Building materials as finished products made of concrete, gypsum, clay, potters' clay, stone, marble, wood, plastics and synthetic materials for building, construction, road construction purposes, included in this class; non-metallic buildings, non-metallic building materials, poles not of metal for power lines, barriers not of metal, natural, synthetic coatings in the form of panels and sheets, being building materials, bitumen cardboard coatings for roofing, bitumen coating for roofing, doo...