Stopping Basement Water Intrusion in Merrick, NY

Homeowners in Merrick, NY contacted Zavza Seal after dealing with ongoing water intrusion in their basement. During heavy rain, water was entering through structural wall cracks and along the perimeter of the basement floor. Over time, the moisture created damp conditions, concerns about mold growth, and damage to the basement space.

The homeowners wanted a long-term waterproofing solution that would not only stop the water intrusion but also protect the basement foundation for years to come.

The Problem:

Like many older homes on Long Island, this basement showed signs of hydrostatic pressure pushing water through weak points in the foundation walls and floor system.

The main issues included:

• Water seepage along three basement walls
• Two structural foundation cracks allowing moisture intrusion
• Poor drainage around the basement perimeter
• Risk of future mold and foundation deterioration
• Damp and uncomfortable basement conditions

The homeowners needed a system that could properly collect groundwater, redirect it safely away from the home, and waterproof the affected wall areas.

The Solution:

The Zavza Seal team designed and installed a complete interior basement waterproofing system in Merrick, NY.

First, our crew cut and opened a drainage trench around three walls of the basement floor. Inside the trench, we installed gravel and a 4-inch perforated PVC drainage pipe wrapped with filter fabric. The system was connected directly to a sump basin with a 1/2 HP sump pump.

The ejector pipe was routed safely above the foundation wall and discharged outside the home into a splash block in the garden area to move water away from the foundation.

Next, we repaired the two structural wall cracks using professional epoxy and urethane injection methods designed to permanently seal active water intrusion points.

To strengthen and waterproof the repaired areas, we applied:

• One layer of Basecrete waterproofing cement
• Reinforced 4.5 oz fiberglass mesh
• A second layer of Basecrete waterproofing cement

For additional long-term moisture protection, we installed a Delta high-performance dimpled waterproofing membrane along the interior basement walls. This heavy-duty membrane helps direct water into the drainage system while protecting the foundation wall surface.

Finally, the drain trench was sealed with new 3-inch concrete, troweled level with the existing basement floor for a clean finished appearance.

The Result:

After the project was completed, the basement became significantly drier and better protected against future water intrusion.

The homeowners now have:

• A complete interior drainage system
• Improved basement moisture control
• Structural crack waterproofing
• Better protection against mold and mildew
• A safer and healthier basement environment
• Long-term foundation protection

This basement waterproofing project in Merrick, NY gave the homeowners peace of mind knowing their basement is protected during heavy rain and changing seasonal conditions.

Why Homeowners in Merrick Choose Zavza Seal?

At Zavza Seal, every basement waterproofing project is designed around the actual source of the water problem. Instead of temporary fixes, our team focuses on long-term solutions that help protect the structure, air quality, and value of the home.

Homeowners across Long Island trust Zavza Seal for honest evaluations, professional workmanship, and reliable waterproofing systems built to last.