The Problem:

A homeowner in Flushing, NY contacted Zavza Seal after noticing water leaking into their basement during heavy rain.

The issue was located at the top section of two foundation walls, where the homeowner had removed old spray foam insulation. Once the foam was removed, hairline cracks became visible, along with water entering through the cracks and around electrical conduit penetration points.

Key issues identified:

• One wall had approximately 6 linear feet of cracking
• The second wall had approximately 18 linear feet of cracking
• Water was entering through fine foundation cracks
• Additional leaks were found where electrical conduits passed through the wall
• Moisture risk near electrical components created a safety concern

If left untreated, these cracks could have led to mold growth, structural weakening, and continued basement water damage.

The Solution:

Our Zavza Seal team designed a long term waterproofing and structural repair solution to fully seal the cracks and protect the foundation.

Step 1: Site Protection and Containment

We installed plastic sheets sealed from floor to ceiling to isolate the work area. This kept dust and debris from spreading to the rest of the basement and protected the homeowner’s space.

Step 2: Surface Preparation

The exposed strip at the top of both foundation walls was ground using diamond blades. This removed loose material and exposed clean, bare concrete, which is critical for a strong and lasting repair.

Step 3: Injection Port Installation

Using diamond drill bits, we installed injection ports every 6 to 8 inches along the cracks. Extra care was taken around the electrical conduit penetration points, where water intrusion was most active.

Step 4: Crack Injection and Waterproofing

We injected a combination of epoxy and polyurethane into the cracks.

• Epoxy restored structural strength
• Polyurethane expanded to block water intrusion

This dual injection method ensures both durability and waterproofing.

Step 5: Reinforced Cement Coating

To finish the repair, we applied a 4.5 oz reinforced fiberglass mesh over the repaired area. This mesh was sandwiched between two layers of 6,000 PSI waterproofing cement. Where needed, professional adhesives and sealants were added for extra protection.

The Result:

• All foundation cracks were fully sealed
• Water intrusion was completely stopped
• Electrical conduit entry points were properly waterproofed
• The foundation walls were structurally reinforced
• The homeowner gained a dry, safe, and protected basement

This Flushing homeowner now has peace of mind knowing their foundation is protected against future water damage.

Why This Repair Method Works in Flushing, NY?

Homes in Flushing and Queens often experience foundation issues due to:

• High groundwater levels
• Heavy seasonal rainfall
• Older concrete foundations
• Utility penetrations added over time

Crack injection combined with reinforced cement coating is one of the most effective foundation waterproofing methods for NYC homes.

Need Foundation Crack Repair in Flushing or Queens?

Zavza Seal specializes in foundation crack repair, basement waterproofing, and moisture control throughout Flushing, Queens, and Long Island.

If you are seeing water stains, damp walls, or cracks in your foundation, early repair can save thousands in future damage.