Certified Firestop Systems. Code-Ready Installs.
New England’s Trusted Firestopping Contractor
At Colonial Fireproofing, we specialize in UL-tested, code-compliant firestopping solutions for commercial, industrial, and institutional construction across New Hampshire, Massachusetts, Vermont, and Maine. We help project teams pass inspection the first time without delays, guesswork, or callbacks.
Why Builders Rely on Colonial Fireproofing
Firestopping isn’t an afterthought; it’s a critical path item. That’s why general contractors turn to Colonial Fireproofing for reliable, inspection-ready installs that hold up under pressure.
We work across New England job sites every day, integrating cleanly with mechanical trades and delivering tested systems that match your spec book. We’re not just installers. We’re firestop problem solvers.
Here’s what you get:
- Submittals and UL system selections turned around fast
- Install crews trained to STI and Hilti protocols
- Coordinated fieldwork that aligns with other trades
- AHJ-ready documentation that clears inspections the first time
What Sets Us Apart in Firestopping
Colonial Fireproofing takes a proactive role in your project. We help identify required systems early, catch scope gaps before they become RFIs, and ensure compliance is never a scramble.
Licensed and Certified Across NH, MA, ME, & VT
STI-Certified Instructor on staff
Active NFCA and ABC membership
Detailed, organized project closeouts
Known and trusted by local code officials
Firestopping Services We Offer
Penetration Firestop Installation
Our crews seal around pipes, cables, ducts, and conduits with UL-listed materials to ensure every rated wall or floor performs as designed during a fire event. Every system we install meets the tested criteria for thermal and smoke protection.
Joint and Perimeter Fire Barriers
We handle linear gaps at floor slabs, curtain walls, and head-of-wall joints with precision. Whether you’re sealing slab edges or vertical transitions, we install the correct system with manufacturer-verified methods and exacting attention to detail.
Emergency Firestop Corrections
Unexpected issue before inspection? We’re ready. Our rapid response firestop crews can be on site quickly to address missed scope, unsealed penetrations, patchwork or field changes to minimize downtime and keep your closeout process on track.
New England's Commercial Firestopping Contractor
Commercial firestopping is essential to containing fire and smoke, maintaining building safety, and meeting code. Penetrations from plumbing, electrical, and HVAC systems compromise rated assemblies if not properly sealed. Firestopping restores these barriers and helps protect lives, property, and critical infrastructure. Colonial Fireproofing installs tested, UL-listed firestop systems that meet jurisdictional codes and stand up to inspection. Whether it’s new construction or remediation, we help safeguard your project with certified solutions.
Professional firestopping isn’t just about plugging gaps; it’s about ensuring integrity across the entire fire-rated assembly. From through-penetrations to edge-of-slab joints, we apply code-driven systems that control fire spread and maintain life safety during an emergency. All work is performed by trained firestop technicians who understand UL classifications, tested system compatibility, and inspection protocols. Done right, firestopping supports safe egress, minimizes property loss, and protects structural and operational continuity.
Professional Firestopping Company in New England
Fire behaves unpredictably. When a building has compromised fire barriers, flames and smoke can spread rapidly through floors and walls. Firestopping addresses these weak points. At Colonial Fireproofing, we apply advanced sealants, wraps, and firestop devices to preserve rated assemblies. Our job is to make sure every joint, sleeve, and conduit opening is properly protected—before the inspector arrives.
We understand how to coordinate across MEP trades, maintain UL compliance, and adapt to shifting project needs. From hospitals and high-rises to schools and logistics centers, our installations support code approval and real-world safety. Let Colonial Fireproofing reinforce your structure with firestop assemblies that perform under pressure.
Firestopping Near Me
When the question is “Where can I find a reliable firestopping company near me?” — the answer is Colonial Fireproofing. We service commercial projects throughout New Hampshire, Massachusetts, Vermont, and Southern Maine with a focus on detail, accuracy, and code adherence.
We partner with general contractors, engineers, and facility teams to ensure every penetration and joint is sealed right the first time. Our responsive crews, certified methods, and thorough documentation make us the firestopping contractor teams trust to deliver protection and pass inspections. Contact us today to schedule a consultation or emergency site visit.
Firestopping is just as essential in environments like hospitals, factories, or schools, where safe evacuation and fire containment are critical. Passive fire protection slows the spread, giving first responders time and occupants a chance to exit safely. Our UL-rated materials help prevent catastrophic failure and buy valuable time. At Colonial Fireproofing, we specialize in commercial and residential solutions that meet code and pass inspection. If you’re searching for a trusted “firestopping company near me,” we’re ready to help. Contact us today for a free quote and see how we protect your people, property, and reputation—one project at a time.
Licensed, Certified, Trusted
Your Firestopping Experts in New England
Wentworth Community Housing
Fireproofing Project in
Hartford, VT
Grove Street
Fireproofing Project in
Worcester, MA
RiverWoods Exeter
Fireproofing Project in
Exeter, NH
Need Firestopping on an Active Project?
Whether you’re breaking ground or closing out a floor, Colonial Fireproofing is ready to help. Our team works fast, clean, and code-compliant to bring your passive fire protection up to spec with zero compromise.