Re: Nyloboard? Anyone use it?
There are some "plastic boards" that can work for some applications, but I don't count TREX as one of them. It's made from recycled junk plastic, plastic that was never formulated to be used outside and exposed to high heat and low temperatures, let alone UV rays. Then they add junk wood into the mix, just the product you're trying to eliminate.
What you end up with is a low strength, high cost and flimsy, heat, UV and water sensitive product that will develop mold and change shape. It is then wrapped in the "green" recycled marketing to make people feel better about it.
I did a great deal of research on this type of decking before I built mine. Friends that have TREX report all sorts of issues, so far the fake wood I purchased has performed better than expected and I have no complaints.