It is often the case that attaching a sign is a more complicated deal than printing it. Here’s a great way to attach a sign that we like a lot.
The sign material is Ultraboard, which is like foamcore except plastic on either side of the styrofoam instead of paper. We like it because it doesn’t warp with changes in humidity, is durable, and gives us nice crisp colors.
Our customer put screw anchors in the drywall, and then large head screws through the Ultraboard. This gives a nice clean appearance, and holds the sign securely. We have seen people use it for sintra signs outdoors too.