The Problem: Water Intrusion at a Basement Foundation Wall in Sunnyside, NY
In Sunnyside, NY, a homeowner contacted Zavza Seal after noticing persistent moisture and water seepage along the rear basement foundation wall. The signs of trouble were clear—musty odors, discoloration, and visible cracks in the wall. These symptoms pointed to water intrusion, likely coming through a structural foundation crack, which could compromise not only the basement environment but also the structural integrity of the home.
Adding to the challenge, the affected section was located behind a wooden deck, limiting access to the foundation wall.
This was more than just a surface-level issue—it required a professional, long-term waterproofing solution tailored to the unique conditions of the property.
Initial Assessment
Our certified team at Zavza Seal performed a detailed site inspection and confirmed:
- A vertical foundation crack was present behind the home, allowing groundwater to seep into the basement.
- The deck structure partially blocked access to the wall.
- The site required below-grade excavation to repair the crack and apply an external waterproofing system to ensure lasting protection.
The Solution: Full Exterior Basement Foundation Waterproofing
To stop the water intrusion and restore the basement’s integrity, our team executed a multi-step exterior waterproofing process designed to:
- Permanently seal the crack
- Divert groundwater away from the foundation
- Restore the structure and aesthetics of the property
Step 1: Deck Disassembly for Access
We began by removing a section of the wood deck at the rear of the house. Each part was carefully labeled and set aside to allow reinstallation once waterproofing work was complete.
Step 2: Excavation to the Footing
Our crew excavated the soil down to the foundation footing, fully exposing the cracked wall area. This step is essential to ensure all affected material is accessible and treatable.
Step 3: Crack Repair with Hydraulic Cement
We cleaned and sealed the visible crack using hydraulic cement, a fast-setting material ideal for sealing against water under pressure. This first layer stops active water penetration.
Step 4: Reinforcement with Fiberglass Mesh Cement
To strengthen the repaired area, we applied a 4.5oz reinforced fiberglass mesh waterproofing cement over the crack. This adds a layer of structural integrity and improves the bond between surfaces.
Step 5: Liquid Waterproof Membrane Application
Next, we applied a liquid waterproofing membrane over the full exposed wall section. This flexible, durable coating ensures seamless water protection and adapts to small foundation movements.
Step 6: Delta Waterproofing Membrane Installation
To finalize the defense system, we installed a Delta waterproofing membrane, extending it below the footing to channel groundwater safely away from the wall. This helps mitigate hydrostatic pressure, a common cause of water entry in basement walls.
Step 7: Reassembling the Deck
After completing all waterproofing tasks, our team reassembled the wooden deck, restoring the home’s exterior to its original condition—no visible signs of construction or disruption.
✅ The Result: A Dry, Secure Basement in Sunnyside, NY
After the waterproofing system was installed, the client reported:
- Zero water infiltration, even after several heavy rainstorms
- Improved indoor air quality and reduced musty odors
- No structural shifting or cracks after weeks of observation
- Full restoration of their outdoor deck and yard space
The homeowner in Sunnyside, NY, was not only relieved but impressed with the professionalism, cleanliness, and efficiency of the Zavza Seal team.
📍 Why Exterior Waterproofing Was the Right Choice
In this case, exterior foundation waterproofing was the most reliable and long-lasting solution. Unlike temporary interior fixes, this approach:
- Stops water before it enters the structure
- Reinforces the existing foundation wall
- Eliminates the root cause of moisture: hydrostatic pressure
- Extends the life of the basement and home structure
What Makes Zavza Seal a Top Basement Waterproofing Contractor in NY?
Zavza Seal specializes in foundation waterproofing services across Sunnyside, Long Island, Queens, Brooklyn, and the Bronx. We bring:
- Certified professionals trained in below-grade waterproofing
- Top-tier materials like Delta membranes and fiberglass mesh cements
- Minimal disruption with complete site cleanup and restoration
- Full warranty on workmanship and waterproofing systems
Do You Have a Similar Water Intrusion Issue?
If you’re seeing water stains, cracks, or mold in your basement—especially near the foundation walls—don’t wait for the damage to spread.
We offer free inspections and customized waterproofing plans tailored to your property’s conditions.
📞 Get in Touch
Looking for trusted basement waterproofing contractors in Sunnyside, NY, or surrounding boroughs? Zavza Seal is just a call away.
📍 Serving:
- Sunnyside & All of Queens
- Brooklyn & Long Island
- The Bronx and surrounding NYC neighborhoods
✅ Professional solutions
✅ Fast turnarounds
✅ Long-lasting protection
Final Takeaway
This project in Sunnyside, NY, is a perfect example of how commercial-grade materials and expert application can completely transform a wet, damaged basement into a dry, healthy, and safe space.
Don’t settle for patch jobs. Trust Zavza Seal for comprehensive, code-compliant waterproofing systems that stand the test of time.
Call now for a free estimate (631) 980-1800