Fire-rated doors are one of the few places in a commercial building where a sign installer can create a code violation with a roll of vinyl and a squeegee. The door, its frame, its hardware, and its label are a tested assembly, and NFPA 80 limits what can be attached to it. Here is what the standard allows, what changed in the newest editions, and how we handle signage on rated doors in Denver.
First, Confirm the Door Is Rated
Look for the label. Rated doors carry a metal or embossed label on the hinge edge or the top edge of the door, and the frame carries its own. The label lists the rating in minutes (20, 45, 60, 90, or 180), the listing agency (UL and Intertek/Warnock Hersey are the common ones), and the manufacturer. Rated doors are typically found at stairwells and exit enclosures, corridor doors in hotels, apartments, and healthcare, doors between tenant spaces and rated corridors, mechanical, electrical, and storage rooms, garage-to-building doors, and elevator lobbies.
If the label is painted over or missing, treat the door as rated until building management or the door schedule says otherwise. A missing or illegible label is itself a deficiency the building will have to resolve.
The NFPA 80 Signage Rules
NFPA 80, Standard for Fire Doors and Other Opening Protectives, is the document the building code points to for fire door assemblies. Every edition since 2007 has addressed signage, and the rules are short:
- Attachment. Through the 2019 edition, signs must be attached with adhesive. Screws, nails, rivets, and any other mechanical fastener are prohibited. Drilling into a rated door can void its listing.
- Total area. The combined area of all signs on a door face may not exceed 5 percent of the area of that face.
- No signs on glass. Nothing goes on the vision lite or any other glazing in the door. The 2016 and 2019 editions carry one narrow exception for code-required signage on fire-resistance-rated glazing; unless the fire marshal has signed off on exactly that, treat door glass as off limits.
- No interference. Signs cannot impair the operation of the door. The closer, latch, coordinator, gasketing, and meeting edges all have to work exactly as they did before.
- The label stays visible. NFPA 80 requires labels to remain legible. Covering a label with vinyl or paint is a deficiency, and relabeling a door means hiring a field labeling service.
What 5 Percent Looks Like
A standard 3 foot by 7 foot door has a face of 3,024 square inches, so the signage budget on that face is about 151 square inches. That covers one 12 by 12 inch sign (144 square inches) or one letter-size sign (93.5 square inches) with a little room to spare. It does not cover two letter-size signs (187), an 11 by 17 (187), or anything approaching a door wrap. On a pair of doors, each leaf is figured on its own.
| Door size | Face area | 5 percent budget |
|---|---|---|
| 2 ft 8 in by 6 ft 8 in | 2,560 sq in | 128 sq in |
| 3 ft 0 in by 7 ft 0 in | 3,024 sq in | 151 sq in |
| 3 ft 0 in by 8 ft 0 in | 3,456 sq in | 173 sq in |
| 4 ft 0 in by 7 ft 0 in | 4,032 sq in | 202 sq in |
What Changed in the 2022 and 2025 Editions
The 2022 edition of NFPA 80 loosened the attachment rule and refined the area rule, and the 2025 edition tightened the fastener specifications:
- Screws, within limits. Metal signs may be attached with up to four steel or stainless steel sheet-metal screws, size #8 or smaller, that penetrate only one face of the door. The 2025 edition adds a maximum length of 1/2 inch and limits the allowance to hollow metal doors and 20-minute wood doors. Adhesive remains the rule for everything else unless the door manufacturer's instructions say otherwise.
- The 5 percent cap is now material-specific. It applies to combustible signs and to vinyl up to 0.008 inch (8 mil) thick, which covers essentially all printed and cut vinyl.
- Painted or stenciled signage has no size limit.
- Metal signs up to 20 gauge may occupy up to 200 square inches.
- Glazing is off limits, with no exceptions.
These rules only apply where the adopted code references the 2022 or 2025 edition. In most of Colorado, it does not yet.
Which Edition Applies in Denver
Denver's current Building and Fire Code (the 2022 edition, effective May 1, 2023) is based on the 2021 International Building and Fire Codes, which reference the 2019 edition of NFPA 80. In practice that means the older rules apply: adhesive only, 5 percent of the face, nothing on glass. Denver has started its next code adoption cycle, and jurisdictions that move to the 2024 International codes will pick up the 2022 edition of NFPA 80 with it.
Healthcare is stricter for longer. Hospitals, surgery centers, and nursing facilities that answer to CMS follow the 2012 Life Safety Code, which references the 2010 edition of NFPA 80, so their doors are held to the adhesive-only, 5 percent rule regardless of what the city adopts. In every case, the fire marshal (the authority having jurisdiction) has the final word on anything unusual, and it is worth asking before the vinyl is printed rather than after.
What This Means for Common Requests
- Room numbers, suite IDs, and "Fire Door, Keep Closed" decals. Fine. Adhesive vinyl or an adhesive-mounted plaque, sized inside the 5 percent budget, placed clear of hardware, glazing, and the label.
- ADA room signs. The ADA Standards already want tactile signs on the wall at the latch side of the door, not on the door, so the wall is the right place. The one ADA exception that allows a sign on the door (the push side of a door with a closer and no hold-open) still has to satisfy NFPA 80: adhesive, and inside 5 percent. Our ADA mounting guide covers the placement rules.
- Full door wraps and large branding. Not on a rated door. A printed graphic covering the face is many times the limit, and on a door with a vision lite it would also cover glass. Put the branding on the adjacent wall, or ask the door manufacturer about a listed decorative laminate or a factory-finished replacement leaf.
- Stairwell identification and egress signage. These are code-required and usually mounted on the wall beside the door. Where a jurisdiction wants them on the door itself, the same attachment and area rules apply.
- Elevator hoistway doors. A separate category governed by the elevator code and the elevator inspector. Vinyl elevator door wraps are common in commercial buildings, but get the building's elevator contractor to sign off before wrapping them.
How We Install on Rated Doors
- Photograph the label and record the rating before anything goes on the door.
- Measure the face and calculate the 5 percent budget for that leaf.
- Use adhesive-backed materials only, unless the fire marshal has approved fasteners under the 2022 or 2025 rules in writing.
- Keep every sign clear of the label, the glazing, the door edges, the closer arm path, the gasketing, and the hardware.
- Confirm the door still closes and latches on its own from any open position.
- Give the facility a photo and a short note for its fire door inspection file. NFPA 80 requires fire door assemblies to be inspected annually, and inspectors check signage.
Quick Answers
Can I put vinyl lettering on a fire-rated door? Yes, with adhesive, inside 5 percent of the face, off the glass and off the label.
Can a fire door be painted? Yes. Paint the door, not the label, and keep paint off the gasketing and the edges where the door meets the frame.
Who enforces this? The Denver Fire Department during inspections, and the annual NFPA 80 inspection the building is required to keep on file. In healthcare, CMS surveyors and accreditation inspectors.
What if a previous tenant screwed a sign to the door? The holes have to be repaired using a method the standard allows, and the door may need to be evaluated by a fire door contractor. We will flag it, but it is not a sign shop fix.
Sources: NFPA 80, Standard for Fire Doors and Other Opening Protectives; Allegion's summary of the 2022 signage changes; the 2022 Denver Building and Fire Code. This article is general guidance for planning sign installations, not a code interpretation for a specific building; confirm with the authority having jurisdiction.