Problem
Our team at The Mudjacking Contractors was called in to inspect and address structural concerns involving six concrete slabs in Northport, NY. Each slab measured approximately 24 square feet. The property owner reported visible sinking of the slabs and signs of water damage in the basement area.
Upon detailed inspection, we discovered that extensive exposure to water had compromised the soil integrity beneath the slabs. The layers of soil had developed substantial voids and gaps due to erosion and water penetration. These empty pockets caused the slabs to settle and sink unevenly, creating trip hazards and structural vulnerabilities.
In addition to being a physical hazard, these uneven slabs could not be effectively waterproofed in their current state. If left unaddressed, continued deterioration of the soil plates would lead to further damage not only to the slabs themselves but also to the nearby foundation. Additionally, water penetration in the basement was observed along the red-marked lines on the concrete walls, indicating failure in waterproofing and sealing.
Solution
To restore the integrity and safety of the property, our team implemented a mudjacking concrete raising solution.
Step 1: Mudjacking the Concrete Slabs
We began the process by drilling precise holes into each sunken concrete slab. Through these holes, we pumped a specially formulated stone slurry grout beneath the slabs. This grout filled the hidden voids completely and evenly, stabilizing the soil beneath.
As the voids were filled, hydraulic pressure gently lifted each slab back to its original level. Care was taken to ensure the concrete sloped slightly away from the foundation to support future water drainage and prevent future water accumulation.
Step 2: Waterproofing the Slabs and Foundation
Once the concrete slabs were realigned, we waterproofed and sealed all joints between the slabs and the foundation wall. This additional step ensured no future water could penetrate the area and cause similar damage. Sealants were also applied to the expansion joints for a long-lasting barrier against moisture.
Step 3: Basement Waterproofing
To address the water penetration in the basement, we began by grinding the affected area to remove all loose and damaged materials, exposing the bare concrete underneath. Once prepped, we installed a 4.5 oz reinforced fibermesh which was sandwiched between two layers of high-strength 7,000 PSI waterproofing cement.
This method not only sealed the current leaks but also reinforced the structural durability of the wall. Adhesives and sealants were applied to complete the waterproofing process.
Results
The mudjacking concrete raising method successfully leveled the slabs, restored structural integrity, and eliminated future water-related risks. The basement area was fully sealed, reinforced, and waterproofed. As a result, the property is now safe, structurally sound, and protected against future moisture intrusion.
Conclusion
This project in Northport, NY, demonstrates the effectiveness of mudjacking concrete raising combined with advanced waterproofing solutions. By addressing the root cause of the sinking slabs—voids in the soil caused by water exposure—we were able to provide a cost-effective, long-lasting solution. The Mudjacking Contractors continues to deliver expert-level results in concrete and foundation repair throughout Long Island.
If you’re experiencing similar issues, contact The Mudjacking Contractors today for a professional assessment and repair plan.
