When concrete starts failing
Concrete deterioration in NYC buildings follows a predictable pattern. Water infiltrates through cracks and construction joints, reaches the embedded reinforcing steel, and initiates corrosion. As the steel rusts, it expands — fracturing the concrete from within. The spalls you see on the surface are evidence of structural damage that's been progressing for years.
Parking decks, balconies, lintels, sills, and structural elements are all vulnerable. In a city where concrete structures endure road salt, freeze-thaw cycling, and decades of deferred maintenance, the deterioration is often more extensive than what's visible.
Types of concrete deterioration
Spalling & Delamination
Concrete fractures and separates from the structure as corroding rebar expands. Spalls expose reinforcement to accelerated corrosion and can present safety hazards.
Cracking & Water Infiltration
Structural and shrinkage cracks allow water to reach reinforcement. Crack injection and sealing prevent further moisture migration and rebar corrosion.
Rebar Corrosion
Corroding reinforcement loses structural capacity and destroys the concrete around it. Exposed rebar must be cleaned, treated, and re-protected.
Carbonation & Chloride Attack
Environmental exposure reduces the alkalinity that protects embedded steel. Once the protective layer is compromised, corrosion accelerates regardless of visible damage.
Restore structural integrity — not just appearance
Concrete repair begins with sounding and delamination surveys to map the full extent of deterioration — not just what's visible. We identify all areas where concrete has separated from reinforcement, even where the surface appears intact.
Repair methodology follows a consistent sequence: remove deteriorated concrete to sound substrate, clean and treat exposed reinforcement, apply bonding agents, and place compatible repair mortar. For structural elements, we verify that repairs restore design capacity.
Concrete spalling or cracking?
Free assessment. We'll determine the extent of deterioration and develop a repair plan.
Preventing recurrence
Concrete repairs last when the water infiltration that caused the original failure is addressed.
Frequently Asked Questions
Structural repair. Done right.
Concrete deterioration accelerates when ignored. Proper repair restores structural integrity and prevents escalation.