Family-owned and operated since 2000, Complete Basement Systems (CBS) is proud to be Long Island’s longest-standing basement and crawl space repair company. For more than 25 years, we’ve helped homeowners protect their most valuable investment by preventing water and humidity damage. Our consultative approach sets us apart—we don’t just fix problems, we educate homeowners and deliver tailored solutions designed for lasting peace of mind.
Founded in 1984, PTS Foundation Supply (PTSFS) has been the Northeast’s go-to resource for helical piles, driven anchors, and installation equipment. From design to installation, we know how complex foundation projects can be. That’s why professionals across the region count on our 100+ years of collective experience to provide reliable products, expert insight, and a partnership that helps every project start—and finish—on solid ground.
Since 1973, Premium Technical Services (PTS) has been the Tri-State area’s trusted partner in foundation repair, below-grade waterproofing, and grouting. With more than 50 years of service and over 100 years of combined expertise on our team, we bring proven solutions to keep your foundation strong, dry, and secure for the long run.
Family-owned and operated since 2000, Complete Basement Systems (CBS) is proud to be Long Island’s longest-standing basement and crawl space repair company. For more than 25 years, we’ve helped homeowners protect their most valuable investment by preventing water and humidity damage. Our consultative approach sets us apart—we don’t just fix problems, we educate homeowners and deliver tailored solutions designed for lasting peace of mind.
Founded in 1984, PTS Foundation Supply (PTSFS) has been the Northeast’s go-to resource for helical piles, driven anchors, and installation equipment. From design to installation, we know how complex foundation projects can be. That’s why professionals across the region count on our 100+ years of collective experience to provide reliable products, expert insight, and a partnership that helps every project start—and finish—on solid ground.
Foundation & Basement Waterproofing Solutions
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In the Northeast, heavy rains, snowmelt, and aging foundations often lead to water intrusion problems in basements and crawl spaces. Without the right protection, property owners face costly foundation repair, damaged basement walls, and persistent moisture that can harm both structural integrity and indoor air quality. If you’re dealing with a wet basement, Complete Basement Systems provides proven solutions designed to last.
Since 1973, our team has combined deep technical expertise with certified installation practices to deliver permanent results, not temporary fixes. We design and install advanced systems, including interior and exterior waterproofing, drainage solutions, sump pumps, and moisture control for floors, basement walls, and crawl spaces. Our approach addresses the root causes of hydrostatic pressure and water seepage, ensuring long-term protection for your property’s value.
For residential homes on Long Island, Complete Basement Systems is trusted for professional basement waterproofing that keeps your space secure, dry, and functional.
Permanent Basement Waterproofing Solutions
Stop Water, Mold, and Structural Damage
Unchecked water seepage through basement walls, foundation walls, or floors can lead to mold growth, cracks, and long term structural damage. As soil around your home or building becomes saturated, hydrostatic pressure forces water into the concrete, weakening surfaces and creating costly repair needs. Our basement waterproofing systems are engineered to stop moisture at the source, protect air quality, and prevent deterioration.
Designed for Residential Buildings
Every home is unique. That’s why our solutions are tailored for homeowners. By addressing water intrusion where soil, concrete, and air meet, Complete Basement Systems ensures lasting protection.
Signs You Need Basement Waterproofing
Standing Water or Damp Floors
One of the most obvious warning signs of water intrusion is pooling water or damp flooring. If you notice water seeping into the basement or crawl spaces, it may be time to install a sump pump or explore interior and exterior drainage solutions before further structural damage occurs.
Musty Odors and Visible Mold
Persistent musty smells or patches of mold and mildew are indicators that excess moisture is trapped inside your basement or crawl spaces. Left unchecked, these conditions can spread to other areas of your home, negatively impacting air quality and leading to costly remediation.
Efflorescence or Wall Staining
White powdery deposits (efflorescence) or water stains on foundation walls are often early warning signs of water seeping through the exterior into the interior. These issues suggest that hydrostatic pressure is driving moisture into the concrete and should be addressed with professional basement waterproofing.
Wall Cracks or Bowing
Foundation cracks or bowing basement walls are serious indicators of structural damage caused by water pressure and soil movement. If these issues are visible, your foundation is at risk and requires immediate evaluation and reinforcement to protect the building’s safety.
High Indoor Humidity
When damp air lingers indoors, it creates an ideal environment for mildew and mold growth. High humidity levels in basements and crawl spaces are often linked to hidden leaks or water seeping through foundation surfaces. Professional waterproofing solutions can restore balance and keep your property covered against future damage.
How Our Basement Waterproofing System Works
At Complete Basement Systems, we use proven techniques to protect your basement foundation from water intrusion. Our systems are designed to manage hydrostatic pressure, control moisture at the ground level, and deliver long lasting results. By combining multiple methods, we don’t just patch over problems. We fix the source and ensure quality protection for years to come.
Drainage Methods
A reliable drainage system is the first line of defense against water. We design and install systems that redirect and relieve hydrostatic pressure, preventing water from building up and trying to force water through basement walls or floors.
Sealants
High-performance sealants provide a protective barrier on the interior surfaces of your basement foundation. This added layer blocks minor leaks and prevents moisture transfer, creating a cleaner and drier space.
Epoxy Injection
For cracks in basement foundation walls, epoxy injection is a permanent repair solution. This process bonds the concrete back together, seals against seepage, and restores strength to prevent further structural issues.
Exterior Waterproofing
Exterior protection addresses water before it ever reaches the basement. By applying advanced membranes and coatings to the outside of foundation walls, we create a durable barrier against water intrusion from surrounding ground and soil pressure.
Why Choose Complete Basement Systems?
Engineered Solutions for Difficult Site Conditions
From aging basement structures to properties built on challenging soil, we deliver tailored waterproofing solutions that address the toughest site conditions. Our engineered systems control moisture and prevent mold, protecting both structural integrity and indoor air quality.
Full Service Installation and Repair Team
Our certified team handles every step of the process, from diagnosis to installation and repair. Whether it’s sealing leaks, reinforcing walls, or updating basement waterproofing systems, we provide full service care that eliminates moisture and safeguards your property long term.
Commercial-Grade Systems for Residential Properties
We apply the same high-performance waterproofing systems trusted in industrial environments to residential projects. By using commercial-grade products and methods, we ensure that every basement is protected against moisture intrusion, water damage, and potential mold growth.
Long-Term Performance and Reliability
Unlike temporary fixes, our solutions are built for decades of protection. By addressing the root cause of water intrusion, we ensure long-term basement waterproofing performance, keeping moisture out, mold away, and your property value secure.
Related Services
- Installation of dehumidifiers for improved air quality and moisture control
- Interior and exterior drainage systems to manage water at the source
- Professional crawl space repair to fix structural and moisture issues
- Full crawl space encapsulation for long-term protection against dampness and mold
- Expert foundation repair to restore stability and prevent structural damage
- Preventative and corrective foundation repair services for residential properties
Schedule a Waterproofing Inspection
If you’re experiencing basement water problems in your house, it’s time to take action before the damage worsens. Complete Basement Systems provides on-site assessments and expert recommendations to identify the source of water intrusion and design a permanent solution tailored to your property.
Proudly serving residential customers in Nassau and Suffolk Counties (Long Island), our team delivers proven results that protect your investment and keep your spaces dry and secure. Don’t wait until small leaks become major repairs. Schedule your waterproofing inspection today.
Give our team a call at 516-409-6000Â to get started with a free quote.