19 Building and construction materials and elements made of sand, stone, rock, clay, minerals and concrete; stone, rock, clay and minerals; bricks; unfired bricks; refractory products in the form of bricks; earth for bricks; masonry blocks; coping stones; building bricks (non-metallic -); wall stone; stones; earthenware tiles; quarry tiles; stone roofing tiles; building stone; roofing tiles, not of metal; tarred roofing paper; asphalt roofing felt; asphalt roofing paper; pantiles, not of metal; roof gutters, not of metal; scantlings [carpentry]; roofing slates; roofing shingles; roof coverings, not of metal; chimney pots, not of metal; chimney cowls, not of metal; non-metallic stack linings for building; chimneys, not of metal; bituminous coatings for roofing; roof flashing, not of metal; roofing, not of metal; roofing underlayment; facade elements of non-metallic materials; facade construction components of non-metallic materials; cladding (non-metallic -) for facades; building fronts (non-metallic -); non-metallic building facade elements; non-metallic facing tiles for use in buildings; roofing, not of metal, incorporating photovoltaic cells; facades of non-metallic materials; roofing fabrics; roofing plate (non-metallic -); non-metal building materials incorporating fireproof seals; roofing paper; dormer vents (non-metallic -).