Vinyl is virtually maintenance free. In the over 20 years we have been installing vinyl fence we have received few warranty claims. Actually, the only material warranty claim we have received was almost 20 years ago on an order of Tan post caps.
The manufacturer had an error in its injection molding process and sent us new caps within 5 days. There are many materials available today that tout themselves as Maintenance Free or Lifetime Warranty. Look at the pictures below and you will see that not all materials are Maintenance Free!