Patching & Repair Fireproofing in New York City
Spray-applied fireproofing — commonly known as SFRM (Spray-Applied Fire Resistive Material) — is applied to structural steel, concrete, and other building elements to provide fire resistance. Over time, or as a result of construction, renovation, or mechanical damage, this fireproofing can become damaged, missing, or disturbed.
Ali Firestop specializes in the patching, repair, and restoration of spray-applied fireproofing in New York City commercial, residential, and industrial buildings. Our team matches existing materials, applies fireproofing to the correct thickness, and ensures compliance with NYC Building Code and applicable fire resistance ratings.
When Is Fireproofing Repair Needed?
Spray-applied fireproofing repair is needed in a wide range of situations:
- Construction Damage — Fireproofing disturbed or removed by MEP trades, drywall installation, or other construction activities
- Renovation Work — Existing fireproofing damaged during building renovations or tenant improvements
- Mechanical Damage — Impact damage from vehicles, equipment, or maintenance activities in parking structures and industrial facilities
- Water Damage — Fireproofing that has been saturated or displaced by water intrusion
- Failed Inspections — Repair of deficiencies identified by DOB inspectors or Special Inspectors
- Pre-Sale Compliance — Restoration for building sales, refinancing, or certificate of occupancy
Our Repair Process
1. Assessment & Thickness Testing
Our team conducts a thorough assessment of existing fireproofing conditions, including thickness testing using calibrated probes to determine where repair is needed and the extent of work required.
2. Material Matching
We identify the existing SFRM product and match it for repair work. We work with all major fireproofing products including W.R. Grace, Isolatek International, and similar products to ensure a consistent, compliant repair.
3. Surface Preparation
Damaged or loose fireproofing is removed, and surfaces are prepared for new material application per manufacturer specifications and UL system requirements.
4. Application
New fireproofing is applied to the required thickness as specified by the applicable UL system or project engineer. We apply to both steel framing and concrete substrates.
5. Documentation
After repair work is complete, we provide documentation including thickness test results, materials data sheets, and installer certification for your inspection records.
Structures We Repair
- Structural steel beams and columns
- Steel deck and floor assemblies
- Concrete columns and beams
- Parking structures and garages
- Mechanical rooms and equipment areas
- Transfer slabs and long-span structures
NYC Building Code Compliance
Fireproofing repair in New York City must comply with the NYC Building Code and the requirements of the original fire resistance rating. Ali Firestop ensures all repair work meets or exceeds the required fire resistance rating and is performed in accordance with the applicable UL design system.