On Apr 19, 10:31*pm, JIMMIE wrote:
The cornerboards on my house are made of 5/4 X 6 lumber. I have
replaced 3 of them with redwood and have no problem with those but the
rest keep rotting out on me. Redwood is no longer available. Are there
any synthetics that would work. I didnt see anything that Trex had
that would do the job.

Have you thought about Hardie panel? My house is Hardie panel board
and batton with the same for corner boards. If they rot, give
up. ;-)