• A red-painted wall features a closed metal concession window with a fire rated rolling door and a large closed rolling door, all set in an indoor space with a light blue floor and beige ceiling tiles.

Fire-Rated Insulated Rolling Service Door - 635

The FireKing® Insulated Fire-Rated Doors Model 635

Model 635

Wide array of rolling steel doors to demanding fire-safety standards and discerning aesthetic requirements.

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Overview of the Fire-Rated Insulated Rolling Service Door

Our insulated fire-rated ro​​lling service door offers superior protection wherever a listed insulated fire door is required (max. width 24’; max. height 24’). The Model 635 insulated rolling steel door serves as a thermal barrier, ideal for applications which require separation due to climate control requirements. The insulation used in this door offers added energy efficiency (R-value of 4.5), sound transmission control (STC 21), and the mi​neral wool utilized in the slat insert meets the Smoke and Flame Index of 5.

Common masonry and non-masonry mounted applications include: facilities with paint booths, file rooms, material storage locations, warehouses, shared walls between businesses, public record storage, and public buildings such as libraries. The Model 635 insulated fire door is available with UL (FM optional) labels for 1-1/2, 3, 4 and oversized doors.

These doors feature a mechanical auto resettable hoist (non-motorized) that enables easy drop test and reset of the fire door in just seconds. Fusible links are mounted on both sides of the wall that separate to automatically close the door in case of fire. Additional safety and protection features are available, including: Fire Sentinel​®​ time-delay release device, FireLite® vision lites, smoke detectors, horns and strobes.

A simple black and white line drawing of a bicycle, shown from the side. The illustration clearly displays the wheels, frame, handlebars, seat, pedals, and chain.

Wide array of 
stained and painted finishes

A person sits cross-legged on the floor meditating, with hands resting on their knees. A large clock is behind them, symbolizing mindfulness and taking time to meditate. The background is blank.

Wood-grain
texture

A stick figure sitting at a desk raises its arms in frustration while looking at a computer monitor, with a slanted desk lamp overhead.

Customize with windows and hardware

A person in a wheelchair is depicted ascending a flight of stairs using a stair lift, illustrating accessibility solutions for individuals with mobility impairments.

Superior thermal performance

A black cat sits on a windowsill, looking outside. Sunlight streams through the window, casting a warm glow on the cat’s fur and the surrounding area. Lush green trees can be seen outside the window.

Superior 
durability

A silhouette of a person with their head resting on their hand, appearing thoughtful or contemplative.

Wind load options
upon request

Construction

Product Specifications

R Value:4.5
Material:Steel
Max Width:24’0″ (7315 mm)

*U-factor values are independently tested and verified per ANSI/DASMA 105.
**Overhead Door™ Brand uses a calculated door section R-value for our insulated doors.

Get inspired

Explore our photo galleries to get inspired for your new residential or commercial door.

SEE GALLERY
View through large windows of a fire station showing several red fire trucks parked in a well-lit garage, with equipment and tools visible in the background.
A modern building with large glass garage doors labeled SERVICE above the entrance, likely a service center or auto repair shop, with a paved sidewalk in front.
Interior of an industrial facility with metal tracks running down the center, surrounded by machinery, tools, and workbenches. A large yellow crane is mounted overhead, and the space is brightly lit with high ceilings.
A suburban house with a decorative double garage door, surrounded by landscaped bushes, colorful flowers, and trimmed shrubs. The driveway is paved, and the house features tan siding with brick accents.
A modern house exterior with stone walls, a wooden garage door featuring rectangular windows, a balcony with a metal railing, and stairs on either side leading to the entrance.
Modern house with stone and wood siding, large windows, two gray garage doors, and a spacious driveway under a partly cloudy sky.
Modern white two-story house with black-framed windows, wooden accents, and a metal roof. There is a three-car garage with glass doors and a landscaped front yard with small trees and bushes under a clear blue sky.
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