No two flags receive identical wear. Many factors have to be taken into consideration such as the location of the flag, the environment, and to what extent preventive maintenance measures are used. Proper maintenance of your flag will help to prolong the flag life. Avoid flying your flag in the rain.
Wind combined with additional water weight puts undue strain on the fabric and stitching.
Prevent mildew by letting your flag dry thoroughly before storing it. The fly end of the flag historically will be the first to reveal wind wear. When this begins, you may trim off the old hem and rehem flag. Do this at the first sign of fraying, don't wait for your flag to be blown to shreds. Beware of abrasion from a rough flag pole or other nearby surface.