Problem:
A homeowner in St. James, NY reached out to Zavza Seal after noticing a growing step ladder crack along the exterior cinderblock wall of their home. The crack ran vertically near a window opening and had started widening due to seasonal expansion and contraction.
The homeowner was worried about three major issues:
- Structural weakness in the wall
- Water intrusion during heavy rain
- Worsening cracks around the window due to the missing lintel support
These concerns were valid. Step ladder cracks in cinderblock walls often signal structural movement, and if left untreated, they can compromise the wall’s integrity.
Solution:
After a professional inspection, our team designed a repair strategy focusing on structural reinforcement, waterproofing, and long term stability around the nearby window.
Here is how we solved the problem:
1. Precision Surface Preparation
We began by wire brushing and cleaning the entire crack to remove dust, loose mortar, and deteriorated material. This step is essential because it ensures maximum adhesion of structural epoxies and waterproof coatings.
2. Structural Carbon Fiber Stitching
To permanently stabilize the crack, we installed carbon fiber structural stitches every 10 inches along the full 10 linear feet of cracking. Each stitch was embedded in a high strength epoxy that restores tensile strength to the wall and stops lateral movement.
This method creates a reinforced connection across the crack and is approved in structural engineering practices.
For reference, the ICC Evaluation Service explains how carbon fiber is used in structural reinforcement:
3. Mesh Reinforcement and Cement Waterproofing
We applied 4.5 oz fiberglass mesh over the entire repaired area and embedded it into waterproofing cement. This step distributes load, minimizes future hairline cracking, and adds surface strength to the wall.
4. Waterproof Protective Finish
To fully protect the repair, we applied a premium white waterproof coating. This seals out moisture, prevents freeze-thaw damage, and gives the wall a clean uniform appearance.
5. Steel Lintel Installation
The window adjacent to the crack lacked proper structural support, which contributed to the movement in the wall.
Our team installed a 41 inch steel lintel above the window to permanently support the masonry above it. This prevents sagging and reduces the risk of future cracks.
For homeowners who want to understand lintel function, the American Concrete Institute provides reliable educational resources
Outcome:
The wall was structurally reinforced, waterproofed, and stabilized. The homeowner now has peace of mind knowing the wall is safe, durable, and protected from future cracking or water damage. This repair not only restored the property but also extended the lifespan of the masonry structure.