Licensed firestopping and fireproofing services across Long Island — Nassau and Suffolk counties.
Ali Firestop provides comprehensive firestopping and fireproofing services throughout Long Island. Our certified installers use UL-listed systems from leading manufacturers, ensuring every installation meets NYC Building Code and passes DOB inspection — first time, every time.
Sealing pipes, conduits, cables, and HVAC penetrations through fire-rated walls and floors with UL-listed systems.
Head-of-wall, perimeter, construction joint, and expansion joint firestopping systems for complete code compliance.
Remediation of failed, missing, or damaged firestopping in existing buildings — including post-inspection correction work.
Exposed structural steel protection with thin-film intumescent coatings — aesthetically clean and fully rated.
Spray-applied fire-resistive material for steel and concrete structures in Long Island buildings.
Full documentation packages — photos, product data sheets, certifications — ready for NYC Buildings Department filing.
Fully licensed by the NYC Department of Buildings.
FIRESTOP certified team with manufacturer training.
3M, Hilti, Specified Air Solutions, STI products.
Ready for DOB filing and insurance compliance.
Emergency response available 24/7 in Long Island.
No-obligation quotes for all Long Island projects.
