Mount an ADA sign 1 inch too low, and you’re ripping it off the wall and reordering. The mounting height requirement is strict: 48 inches to 60 inches above finished floor, on the latch side of the door. Measure from the finished floor — not the subfloor, not the old flooring. One measurement mistake costs hundreds in rework.
Mounting height is the easiest requirement to understand and the most common one installers get wrong. Let’s fix that.
The Rule: 48″ to 60″ Above Finished Floor
ADA Standards §703.4.1 is crystal clear: Tactile characters on signs shall be located 48 inches minimum above the finish floor, and 60 inches maximum, measured from the baseline of the characters.
Translation: The bottom of your lowest text line must be at least 48″ from the floor. The top of your highest text line must be no more than 60″.
Sweet spot: Most signs are mounted at 54″-56″ from floor to center. This works for both standing adults and wheelchair users.
Where on the Wall?
The sign goes on the latch side of the door. Not the push side. Not above the door. Not on the door itself.
Single Door
Sign goes on the latch side (where the handle is) of the door.
Double Doors
If both doors are active: sign goes to the right of the right-hand door. If only one door is active: sign goes on the latch side of the active door.
No Wall Space on Latch Side
Mount on the nearest adjacent wall. Same height rules apply.
5 Common Mounting Mistakes
1. Mounting Above the Door — ADA signs go on the wall next to the door, 48″-60″ AFF. Above the door is for exit signs, not room identification.
2. Mounting on the Push Side — The sign must be visible from the approach direction, before you enter.
3. Mounting at Eye Level (60″+) — “Eye level” for a standing adult is 60″-66″. That’s too high for wheelchair users and exceeds the 60″ maximum.
4. Mounting on the Door — ADA room signs cannot be on the door itself.
5. Ignoring Floor Finish — Measure from finished floor (carpet, tile), not subfloor. Carpet adds ½”-¾”.
Pro Tips from 30 Years
- Carpet adds ½”-¾” — always measure from finished floor
- Use mounting templates — we provide them free with every order
- Install after painting — paint splatters on ADA signs = sloppy project
- Measure twice, drill once — re-drilling looks unprofessional
- Check local codes — some jurisdictions (California, NYC) have stricter requirements
Frequently Asked Questions
Q: Is 48″ from the floor to the top or bottom of the sign?
A: Bottom. The baseline of the lowest tactile character must be at least 48″ above the floor.
Q: Does carpet height count?
A: Yes. “Finished floor” means the final surface — carpet, tile, hardwood.
Q: Can I mount a sign higher than 60″ if the building owner requests it?
A: No. 60″ is the federal maximum.
Need ADA signs with included mounting templates? Get a Free Quote → Every Graphics 22 order comes with precise mounting templates. Call (412) 422-1125.
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- ADA Room Signs: Everything You Need to Know
- 10 ADA Sign Mistakes That Fail Inspection
- ADA Braille Signs: Grade 2 Specs
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