The Problem: Structural Crack Compromising Integrity of Concrete Slab
A homeowner in Port Jefferson Station, NY contacted Zavza Seal after discovering a large structural crack in their concrete slab, measuring approximately 22 linear feet. Over time, this crack had begun to widen and showed clear signs of material degradation, raising concerns about the long-term stability and water resistance of the slab.
Structural cracks in concrete slabs not only weaken the foundation but also allow water intrusion, which can cause further damage and mold growth. The client wanted a durable, long-lasting repair that would restore structural integrity and waterproof the area effectively.
The Solution: Expert Concrete Slab Crack Repair by Zavza Seal
Our team at Zavza Seal performed a thorough inspection and proposed a multi-step repair strategy designed to strengthen the slab and prevent future issues. Here is how we addressed the problem:
Step 1: Surface Preparation
We began by chasing the entire crack area with diamond blades. This process removed all loose and damaged materials, exposing the bare concrete and creating a clean surface for proper adhesion of repair materials.
Step 2: Structural Reinforcement
To ensure the slab regained its load-bearing capacity, we cut deep slots into the concrete core perpendicular to the crack at intervals of 24 inches along the entire length. These slots were then filled with a high-strength structural epoxy to bond the surrounding concrete.
Next, we installed non-corrosive carbon stitches into the epoxy-filled slots. These carbon stitches, capable of withstanding 6,500 pounds of pulling force each, provided significant reinforcement to the slab and restored its structural integrity.
Step 3: Waterproofing and Finishing
Once the structural repairs were complete, we applied a layer of Basecrete waterproofing cement over the repaired area to seal it from moisture. While the cement was still damp, we embedded a 4.5 oz reinforced fiber mesh to add strength and flexibility to the repair.
To finish the job, we applied a final layer of 7,000 PSI waterproofing cement over the fiber mesh, ensuring a smooth, durable, and waterproof surface.

The Result: Restored Strength and Protection
Thanks to our comprehensive repair approach, the concrete slab in Port Jefferson Station was restored to its original strength and fully waterproofed. The client was pleased with the quality of workmanship and the peace of mind knowing their property was once again structurally sound.
Why Choose Zavza Seal?
At Zavza Seal, we specialize in concrete crack repair, structural reinforcement, and waterproofing for residential and commercial properties in Port Jefferson Station and surrounding areas. Our team uses advanced materials and proven techniques to deliver long-lasting results.
If you are facing structural cracks in your concrete slab or foundation, contact Zavza Seal today for a professional evaluation and expert repair service.