Explanatory notes
… (see heading 27.08, 27.13, 27.14 or 27.15). These articles usually contain fillers such as sand, slag, chalk, plaster, … bitumen, pitch, etc., in blocks of the kind remelted before use are excluded ( Chapter 27 ) whether or not the materials … tiles, flagstones, obtained by pressing or moulding and used for roofing, facing, tiling or paving. (2) Roofing …