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Window Film

by Lori Greene, DAHC/CDC, CCPR, FDAI, FDHI, on Apr 2, 2021 1:00:00 AM

Q: Is it permissible to place window film over rated glass assemblies on fire-rated doors, so you cannot look through them? If so, does the film also needed to be of a rated material or is there such a thing?

A: I don’t know of a film that has been listed to UL 10C for use on existing glazing in fire doors.  That doesn’t mean one doesn’t exist, but I couldn’t find one in the UL directory.  There are definitely fire-rated films, but they are used in the manufacturing of glazing and not applied in the field.  I checked with Technical Glass Products and they did not know of a field-applied film that is listed for use on fire-protection-rated glazing or fire-resistance-rated glazing. If you have a particular product in mind, you could ask the manufacturer about their listings and approvals.

The bottom line: The film would have to be listed for use on a fire-rated door assembly.

Topics:Fire Doors

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