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Commercial Chimney Repair for NYC Buildings and Boiler Stacks

One licensed commercial chimney contractor for masonry, liner, flue, structural, and leak repairs, bringing existing commercial chimneys and boiler stacks back to safe, code compliant operation across every NYC borough and Long Island.

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  • Certified and Licensed
  • Lifetime Warranty
  • 48 hr Proposal Turnaround
  • Emergency Service 24/7

OVERVIEW

Existing Commercial Chimneys Restored to Safe, Code Compliant Operation

Commercial chimneys and boiler stacks run under heavier loads than residential equipment, so deteriorated masonry, failing liners, corroded flue pipe, and water intrusion can trigger a boiler shutdown, a code violation, or a safety risk for tenants and staff. We diagnose the root cause with camera scans, smoke and draft testing, and photographic documentation, then repair the system and issue a certificate of cleanliness and functionality for your compliance and insurance files.

Property managers, building owners, general contractors, mechanical contractors, and facility engineers work with one accountable team from the first inspection through the finished repair and the lifetime warranty on the systems we install. We plan every repair around occupied spaces and continuous boiler operation so your building keeps running while the work gets done.

  • 20+ Years in Business
  • 1,000+ Projects Completed
  • 48 hr Proposal Turnaround
  • 24/7 Emergency Service
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WHAT WE REPAIR

Commercial Chimney Repairs We Handle

Masonry and Structural Repair

Brick stacks that carry heavy exhaust loads and years of weather exposure lose structural integrity as joints deteriorate and sections spall. We repoint failing joints, rebuild damaged sections, and repair crowns and flashing to stop the decay and keep tall exterior stacks sound and stable.

  • Brick repointing and section rebuilds on commercial stacks
  • Crown repair and flashing correction
  • Structural assessment and stabilization of tall exterior stacks

Liner Repair and Relining

A damaged or worn liner cannot draw toxic gases and smoke out of the building safely, which puts occupants at risk and fails inspection. We repair compromised liners and complete commercial chimney relining with a stainless steel liner sized to your existing flue, restoring proper containment and draft.

  • Liner inspection with camera scans to confirm the failure
  • Stainless steel relining sized to the existing flue
  • Post repair draft and containment verification

Flue Pipe Repair

Corroded, disconnected, or undersized flue pipe leaks combustion products and disrupts venting for commercial boilers and appliances. We repair and replace flue pipe and breeching for oil and gas systems, correcting connections and sizing so exhaust is contained and vented as designed.

  • Boiler flue and breeching repair for oil and gas systems
  • Connection, joint, and support corrections
  • Sizing correction to match appliance venting requirements

Leak and Water Intrusion Repair

Water entering through a cracked crown, failed flashing, open chase, or spalling stucco spreads hidden damage through the structure and into the building below. We trace the point of entry, seal the assembly, and repair the failed components so moisture stays out and the surrounding damage stops.

  • Leak diagnosis and point of entry tracing
  • Crown, flashing, chase cover, and cap sealing and repair
  • Stucco and enclosure repair with finish matching to the facade

Draft Related Repairs on Boiler and Appliance Stacks

Poor draft causes exhaust to back up, appliances to lock out, and boilers to run unsafely. We diagnose the cause, correct the venting conditions, and repair or replace mechanical draft fans and controls so boiler and appliance stacks vent reliably under load.

  • Draft testing and combustion venting correction
  • Chimney fan, draft inducer, and control repair and replacement
  • Post repair draft verification and airflow testing

OUR PROCESS

How a Commercial Repair Moves from Call to Certificate

01

Assessment and Diagnosis

We inspect the stack, flue, and venting with camera scans, smoke and draft testing, and photographic documentation to identify the root cause of the failure.

02

Scope and Proposal

We deliver a written repair scope with a fixed proposal within 48 hours, including engineered drawings and permitting support where the repair requires them.

03

Scheduling and Access

We coordinate with building management, arrange scaffold and access for tall exterior stacks, and plan the work around occupied spaces and continuous boiler operation.

04

Repair Execution

Our licensed crews complete the masonry, liner, flue, structural, or draft repair, keeping tenant disruption and system downtime to a minimum.

05

Testing and Documentation

We retest draft and function, issue a certificate of cleanliness and functionality, and register the lifetime warranty on the systems we installed.

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COMPLIANCE

Repairs That Stand Up to Inspection and Audit

VIOLATIONS

Corrected and Documented

Code violation corrections documented to NYC Department of Buildings standards.

CERTIFICATE

Issued After Every Repair

Certificate of cleanliness and functionality issued after every repair.

EVIDENCE

Photographed and Tested

Photographic reporting and test results for insurance and regulatory records.

WHY US

Built for Commercial Property Requirements

Licensed, Insured, and Certified

Technicians with more than 20 years of commercial repair experience.

48 Hour Written Proposals

And same day estimates for urgent repair situations.

24/7 Emergency Service

For boiler shutdowns and other critical venting failures.

Occupied Building Protocols

Repairs planned around occupied spaces and continuous boiler operation to limit downtime.

High Rise Access

Scaffold setups and access capability for tall exterior stacks and high rise repair work.

Contractor Ready

Subcontracting partnerships for GCs and mechanical contractors, with one team from quote through warranty.

WHO WE SERVE

Commercial Properties Across the Five Boroughs and Long Island

We work with property managers, building owners, general contractors, mechanical contractors, and facility engineers on repair projects of every size, from a single boiler flue to a full stack rebuild.

  • Multi family buildings
  • Commercial and office buildings
  • Restaurants and kitchens
  • Hotels and hospitality
  • Industrial buildings
  • Hospitals and institutions
  • Houses of worship
  • Retail and mixed use
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Serving Brooklyn, Manhattan, the Bronx, Queens, Staten Island, and Long Island.

OUR WORK

Recent Commercial Repair Projects

  • Venting and Exhaust Fans

Oil-Fired Generator Chimney Installation

A dedicated stainless steel chimney for an oil-fired generator, routed up the exterior wall and terminated above the roofline.
  • Chimney Rebuild

Complete Chimney Stack Rebuild and Masonry Restoration

A severely deteriorated rooftop chimney stack was dismantled to a sound base and rebuilt in new red brick, with a new crown and a stainless steel cap.
  • Chimney Rebuild

Complete Chimney Rebuild, Before and After

A failing chimney with crumbling mortar, damaged brick and a broken crown, fully dismantled and rebuilt with a new concrete crown, cap and weather-sealed base.
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REVIEWS

What Our Clients Say

5 star rating

Mike S.

Chimney Professionals did a terrific job cleaning my two wood burning fireplaces in a Manhattan brownstone. They came within one day. Their equipment is state of the art, and it was all done in less than 30 minutes. Everything kept spotless. The price was right too.

1 Mar 2026

5 star rating

M. J.

Not only did they answer right away, they had Rod at my door first thing Monday morning and sourced a hard to find part same day when others could not. They beat every other quote I got and had our system back up and running in under an hour.

27 Oct 2025

5 star rating

Bruce S.

The chimney in my 115 year old brick rowhouse had a badly deteriorated terra cotta lining. Michael gave me a fair price, was punctual, and while spending more time than he expected, stuck to the original price. Kudos to Michael for getting a tricky job done.

2 Nov 2025

5 star rating

Jim S.

Mike and his team are phenomenal. Very quick to respond and schedule and then more importantly, absolute professionals. Deep cleaned the chimney and made sure they cleaned any residual dust around the area.

13 Nov 2025

5 star rating

Ryan L.

Our building needed three new liners for each apartment. They did a great job with the removal and new installation. Mike was very easy to work with, and very responsive with any follow ups.

10 Aug 2025

5 star rating

Donna L.

Chimney Professionals were prompt, professional and neat. We would recommend them to anyone looking to get their fireplaces cleaned. A pleasure to work with.

3 Dec 2025

5 star rating

Alan H.

We asked them to inspect our roof and chimney before an upcoming home inspection. They explained every detail clearly, helped us understand what needed fixing, and even assisted with budgeting.

10 Dec 2025

5 star rating

Baktiar M.

Same day service, quick and efficient. Used drones to check the chimney and provided a report. Definitely recommend.

25 Feb 2025

5 star rating

Kara T.

They were able to come out next day and fix our gas fireplace issue. They listened to all of our concerns and addressed any questions we had while thoroughly explaining the work that needed to be done. The price was fair and upfront.

15 Nov 2024

5 star rating

Brandon G.

Mike set up an appointment for the next day to clean our dryer vent. He maintained good communication the whole time. The technician who arrived was professional and did a thorough job. The price was reasonable too.

23 Aug 2025

FAQ

Commercial Repair Questions, Answered

In most cases yes. We plan repairs around continuous boiler operation and occupied spaces, and we schedule any required downtime with building management to keep it as short as possible.

We turn around written proposals within 48 hours, and we offer same day estimates and 24/7 emergency response for boiler shutdowns and other critical failures.

Yes. We correct venting violations to NYC Department of Buildings and mechanical and fuel gas code standards and provide the documentation to clear the violation and satisfy inspectors.

You receive a certificate of cleanliness and functionality, photographic reporting, and test results suitable for insurance, regulatory, and building records.

Yes. We partner with general contractors and mechanical contractors on commercial repair projects and can complete masonry, liner, flue, and draft repairs to your specifications.

We use camera scans, smoke and draft testing, and photographic documentation to find the actual point of failure before we scope the repair, so the fix addresses the cause and not just the symptom.

Get Your Commercial Chimney Repair Scoped and Scheduled

Tell us about the building and the problem, and we will return a written proposal within 48 hours, with 24/7 emergency service available now.

Schedule a Free Consultation Or Call Now: 646-401-3121

MANUFACTURING

We Make the Parts Your Repair Needs

  • Stainless Steel Pipes
  • Chimney Liners
  • Custom Caps
  • Chase Covers
  • Tees, Wyes, and Elbows
  • Adapters and Reducers
  • Flue Pipes
  • Custom Fabrication
See Our Manufacturing

No waiting on a distributor to fill an odd size

Because we manufacture our own UL Listed stainless steel liners, flue pipe, and custom components, a commercial repair is never held up waiting on a distributor. One team handles the repair end to end, matching parts to your existing system and completing the work on our schedule.

What that means for your project

  • UL Listed stainless steel parts fabricated to your existing dimensions
  • Custom components on demand with no off the shelf sizing limits
  • No supplier delays and no third party markup on repair parts
  • Lifetime warranty on the parts we make, registered on completion