Protecting lives and property across New York City with certified firestopping, intumescent fireproofing, and repair solutions. Code-compliant. Reliable. Done right.
Firestopping is Ali Firestop's core specialty — and the most critical passive fire protection measure in any New York City building. We seal penetrations and joints in fire-rated assemblies to prevent the spread of fire, smoke, and toxic gases.
Our certified installers use UL-listed firestopping systems from the industry's most trusted manufacturers, ensuring every installation meets NYC Building Code requirements and passes inspection.
Damaged, missing, or disturbed spray-applied fireproofing is a code violation — and a failed inspection waiting to happen. Ali Firestop provides professional patching and repair of SFRM (Spray-Applied Fire Resistive Material) across New York City.
Whether fireproofing has been damaged by construction activity, water intrusion, or mechanical impact, our team identifies the correct material, matches the existing system, and restores compliance quickly and efficiently.
For architecturally exposed structural steel, intumescent fireproofing delivers the same fire protection as traditional spray systems — with a smooth, architectural finish. Ali Firestop applies intumescent coatings in any color, achieving 1, 2, and 3-hour fire ratings.
Intumescent coatings are the premium choice for modern lobbies, open office environments, atriums, industrial lofts, and any space where exposed steel is part of the design intent.
When it comes to passive fire protection, there's no room for shortcuts. Ali Firestop delivers certified, code-compliant work — on schedule, every time.
Fully licensed by New York City with comprehensive insurance coverage. Every project meets NYC Building Code requirements.
We only install UL-listed firestopping and fireproofing systems, documented for DOB filing and special inspection.
Full as-built records, UL system numbers, installer certifications, and product data — ready for your inspection package.
We understand construction schedules. Our crews mobilize quickly and coordinate with other trades to minimize delays.
Manhattan, Brooklyn, Queens, the Bronx, Staten Island — we serve every corner of New York City and the surrounding metro area.
Our meticulous installation process and thorough documentation are designed to achieve inspection approval on the first attempt.
From Manhattan high-rises to Brooklyn warehouses, Ali Firestop provides firestopping and fireproofing solutions for every building type across New York City.
Get quick answers to the most common questions about firestopping, fireproofing, and passive fire protection in New York City.
Trusted by property managers, general contractors, and building owners across New York City.
"Ali Firestop completed a full firestopping inspection and remediation across our 22-story Manhattan office tower. Incredibly professional, zero punch-list items, and they passed NYC DOB inspection first try. Highly recommend."
"We have used Ali Firestop on three separate NYCHA projects. Their team understands the code inside and out. Fast mobilization, clean work, and all documentation was ready before we even asked. Top-tier contractor."
"Our GC brought in Ali Firestop on a tight schedule for a Brooklyn residential high-rise. They coordinated seamlessly with other trades, finished ahead of schedule, and their firestopping passed inspection without a single comment."
"Needed emergency firestopping repairs after a fire inspection flagged multiple penetrations. Ali Firestop responded within hours, assessed the whole building, and had everything corrected and re-inspected within the week. Outstanding service."
"I specify Ali Firestop on every NYC project that needs firestopping work. Their submittals are always complete, their installers are certified, and they never create problems for the other trades. A genuinely reliable partner."
"Used them for intumescent fireproofing on exposed structural steel in a Midtown renovation. The finish quality was excellent — client was very happy. Ali Firestop knows their product options and matched exactly what the architect specified."
Ali Firestop provides firestopping and fireproofing services throughout the New York metropolitan area. No job too large, no borough too far.
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