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.
Expert Underpinning Services in Long Island & NYC Metro for Foundation Stability
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When your existing foundation begins to settle, shift, or weaken, underpinning is one of the most trusted methods to restore strength and long-term stability. Underpinning is the process of extending or reinforcing your original foundation so your structure can safely handle more weight, resist movement, and maintain its integrity for decades to come.
In many Northeast homes and commercial buildings, especially those with older construction, changing soil conditions, or moisture problems, underpinning plays a crucial role in preventing bigger issues like cracks, sinking floors, or basement water intrusion.
Premium Technical Services provides expert underpinning and foundation repair on Long Island, the NYC Metro, and surrounding regions. Our team uses advanced techniques, including helical piles and other deep-foundation supports, to strengthen buildings of all sizes.
Because the Northeast faces freeze-thaw cycles, coastal moisture, and diverse soil types, choosing the right underpinning solution is essential. We tailor our approach to each property, ensuring the right process, the right strengthening method, and the right materials for certain types of foundations.
Whether you’re a homeowner, contractor, or commercial property manager, our underpinning solutions deliver reliable, long-lasting support and the peace of mind your building deserves.
Common Causes of Foundation Problems in the Northeast
Foundation issues are extremely common across the Northeast due to the region’s climate, soil behavior, and aging housing stock. These factors can lead to foundation cracks, uneven internal floors, sticking window frames, and the need for professional foundation repair or foundation underpinning. Here are a few frequent causes of foundation issues:
- Soil supporting existing foundations expanding, shrinking, or settling over time
- Ground movement caused by freeze-thaw cycles, coastal moisture, and seasonal temperature swings
- Poorly compacted or shifting soils that create long-term soil issues under the entire building
- Water intrusion from heavy rain, snowmelt, or poor drainage, leading to deterioration and the need for waterproofing
- Erosion around the foundation caused by inadequate gutters, downspouts, or grading
- Aging existing foundations that weaken due to decades of weather exposure
- Plumbing leaks or broken underground lines introducing excess moisture into the soil
- Construction or renovation changes that add load to the original foundation, creating stress and foundation cracks
- Poorly managed stormwater systems contributing to soil washout or settlement
What Is Underpinning? How It Works
Underpinning is the process of strengthening and supporting a foundation wall or concrete slab when the original structure can no longer safely carry its additional load. In the Northeast, shifting soils, moisture, and aging buildings often require updated support systems to ensure long-term foundation stabilization. Underpinning techniques vary based on soil conditions, building type, and the severity of the problem. However, they are all designed to restore stability and prevent further settlement.
Common underpinning solutions in the Hudson Valley, Long Island, and the NYC Metro include:
- Helical piles: Steel shafts with helical plates that thread into stable soil layers, offering immediate load-bearing capacity and minimal disruption.
- Steel piers or driven piles: Installed deep into firm soil or bedrock to support settling structures.
- Concrete underpinning: Traditional method using poured concrete beneath the foundation to extend its depth and improve stability.
Each system addresses issues like soil movement, sinking floors, or weakened foundations by transferring weight to stronger ground. Structural engineers often recommend underpinning for both homes and commercial buildings because it reinforces the foundation, stabilizes movement, and protects the property from ongoing damage.
Benefits of Professional Underpinning Services
Choosing professional underpinning services ensures your house or commercial building receives a safe, engineered approach to long-term foundation stability. When performed correctly, underpinning strengthens weak foundations, addresses ongoing foundation issues, and protects the structure from future damage.
Key benefits include:
- Improved stability by extending the foundation into stronger soil conditions
- A permanent solution that prevents future settlement and sinking
- Reinforcement that adds additional support to weak or aging foundation areas
- Reduced risk of structural damage caused by shifting ground conditions
- Better protection against water intrusion when paired with basement waterproofing
- Restoration of uneven floors, sticking doors, and other symptoms of foundation movement
- Enhanced property value
- Peace of mind knowing the foundation is strengthened with proven, engineered techniques
Why Choose Premium Technical for Underpinning?
When you need trusted underpinning experts who understand the unique challenges of the Northeast, Premium Technical Services delivers unmatched experience and precision. As a family-owned business serving New York since 1973, PTS has many years of hands-on expertise in below-grade waterproofing, grouting, and helical pile installation.
For more than 40 years, we have supplied helical piles in NY, becoming one of the first distributors to bring helical systems from the utility sector into civil construction. This history gives us significant insight into the proper applications, limitations, and engineering behind every system we install.
Our team includes foundation repair professionals, foundation crack repair experts, and certified technicians trained with the latest tools and materials needed for complex projects. Whether you’re dealing with concerns about settlement, soil movement, or aging structures, we provide detailed evaluations and customized solutions.
Premium Technical Services is also a trusted provider of foundation waterproofing in the NYC Metro, supporting homeowners, contractors, engineers, and architects with reliable services backed by industry memberships, continuous training, and decades of regional knowledge.
Underpinning FAQs
Underpinning is a foundation repair method that strengthens your home by extending the foundation deeper or redistributing its weight for better stability. Homeowners often need underpinning when foundation cracks, shifting, or sinking begin to occur, as it prevents further structural damage and protects the long-term value of the property.
Common warning signs include visible cracks, uneven or sloping floors, and doors or windows that suddenly stop closing properly. If you notice any of these issues, it’s important to contact a professional for an inspection, as they may indicate deeper structural problems that require underpinning.
Helical piles offer a fast, durable solution for stabilizing weak or shifting soils. They can be installed with minimal disruption to your yard, making them a cost-effective option that saves you money while providing long-lasting support for your property.
The cost of underpinning varies based on the repair method, extent of damage, and size of the property. Because each situation is different, a professional evaluation is the best way to understand what needs to be done and how much money you’ll need to plan for.
Contact Premium Technical Services Today
If you notice signs of foundation movement or want a professional assessment, now is the time to act. Premium Technical Services provides trusted underpinning and foundation repair solutions throughout Long Island, the NYC Metro, and the Hudson Valley. Our experienced team is ready to evaluate your property and recommend the right approach for long-term stability.
Have questions or need immediate support? Contact us today at (516) 409-6000 to speak with a specialist.