Signs using wood as a substrate are still being used, but each year they lose a bit more of their market share. For sheer economy there's always a thin sheet of plywood, but if you're looking for something that's going to last through many years we recommend Nu-edge. It's a plywood-based substrate laminated and completely sealed in vinyl.
In addition to these two basics there are many other wood based substrates such as Masonite, MDO board, redwood, and other hardwoods.
Please contact us for advice and a fast, low quote on your sign. Once the art has been approved we ship or install almost all signs within 2-5 working days.