Construction Libraries tend to use a combination of sign construction sources, both in-house and outside the library. Library staff members make signs on an ad hoc basis in 47 libraries, and in two libraries an in-house graphic designer makes the signs. Libraries use a variety of materials for both sign background and lettering. The background material most often used is paper, followed by acrylic, plastic laminate, and mounting board. Other substances used, in rank order of preference, are Plexiglas, metal, and wood-based products.
Some libraries apply lettering directly to the wall surfaces.
And, of course, a large number of libraries generate lettering by computer. Libraries list engraved plastic laminate and vinyl letters on acrylic, plastic, or Plexiglas as the most durable materials for signs. The staff at most libraries walk through the building to decide where signs are needed, but it is interesting to note that many libraries make this decision by incorporating user input as well. Libraries also monitor users' directional questions, allow a committee to decide, or simply respond to library staff requests when making decisions about where to place signs. Libraries combat vandalism by using reverse engraving on signs, placing vinyl letters on the reverse side of Plexiglas, installing Plexiglas over signs, or laminating signs.