Client Location: Westhampton, NY
Service Type: Foundation Waterproofing, Crawl Space Encapsulation, Bilco Door Installation

The Problem: Structural Weakness, Water Intrusion & Poor Insulation

A homeowner in Westhampton, NY contacted Zavza Seal LLC after years of dealing with water intrusion, foundation concerns, and crawl space inefficiencies. Multiple issues were identified across different parts of the property, including:

• A deteriorating Bilco entrance and staircase
• Water penetration during heavy rains and snowstorms
• Poorly insulated and debris-filled crawl space
• Foundation cracks and structural weaknesses that were allowing moisture entry and heat loss

The Solution: Multi-Area Structural & Waterproofing Upgrades by Zavza Seal LLC

Our certified team performed a comprehensive overhaul of the affected areas, delivering code-compliant construction, reliable waterproofing, and energy-efficient insulation.

✅ Subject Area: Bilco Door and Entrance Staircase Replacement

Challenges:

• The Western Bilco foundation wall and staircase were damaged and outdated.
• Structural instability and water seepage at this junction posed safety and durability issues.

Solution:

• Demolished and removed the damaged Bilco wall and staircase.
• Excavated westward 16 inches to prepare for reconstruction.
• Installed a new cinder block foundation wall, reinforced and waterproofed using liquid rubber membrane.
• Applied a Delta dimpled membrane for added water redirection and exterior wall protection.
• Repaired the surrounding foundation using 4.5 oz fibermesh sandwiched between two layers of 7,050 PSI waterproofing cement.
• Installed a new, pressure-treated staircase compliant with building codes.
• Completed the section with a brand-new Bilco door, enhancing access and safety.

✅ Subject Area: Entrance Door to Crawl Space

• Sealed and insulated the crawl space entrance to prevent air leakage and improve climate control.

✅ Subject Area: Pit Near Entrance to the Crawl Space

• Installed a code-compliant staircase for safe and easy access to the crawl space.

✅ Subject Area: Crawl Space Overhaul and Encapsulation

Challenges:

• The crawl space was cluttered, rugged, poorly insulated, and prone to moisture.
• The homeowner needed both air sealing and thermal protection, plus surface smoothing.

Solution:

• Removed all debris to allow safe and clean access.
• Applied 550 lbs. of high-quality mortar mix on rugged floor sections to smooth the concrete slab, reducing tripping hazards and voids.
• Installed Styrofoam panels on exposed wall surfaces and repaired any damaged insulation sections.
• Installed a 20-mil thick crawl space membrane across all wall surfaces, floors, and cinder block columns, with a 3″ gap left exposed at the top for future termite inspections.
• Applied SealTech 10M reflective insulation (R-value 18) across the ceiling between joists, creating an airtight thermal barrier.

✅ Subject Area: Water Penetration Areas (3 Locations Identified by Owner)

Challenges:

• During recent snow and heavy rain, water was observed entering the basement from three distinct points, including under the deck.

Solution:

• For each location:
  • Excavated down to the bottom of the footings.
  • Cleaned foundation walls with steel brushes.
  • Repaired cracks using 4.5 oz fiber mesh + 2 layers of waterproofing cement.
  • Applied liquid rubber membrane for long-term waterproofing.
  • Backfilled and regraded the soil to ensure water is directed away from the foundation.
• In the deck area, removed planks for access and reinstalled them after the waterproofing was complete.

Project Outcome & Homeowner Satisfaction

Following the extensive repair and waterproofing work, the home is now:

• Structurally sound and compliant with building codes
  
• Free from crawl space moisture and basement leaks
  
• Protected with modern insulation and drainage systems
  
• Equipped with a new Bilco door, staircase, and sealed access points
  

The client was thrilled with the transformation and praised Zavza Seal LLC’s attention to detail, craftsmanship, and ability to tackle multiple issues with a cohesive plan.

Need Crawl Space & Foundation Waterproofing in Westhampton, NY?

Whether you need a Bilco door replacement, foundation crack repair, or full crawl space encapsulation, trust Zavza Seal LLC for reliable, long-lasting results. Serving Westhampton, Long Island, and beyond, we specialize in custom waterproofing and structural repair solutions.

📞 Contact us today for a consultation and let us protect your property—inside and out.