Signs, Labels and Address Numbers

Choosing a sign by where it is read

Start with the viewing distance. A common guide is one inch of letter height for every 10 feet the reader stands away, so a sign read from 30 feet needs letters about 3 inches tall. Indoor signs can be thin plastic or adhesive vinyl, while outdoor signs need aluminum or UV-resistant rigid plastic that will not fade or warp. Parking and regulatory signs are sold at set sizes, such as 18 x 12 inches, and are meant to be post-mounted or bolted through holes.

Restroom signs have extra requirements in public buildings. Room identification signs under the US accessibility rules need raised characters with Braille, a non-glare finish, and mounting on the latch side of the door, with the characters roughly 48 to 60 inches above the floor. Titles that mention ADA describe a sign intended to meet those rules, though exact placement is your responsibility. Standalone A-frame boards need a stable base and a wide enough stance for wind.

Labels, laminating sheets and address numbers

Letter and number label kits list character height, such as 1-1/2 inch, and the surface they stick to; clean, smooth, dry surfaces hold best. Outdoor address numbers should be metal or UV-resistant plastic with a contrasting color and fixings suited to the wall. Laminating sheets are rated by thickness in mils, where thicker pouches are stiffer and more protective, and by size, such as a pouch for a letter sheet. Titles in this department are mixed, so confirm that the item is a sign, label or number before comparing sizes.

Questions about Signs, Labels and Address Numbers

Which sign material lasts outdoors?

Aluminum with UV-resistant inks or sheeting lasts longest and does not rust. Rigid plastics suit sheltered spots, and adhesive vinyl on a smooth backing works for short-term use. Faded color or curling edges mean the material is not rated for sun.

Can I laminate a sign for outdoor use?

Laminating protects paper from splashes and handling but not from sun, wind and constant moisture. Heavy pouches or sealed covers help short-term, while a printed aluminum or plastic sign is better for permanent outdoor use.

How do I mount a sign on glass or a door?

Clean the surface with alcohol, press adhesive-backed signs firmly for a minute, and avoid textured or freshly painted surfaces. For heavier signs, use screws or double-sided foam tape rated for the weight.