Its been a long time since I've posted. I still have perpetual maintenance with the Timbertech deck, and still regret building with it due to mold problems. I do not have trouble with rot or splinters, though, as some other composite owners have complained. If I can find the "magic" cleaner and protector at an economical price, I would not be so angry about this, still.
My routine the past two years is to keep it free of debris once a week with the leaf blower. In the early spring and in the fall, when it is too cold to use PSC cleaner/protector, I clean it with Dawn dish soap and clorox, diluted. It looks OK for a few weeks.
Around June or July when I see there will be several dry days in a row, I use the very expensive stuff. PCS deck cleaner and restorer. It takes one day of cleaning, another day to dry, and then I apply the Restorer to make the deck more waterproof. This seems to prolong the time between reappearance of mold black spots. Then in November, before the snow flies, I clean the deck again with Dawn and Clorox. After a long winter, it always looks very dirty, and I like to get it clean as soon as we can. Neither Corte-Clean, nor PCS can be used when it is still under 60 degrees.
I am tired of spending all this money and effort on a "low maintenance" deck. I bought some Corte-Clean online, could not find it at local retailers. I am going to try this product this spring as it has had good reviews. I'm thinking that it would still be wise to recoat it with protector after Corte- Cleaning it to keep water out.
If you are thinking about installing a composite deck, I would discourage it. If I had to do it over again, I would have gotten a few boards, put them outside for a season, to test them for quality. If I had done this, I would have seen the utter failure of Timbertech to maintain a decent appearance. If anyone hears of a class action suit against this company, it would be a responsible thing to join.
I don't have any experience with the newer lines of Timbertech, and wonder if they have been improving it due to complaints. Our building contractor refuses to use it any longer