19 Building and construction materials and elements, not of metal; plastic sheets for roofing; roofing cement; ceramic roofing tiles; clay roofing tiles; stone roofing tiles; cement mortar roofing tiles; glazed ceramic roof tiles; non-metal shingles; roofing slates; slate; roofing fabrics; bitumen containing materials for use in roofing; roof construction materials (non-metallic -); roofing tiles, not of metal; roofing plate (non-metallic -); cladding panels (non-metallic -) for roofs; non-metal roofing panels; tiles of slate; cement mortar slates.