Sorry for the mess Ebb.

Most all the manmade outside material has problems now and then. X 10000 with trex.

Over the years seeing this I have come up with some ideas why.

A bad batch,something happened with quality control.

A bad install resulting in major stress the product could not handle. In other words the Contractor made a mistake.

The weather expousure reacted with both of these ideas and multiplied the problem.

The stuff was total junk to begin with like trex.

Azek has a pretty good rep,a lot of folks are real happy with it,and they have a not bad customer service record but if the fine print says no labor thats pretty much what it means.

Hang in there, while dealing with them keep in mind sometimes its good to mix a little sugar in with the vinegar. J.

ebbs1939
I know this is an old post but was browsing. What was the final outcome?