It often depends on the material used and where the sign is hung.  Our materials range from temporary use - 10 years or more.  If the sign gets a lot of sun, colors (especially oranges and reds) may begin to fade after a few years.  Once you narrow down the type of sign you would like and where it will be displayed, we can recommend materials to best suit your needs as well as provide a more definite time span for the life of your sign.