Flag manufacturers do not warranty flags with a “life expectancy” because weather conditions are constantly changing.
In general, a nylon flag will last approximately 90 days based on daily display from sunrise to sunset, but not during periods of inclement weather. In some cases a nylon flag displayed 24 hours-a-day may last only 1/4 as long as a flag flown during daylight hours.
Mother Nature is the worst enemy of every outdoor flag. Be certain your flag is made from an all weather flag fabric such as nylon or polyester. Then examine the construction features. All hems should be turned back twice and secured with 2 rows of lock stitching and 4 rows of lock stitching on the fly end.
Even all weather flags made of nylon or polyester fabric will sustain damage in extreme weather conditions. Sun, rain, wind, ice and snow all weaken fabrics and threads. When your flag begins to show obvious signs of wear such as holes, severe fading or tattered stripes it is appropriate to retire the old flag and replace it with a new one.
To extend flag life, flag repair is okay. Repair requires trimming off the tattered or frayed end and sewing a new hem resembling the original hem with nylon or polyester thread. It is proper to repeat this repair sequence until the flag is nearly square. If the stripes on an American flag will not be longer than the blue field when the repair is complete the flag should be retired. Keep in mind repair flags will not last as long as the flag did when it was new because the flag fabric has already started to deteriorate.
Nylon is the fabric of choice for display on house mounted flagpoles and residential flagpoles up to 500mm.
Our commercial customers prefer polyester flags over nylon.