ADA & Wayfinding
ADA sign mounting heights and specs, explained.
6 min read
ADA signage is where good intentions meet exact numbers. A sign can have correct Braille, correct contrast, and the right pictogram and still fail inspection because it was mounted at the wrong height or on the wrong side of the door. The specifications that trip installers most are mounting height and door-side placement, so those are worth getting precisely right.
Mounting height: measure to the tactile characters
For signs identifying a permanent room or space, the rule is measured to the characters, not to the sign. Tactile characters must sit between 48 inches minimum (measured to the baseline of the lowest tactile character) and 60 inches maximum (measured to the baseline of the highest tactile character) above the finished floor. Reading the height off the edge of the sign instead of the characters is one of the most common ways a correctly-made sign ends up non-compliant on the wall.
Latch-side placement
Room-identification signs go on the latch side of the door so a person can stand outside the door swing to read them. Where there's no wall space on the latch side — a double door, or a door tight to a corner — the sign moves to the nearest adjacent wall. The intent is simple: someone reading tactile characters by touch should be able to do it without standing in the path of the door.
What makes characters readable
Permanent-room signage uses raised (tactile) characters paired with Grade 2 Braille. Characters are sans-serif, non-italic, and carry specific height and stroke proportions, with a non-glare finish and high contrast between characters and their background (light-on-dark or dark-on-light). Pictograms, where used, sit in a field with the tactile text below it, not inside the pictogram field.
- Raised characters: sans-serif, uppercase, non-glare finish.
- Grade 2 Braille positioned below the corresponding text.
- High visual contrast between characters and background.
- Pictogram (if used) in its own field with text beneath it.
Why the details are worth the discipline
On a single lobby sign, these specifics are easy. On a hospital campus or a multi-site rollout, the risk is drift: a crew that mounts to the sign edge instead of the characters, or to the hinge side instead of the latch side, can repeat the same small error across dozens of doors before anyone catches it. Photo QA against the spec — measured to the characters, photographed from the same angle — is what keeps site five and site fifty identical.
Questions people ask
What is the ADA mounting height for room signs?
Tactile characters must be between 48 inches (to the baseline of the lowest tactile character) and 60 inches (to the baseline of the highest tactile character) above the finished floor. The measurement is taken to the characters, not to the top or bottom edge of the sign.
Which side of the door does an ADA sign go on?
The latch side, so a reader can stand clear of the door swing. If there's no wall space on the latch side (double doors, or a door at a corner), the sign goes on the nearest adjacent wall.