What's the trick to installing fire-wrap (Zero Clearance insulation) on grease duct

Plain-English answer

Foil-faced fire wrap must be installed in a two-layer system with staggered joints.

Cut the blanket wrap so it tightly hugs the duct profiles, and create a minimum 3-inch perimeter overlap at all sheet edges. Secure the heavy wrap tightly to the metal using stainless steel banding straps spaced every 10 to 12 inches, or use heavy-duty stainless steel weld pins.

Field checklist

• Stop and verify the approved detail, manufacturer instructions, foreman direction, and project specs before touching it.
• Foil-faced fire wrap must be installed in a two-layer system with staggered joints.
• Cut the blanket wrap so it tightly hugs the duct profiles, and create a minimum 3-inch perimeter overlap at all sheet edges. Secure the heavy wrap tightly to the metal using stainless...

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Use this as training guidance. The foreman, approved drawings, project specs, manufacturer installation instructions, employer safety policy, and AHJ/code requirements always control the final answer.

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