Non-metal building products, namely, cement and cement products, namely, almina cement, Portland blast-furnace slag cement, silica cement, slag-lime cement, portland cement, cement boards in the nature of cement bonded particle board, wood-fiber reinforced cement boards, pulp-fiber reinforced cement boards, fiber cement boards in the nature of cement bonded particle board, wood-fiber reinforced cement boards, pulp-fiber reinforced cement boards, and cement slabs, all used for cement exterior ...