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What are courtesy signs made of?

As with most other signs, plastic courtesy signs are generally more common in indoor spaces, and aluminum is more common outdoors. Plastic signs can be screwed into drywall or other surfaces, or it can be stuck to flat surfaces with adhesive strips. Vinyl signs are generally label-like signs that can be stuck directly to surfaces. Depending on the surface, any adhesive can be difficult to remove if it’s stuck directly to a wall, and should be thought of as permanent.

Aluminum courtesy signs are generally less common because most courtesy signs are intended for indoor use, but occasionally property owners will want to remind drivers to exercise courtesy in parking lots or other outdoor shared spaces, and aluminum is appropriate for such uses. Aluminum courtesy signs can even be made with reflective edges or faces for extra visibility – engineer grade (made by companies like 3M) is a moderately reflective metal surface that maintains visibility without too much glare, while high intensity and diamond grade signs are highly reflective to maximize visibility.

Placed in any common area, courtesy signs provide a gentle reminder to be considerate, and can make the difference between camaraderie and simmering resentment.