The Problem

A homeowner in Syosset, NY was dealing with significant water intrusion throughout the basement. Water was entering through the floor and foundation wall areas, causing damage to flooring, insulation, framing materials, and finished surfaces.

The basement had experienced repeated moisture issues, creating conditions that allowed mold growth and increasing concerns about indoor air quality.

During our inspection, we also discovered three structural cracks in the concrete slab that required repair. In addition, the foundation wall footing in the theater room and gym area showed signs of structural deterioration and loss of integrity.

The homeowner needed more than a temporary fix. They needed a complete waterproofing and structural repair solution that would address the source of the water intrusion while strengthening the foundation.

Our Solution

After a thorough evaluation, the Zavza Seal team designed a comprehensive waterproofing and structural restoration plan.

Basement Waterproofing System Installation

To gain access to the source of the water intrusion, we first removed the existing vinyl plank flooring throughout the basement.

We then:

• Removed damaged drywall around the basement perimeter.
• Removed water-damaged insulation.
• Removed sections of framing studs and baseplates where necessary.
• Exposed the foundation wall and floor joint for waterproofing work.

Next, we installed a full interior drainage system around the perimeter of the basement and through the center of the floor.

Our team:

• Cut and excavated approximately 215 linear feet of drainage trench.
• Installed a 4-inch perforated PVC drainage pipe.
• Surrounded the pipe with washed gravel.
• Installed a soil separator to prevent clogging.
• Connected the system directly to the sump basin.
• Re-poured high-strength concrete flush with the existing slab.

Smart Sump Pump Installation

To ensure reliable water management, we upgraded the sump pump system.

The new system included:

• A 1/2 HP primary sump pump.
• A battery backup pump for power outages.
• WiFi-enabled monitoring technology.
• Real-time alerts and remote monitoring capabilities.

This setup provides protection even during severe weather and electrical outages.

Mold Remediation

Because prolonged moisture exposure had created conditions for mold growth, our licensed mold remediation team performed a complete treatment process.

The remediation included:

• Wire brushing affected surfaces.
• Sanitizing exposed materials.
• Applying an all-natural disinfectant treatment.
• Encapsulating vulnerable surfaces to prevent future growth.
• Running commercial air scrubbers.
• Operating commercial dehumidifiers for several days to dry the environment thoroughly.

Before rebuilding the walls, we monitored the basement through multiple rain events to confirm that all water intrusion pathways had been successfully eliminated.

Insulation and Wall Restoration

Once the basement remained completely dry, we rebuilt the finished wall system.

This included:

• Reinstalling framing components.
• Installing containment netting.
• Blowing in cellulose insulation with an R-value of approximately 19.
• Installing new drywall.
• Taping and finishing all wall surfaces.

Structural Crack Repair

The basement floor contained three structural cracks that required reinforcement.

To restore structural integrity, we:

• Opened the cracks using diamond blade equipment.
• Installed deep repair slots across the cracks.
• Filled the slots with structural epoxy.
• Installed non-corrosive carbon fiber stitches.
• Applied high-strength repair mortar.
• Embedded reinforced fiber mesh.
• Finished with a layer of 7,000 PSI waterproofing cement.

This repair system helps stabilize the concrete while reducing the risk of future movement.

Foundation Footing Reinforcement

Further investigation revealed that approximately 80 linear feet of footing beneath the theater room and gym area had deteriorated.

To strengthen the structure, we:

• Saw cut and excavated along the footing.
• Installed steel dowels into the existing concrete.
• Added #5 reinforcing steel bars throughout the repair area.
• Constructed new concrete forms.
• Poured high-strength 4,000 PSI concrete to create a reinforced footing system.

This repair restored structural support and improved the long-term stability of the foundation.

The Result

The project completely transformed the basement from a water-damaged environment into a dry, protected, and structurally reinforced living space.

The new drainage system now captures groundwater before it reaches the finished basement. The upgraded sump pump system provides continuous protection, while the structural repairs strengthen critical areas of the foundation and floor slab.

The homeowner now benefits from:

• A dry basement.
• Improved indoor air quality.
• Long-term mold prevention.
• Enhanced structural stability.
• Modern water management technology.
• Greater confidence during heavy rain events.

By combining waterproofing, mold remediation, crack repair, and structural reinforcement into one coordinated project, Zavza Seal delivered a permanent solution designed to protect the home for decades.

Why Interior Drainage Systems Work

Many basement leaks occur where the foundation wall meets the floor slab. Interior French drain systems collect water before it reaches finished areas and direct it safely to a sump pump system. When combined with structural repairs and mold remediation, they provide one of the most effective long-term solutions for basement water intrusion.

Need Basement Waterproofing or Foundation Repair in Syosset, NY?

Zavza Seal specializes in basement waterproofing, structural foundation repair, mold remediation, drainage systems, and concrete restoration throughout Long Island and the greater New York area.

Our team identifies the root cause of water intrusion and develops long-lasting solutions that protect both the structure and the health of your home.