slab is too thin to accommodate a French Drain.

Negative-side Sealant

This waterproofing technique involves "painting" basement walls and floors with a waterproof, cement-based coating that's supposed to seal out moisture. Even when applied correctly, this thin membrane usually fails in response to prolonged hydrostatic pressure from outside the foundation.