Project Overview:

A homeowner in Stony Brook contacted Zavza Seal after noticing ongoing moisture issues, visible foundation cracks, and signs of water intrusion in the basement.

The home had multiple problem areas, including damaged cinderblock foundation walls, structural cracks in the basement floor slab, and exterior cracks allowing water to enter the foundation system.

The homeowner was concerned that the problems would continue getting worse over time, especially during heavy rain and seasonal temperature changes.

The Problem:

During the inspection, our team identified several serious waterproofing and structural concerns throughout the property.

Foundation Wall Damage and Water Intrusion

The basement cinderblock foundation walls showed signs of deterioration, moisture penetration, and weakened joints in several sections.

Water intrusion was occurring mainly along the lower portions of the walls, with certain areas showing heavier damage and visible wear.

The homeowner also experienced:

• Damp basement conditions
• Water seepage after storms
• Foundation cracking
• Moisture buildup near the floor slab
• Concerns about long-term structural damage

Structural Crack in Basement Floor Slab

An approximately 8-foot structural crack was discovered in the concrete floor slab.

This crack allowed moisture movement through the slab and increased the risk of further deterioration if left untreated.

Exterior Foundation and Crack Problems

Several exterior cracks were also found around the property foundation.

The grading around parts of the home directed water toward the foundation instead of away from it, increasing hydrostatic pressure against the basement walls.

The homeowner wanted a long-term waterproofing solution instead of temporary patchwork repairs.

The Solution:

After evaluating the condition of the home, the Zavza Seal team created a complete waterproofing and structural repair plan focused on stopping water intrusion and strengthening the affected areas.

Interior Foundation Wall Waterproofing

For the damaged cinderblock foundation walls, our team:

• Ground damaged wall surfaces with diamond blades to expose clean concrete
• Deepened and cleaned wall joints
• Removed loose material using steel brushing methods
• Reinforced wall-to-floor connections with 4.5 oz fiberglass mesh
• Applied professional waterproofing materials to seal the surfaces

This process helped stabilize the walls while creating a strong waterproof barrier.

Structural Floor Crack Injection

To repair the structural floor slab crack, we:

• Drilled injection points along the crack
• Injected epoxy and urethane formulations into the damaged area
• Reinforced the repair using fiberglass mesh and waterproof cement

This helped seal the crack while preventing additional moisture penetration through the slab.

Exterior Waterproofing and Grading Improvements

On the exterior foundation areas, the Zavza Seal team:

• Sealed and waterproofed exterior surfaces
• Repaired multiple exterior cracks
• Applied hydraulic cement and waterproofing cement coatings
• Installed reinforced fiberglass mesh systems for additional durability
• Improved grading around the home to direct water away from the foundation

Correcting the grading was important because poor drainage can continue forcing water toward the basement over time.

Structural Crack Repairs

Additional structural cracks near the basement entrance were repaired using:

• Crack chasing and grinding methods
• Epoxy and urethane crack injection
• Waterproof membrane installation
• Reinforced waterproof cement systems

These repairs helped improve both structural stability and moisture resistance.

Full Exterior Basement Wall Protection

The remaining basement exterior walls, covering approximately 684 square feet, were protected using a reinforced Basecrete waterproofing system with fiberglass mesh.

This added an additional layer of strength and waterproof protection to help reduce future cracking and water intrusion risks.

The Results:

After the project was completed, the homeowner noticed major improvements throughout the basement area.

The repairs helped:

• Reduce water intrusion issues
• Strengthen damaged foundation areas
• Improve basement moisture control
• Protect the home against future foundation deterioration
• Create a more stable and protected basement environment

By addressing both the interior and exterior foundation issues together, the homeowner received a more complete long-term solution instead of temporary repairs.

Why Homeowners in Stony Brook Choose Zavza Seal?

Homeowners across Stony Brook and Long Island choose Zavza Seal because they want practical waterproofing solutions based on real inspection findings.

At Zavza Seal, every project focuses on:

• Finding the actual source of the problem
• Using long-term waterproofing methods
• Explaining the repair process clearly
• Improving both protection and structural stability

Our team works with homeowners throughout Long Island and NYC on basement waterproofing, foundation crack repair, crawl space moisture issues, and energy-efficiency improvements.