Why NYC Chimneys Need Regular Repair
A chimney rises above the roofline, gets hit by wind from every direction, and experiences full freeze-thaw cycling every winter — sometimes dozens of times between November and March. The mortar at the top courses deteriorates first, then water enters and works its way down the full stack height.
Most chimney leaks in Brooklyn, Bronx, and Queens rowhouses don't appear at the chimney — they appear on interior walls two or three floors below, often mistaken for roof leaks. By the time interior damage is visible, the chimney stack may have years of accumulated water damage.
Chimney Problems We Fix in NYC
- Failed mortar joints throughout chimney height — most common issue on all age buildings
- Spalled or cracked brick — especially on south and west-facing chimney sides
- Missing or cracked chimney crown — the concrete cap at the top that sheds water
- Failed flashing at chimney-to-roof joint — where most chimney leaks actually enter
- Missing or rusted chimney cap over the flue opening
- Efflorescence indicating active water movement through the masonry
Our Chimney Repair Process
- Full inspection from ground level and roof — we assess all four sides of every chimney
- Identify all failure points: mortar joints, brick, crown, flashing, cap
- Itemized estimate — each component priced separately
- File scaffold permit if work is above 40 feet
- Repoint all deteriorated joints with appropriate mortar mix for building age
- Replace damaged brick matched to existing as closely as possible
- Rebuild or repair chimney crown with properly sloped concrete mix
- Replace failed flashing at roof connection
- Install or replace chimney cap
Chimney Pointing vs. Full Repair
Not every chimney needs a full rebuild. If the brick is structurally sound and mortar joints are the only failure point, repointing the full height resolves the problem. Our estimates itemize each component so you can make an informed decision about what to address and what to defer.