Hello - I've had the same mold problems with Trex, it began six months after installing. I've called Trex, submitted a claim, & pictures. I did receive a a "goodwill offer" for settlement of $350 to have it professionally cleaned. Terms of accepting the offer, I'm not supposed to talk about the settlement or say anything negative about Trex; guess I've blown that.

So - It's my understanding this stuff can be painted or stained. If I do will the mold continue to bleed through? Makes me sick to see it.