Solving Structural Foundation Cracks and Basement Water Intrusion in Dix Hills, NY

A homeowner in Dix Hills, NY contacted Zavza Seal after noticing multiple structural cracks and ongoing water intrusion issues in the basement foundation walls. Water was entering through several cracked areas, corner joints, and around a thru-wall pipe connection during periods of heavy rain.

The homeowner was concerned about foundation movement, basement moisture, and the long-term stability of the home. They wanted a professional waterproofing and structural reinforcement solution that would permanently stabilize the foundation and stop future water penetration.

The Problem:

During the inspection, the Zavza Seal team identified several serious foundation concerns throughout the basement.

The main issues included:

• Four major structural foundation cracks showing signs of separation
• Additional hidden cracks developing behind older rough patch repairs
• Water intrusion through the inside corner joint of the foundation wall
• Moisture penetration around a thru-wall waste line
• Deteriorated rough patch areas on the basement walls
• Poor drainage conditions inside existing window wells
• Risk of continued foundation movement and cracking

Like many older homes on Long Island, hydrostatic pressure and shifting foundation conditions had caused cracking and moisture intrusion over time.

The Solution:

To properly stabilize and waterproof the basement foundation, our team completed a full crack repair and reinforcement system in Dix Hills, NY.

• Structural Crack Reinforcement with Carbon Fiber Stitching

After further inspection, we determined that four of the structural cracks were actually active separations that required reinforcement beyond standard crack injection methods.

To stabilize the foundation walls, our crew:

• Raked out and cleaned the cracks thoroughly
• Filled the full length and depth of the cracks with high-strength mortar
• Installed carbon fiber stitches every 12 inches to stop further separation and movement
• Applied two coats of Basecrete waterproofing cement
• Reinforced the repair with 8-inch wide 4.5 oz fiberglass mesh

This process helped strengthen the structural integrity of the foundation wall while creating a long-term waterproof barrier.

• Epoxy and Urethane Crack Injection

To fully waterproof the basement foundation, we also repaired four structural cracks using professional epoxy and urethane injection systems.

The repair process included:

• Cleaning and drilling vertically every 6 inches along the cracks
• Injecting epoxy and urethane formulations deep into the cracks
• Stabilizing and waterproofing the foundation wall
• Applying reinforced 4.5 oz Basecrete fiberglass mesh waterproofing cement
• Hard troweling the surface smooth for a clean finish

• Foundation Wall Surface Restoration

Several older rough patch repairs throughout the basement walls had begun to crack and deteriorate.

To improve the wall condition and prepare the surface for future painting, we:

• Ground and polished rough patched areas smooth
• Applied Loctite white coating as a primer finish
• Reinforced visible cracked areas with additional fiberglass mesh waterproofing cement

This helped create a cleaner and more durable basement wall surface.

• Window Well Drainage Improvements

The existing window wells were holding debris and showing signs of poor drainage.

Our team:

• Cleaned out all existing window wells
• Removed debris and old gravel
• Installed new gravel drainage systems
• Added self-sustained drainage protection

Improving the window well drainage helped reduce water buildup around the basement foundation.

• Corner Joint Waterproofing

Water intrusion was also occurring at the inside corner joint of the basement foundation wall.

To repair and waterproof the area, we:

• Removed all loose and deteriorated materials from the joint
• Drilled vertically every 6 inches along the below-grade joint
• Injected urethane and epoxy formulations throughout the full depth
• Applied Basecrete waterproofing cement
• Installed reinforced fiberglass mesh
• Applied a second waterproofing coat to complete the repair

This process created a stronger and more watertight corner joint system.

The Result:

After the repairs were completed, the homeowner noticed a major improvement in basement dryness, wall stability, and overall foundation protection.

The completed project now provides:

• Stabilized structural foundation walls
• Long-term crack reinforcement
• Reduced risk of future wall separation
• Improved basement waterproofing protection
• Better drainage around window wells
• Cleaner and smoother basement wall surfaces
• Reduced risk of mold and moisture damage

This basement waterproofing and foundation crack repair project in Dix Hills, NY helped restore the structural integrity of the home while protecting the basement against future water intrusion.

Why Homeowners in Dix Hills Choose Zavza Seal?

Homeowners across Long Island trust Zavza Seal for foundation crack repair, basement waterproofing, carbon fiber reinforcement systems, and structural stabilization solutions.

Our team focuses on identifying the true cause of basement water intrusion and foundation movement so homeowners receive long-term protection instead of temporary patch repairs.