On Thu, 25 Jun 2015 13:38:01 -0700 (PDT), herb white
The PVC will get brittle but it is not going to crumble to dust. There
are PVC arbors around here that have been in the Florida sun for 20
years or more. As long as you are not trying to bend it, you will be
If you used the gray "electrical" PVC it will be OK for decades.
Like the others have said a coat or two of paint will reduce the UV