I have an older pressure treated fence around a pool and the top plate
(2 x 6 with a 2 x 4 at 90 degrees) is in need of replacement. Thinking
of using Trex (or a similar substitute) in lieu of pressure treated and
eventually replacing all the fence with the same material. Does anyone
have first hand experience with trex in horizontal applications?
Particularly interested in knowing of mildew problems, color stability,
shrinkage and eventually slipperiness.

Thanks.