Non-metal building materials, namely, [ non-metal posts, ] boards, [ handrails, ] planks, [ pickets, post caps, post base collars and end caps for affixing to the exposed ends of boards, ] all composed primarily of plastic and cellulose, for use in constructing decks, porches, patios, [ fences, ] pool and hot tub surrounds, walkways, docks, and boat slips