Professional Chimney Flashing Repair & Replacement services for homeowners across New York Metro. Licensed, insured, and backed by 25-year warranties.
Chimney flashing is the metal barrier installed where your chimney meets the roof. Its job is to direct water away from this vulnerable joint. In New York, where freeze-thaw cycles are common and heavy snow loads can exceed 30 pounds per square foot, failing flashing is a leading cause of attic leaks and interior water damage. Fixit Roof Ers has replaced hundreds of chimney flashings across New York neighborhoods, from brownstones in Brooklyn to single-family homes in Staten Island.
New York's climate is uniquely hard on chimney flashing. Ice dams form along the roof edge in winter, pushing water up under shingles and behind flashing. Thermal cycling—the repeated expansion and contraction of metal as temperatures swing from below freezing to above—can crack solder joints on copper flashings after just a few seasons. Salt spray from the Atlantic accelerates corrosion on aluminum and steel flashings in coastal areas like Manhattan and Queens. Improper installation, such as missing step flashing or insufficient counterflashing overlap, is another frequent culprit we see in older New York homes.
We offer three primary metal options, each suited to different budgets and longevity expectations. 16-oz copper is our preferred material for New York homes because it resists corrosion, handles thermal cycling well, and can last 50+ years. Galvalume (aluminum-zinc coated steel) is a common mid-grade choice that offers good durability at a lower cost. Aluminum is the economy option but is less durable in New York's freeze-thaw environment and more prone to corrosion from road salt and ocean spray. For all materials, we use flexible, high-temperature sealants—never rigid mortar—to accommodate movement from freeze-thaw cycles.
Our technician inspects the existing flashing, checks for rot in the roof deck around the chimney, and measures the chimney perimeter. We also examine the chimney crown and mortar joints for cracks that could allow water entry above the flashing line.
We carefully remove the old metal, taking care not to damage surrounding shingles or the chimney brick. Any rotted wood decking is replaced with CDX plywood.
We install new step flashing—individual L-shaped pieces—woven between each course of shingles on the sides of the chimney. This creates a watertight interlock that directs water down and over the roof.
Counterflashing is embedded into the mortar joints of the chimney and overlaps the step flashing by at least 3 inches (exceeding code minimum). We use a grinder to cut a reglet into the brick, then secure the counterflashing with lead wedges and sealant.
All joints are sealed with a polyurethane sealant rated for temperature extremes. We clean up all debris, magnets to catch metal scraps, and leave your property tidy.
For a typical New York home, chimney flashing replacement ranges from $800 to $2,500 depending on chimney size, material choice, and accessibility. Copper flashing costs more upfront but offers the best long-term value. Aluminum is the most affordable but may need replacement sooner in coastal areas. We provide free estimates and itemize all costs—no surprises.
New York State Residential Code Section R903.2 requires flashing at all roof penetrations. If the chimney height or structural changes are involved, a NYC Department of Buildings permit may be required. Work over 6 feet in height triggers OSHA fall protection requirements—our crews are fully trained and equipped. We handle all permitting and inspections as needed.
All chimney flashing work by Fixit Roof Ers comes with a 5-year workmanship warranty. Material warranties vary by manufacturer (copper: 50 years; Galvalume: 20 years; aluminum: 10 years). We carry full liability insurance and workers' compensation coverage.
We've been serving New York since 2005, with thousands of satisfied customers across all five boroughs. Our technicians are licensed, insured, and trained in the specific challenges of New York roofing. We don't cut corners—every flashing job meets or exceeds code. Call (877) 349-0250 for a free estimate.
No hidden fees, no surprises. You'll know the full cost before we start any work.
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"Fixit Roof Ers replaced the flashing on our 1920s brownstone in Park Slope. The copper they used matches the original perfectly, and they even regrouted part of the chimney. No leaks since. Professional and fair-priced." — Maria T., Brooklyn
"We had water stains on our ceiling for months. Turned out the old flashing was completely rusted through. The crew from Fixit installed new Galvalume flashing in one day, cleaned up everything, and the stains stopped. Highly recommend." — James L., Queens
"Living near the water in Staten Island, corrosion is a constant problem. Fixit recommended copper for our chimney flashing and it's held up through two winters already. The team was courteous and explained every step." — Patricia K., Staten Island
Ready to get started? Call us today at (877) 349-0250 for a free estimate.