I have been working with TT material a long time. The Floorizon (T&G) material will stand up and be beautiful if you make sure you install it correctly. Read the Installation Manual on proper installation requirements. If you plan on building your deck close to the ground or enclose it, check first. Floorizon requires at least 12" of un-obstructed airflow on at least three sides of the deck. If you have that great! You will love it! Easy to install and maintain. As far as mold and mildew, Corte-Clean is the best cleaner out there thus far! It is also Environmentally safe! Check out their website. Awesome before and after photos.