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Professional Service
Fire Protection Systems
3M™ Fire Barrier Duct Wrap 615+
Diaz Sheet Metal is an authorized provider of 3M™ Fire Barrier Duct Wrap 615+, the industry's premier zero-clearance solution for fire-rated grease and air ducts. This advanced, foil-encapsulated blanket offers a high-performance alternative to traditional gypsum shafts, saving critical space and simplifying code compliance.
Our Services
ASTM E2336 Certified
Tested and rated for 1 or 2-hour fire protection, strictly compliant with ASTM E2336 for commercial kitchen grease ducts.
Zero-Clearance Performance
Allows for installation directly against combustible materials, significantly reducing the required plenum footprint.
High-Temp Containment
Specifically engineered to contain the extreme heat and flame of a internal grease fire, protecting the surrounding structure.
Full System Logistics
We supply the complete UL-listed assembly, including the blanket, stainless steel bands, and 3M™ firestopping sealants.
Why Choose Diaz Sheet Metal?
Space-saving alternative to bulky fire-rated shafts
Easily applied to complex offsets and transitions
Lightweight design reduces structural load requirements
Foil-encapsulated for durability and moisture resistance
Widely accepted by Fire Marshals and Mechanical Inspectors
In-stock and available for rapid site delivery alongside your duct order
Our Process
1
System Evaluation
We determine the required layers and overlap for your specific fire-rating requirements (1 or 2 hour).
2
Quantity Calculation
Precise takeoff of wrap and banding based on your duct dimensions to minimize waste.
3
Material Staging
Complete systems are organized and palletized for immediate field installation.
4
Compliance Support
We provide all necessary UL documentation and submittals for your inspection process.
Frequently Asked Questions
Why use 3M™ Fire Wrap instead of a gypsum shaft?▼
3M™ Fire Barrier Duct Wrap 615+ is significantly thinner and lighter, allowing for 'Zero Clearance' to combustibles. This is crucial in tight ceiling spaces where a traditional 2-hour gypsum shaft simply won't fit.
Is one layer enough for a grease duct?▼
Per ASTM E2336, most grease duct applications require two layers of 3M™ 615+ wrap with specific overlaps to achieve the mandatory 2-hour rating. Air ducts (stairwell pressurization, etc.) often only require a single layer for 1 or 2-hour ratings.
Do you supply the banding and clips?▼
Yes. A compliant installation requires specific stainless steel banding (typically 1/2" width) and clips. We provide the complete 'system' to ensure your installation meets the UL-listing requirements.
Can I use this for dryer exhaust or stairwell pressurization?▼
Yes. 3M™ 615+ is a versatile fire protection solution and is frequently used for dryer exhaust, stairwell pressurization, and hazardous fume exhaust systems to maintain fire-compartmentation integrity.
Ready to Get Started?
Contact us today for a free estimate on your fire protection systems project.