Fire Door Rating
The Cookson Insulated Fire Door is used when an opening in a fire wall requires a door that will reduce energy costs as well as serve as a normal fire door. Approved by international testing laboratory Warnock Hersey, Cookson insulated fire doors have a 4 hour, 3 hour, 1 ½ hour and ¾ hour rating and can be mounted on concrete, masonry, structural steel and structural steel and gypsum board walls.

Insulated Door Properties with a STC Rating
The Cookson Insulated Fire Door utilizes mineral wool fire resistant insulation to provide a R value of 4 and a Flame Spread Index of 10 with smoke developed index of 5. Not only does The Cookson Insulated Fire Door reduce energy costs but it also can serve as a sound barrier. The Cookson Insulated Fire Door has an STC rating of 27.

Weather-stripped Perimeter
The Cookson Insulated Fire Door is furnished with brush weather-seals on the guides and lintel as well as a solid flexible Pyroglass astragal to reduce moisture, air, and dust infiltration.

Easiest Fire Door to Reset
The Cookson Company Insulated Fire Door is the easiest fire door to reset. It is available in both the Simple-Test and Auto-Test model. The Simple-Test Door is offered with chain operation and can be reset after automatically closing by one technician in a matter of minutes. The Auto-Test Door does not require any resetting after automatically closing. It resets itself and is always ready for an alarm activation.

Cookson is the Fire Door Specialist
With innovative Fire Door products since 1938 The Cookson Company’s Insulated Fire Door provides reliability and durability. Due to simplicity of design, Cookson’s Fire Doors offer dependable automatic closings when activated during a test or in an emergency situation. Cookson Fire Doors will last for years, even when tested frequently. Reliable fire doors that last for years makes The Cookson Insulated Fire Door the best value available.