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CURTAIN WALL CW-D-1014 Through 1017 Thermafiber® Impasse® No Backer Bar™ Aluminum-Framed Curtain Wall Perimeter Fire Containment System


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The Thermafiber® Impasse® No Backer Bar™ Aluminum-Framed Curtain Wall Perimeter Fire Containment System is a patented perimeter fire containment system. CW-D-1014 will serve any typical building situation with an F-rating of up to two hours.

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Performance Attributes

Key Attributes:

Easy Installation
Fire Containment

ASTM E2307

ASTM E2307 measures the ability of perimeter fire barrier systems to maintain a seal and prevent interior fire spread as the exterior wall assembly deflects and deforms during fire exposure. The ASTM E2307 test exposes the joint to fire from the room of fire origin and the exterior wall to fire from both the interior and the exterior as the fire plume exits the room of fire origin through a window opening. ASTM E 2307 determines the period of time that the perimeter fire containment system will limit flame penetration through the opening between the exterior wall assembly and the floor assembly.

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Easy Installation

The Thermafiber® Impasse® Curtain Wall Insulation System streamlines the installation of curtain wall insulation by changing the order of traditional installation steps to fit a more logical progression.

International Building Code, Section 715.4 Compliant

The 2015 International Building Code (IBC), Section 715.4, requires approved perimeter fire containment systems at the intersection of the non-rated exterior curtain wall and the fire-resistance-rated floor assemblies. Although local codes may vary, generally fire resistance rated floor/ceilting assemblies are required in construction types I-A, I-B, II-A, III-A and V-A.

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NFPA 285 Exempt

NFPA 285 is required in the International Building Code (IBC) in multiple situations. The NFPA 285 test is to determine that combustibles, when exposed to fire on the exterior face of the wall, do not spread flame over the surface or through the core of the otherwise non-combustible wall assembly. This particular assembly is NFPA 285 exempt if built per CW-D-1014 and only includes noncombustible materials.

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UL Fire Resistance Directory

The UL Fire Resistance Directory is a highly recognized document in the fire stopping industry.

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Construction Details including CAD drawing files for the Thermafiber® Aluminum-Framed Perimeter Fire Containment System are available for download below.

CAD Files

Curtain Wall

CW-D-1014 Through 1017

Thermafiber® Impasse® No Backer Bar™ System


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