19 [ CEILINGS, PANELS, AND TILES; CONSTRUCTION BOARDS FOR WALL, CEILING, ] SILICATE INSULATING BUILDING BLOCKS, PIPE COVERING, [ AND ROOFING TILE; ] ROOFING MAT OR FELT IMPREGNATED WITH ASPHALT, TAR, OR OTHER MATERIAL FOR USE IN BUILT-UP ROOFING CONSTRUCTION; MINERAL-SURFACED ASPHALT IMPREGNATED FIBROUS SHEET MATERIAL; PAPER AND ASPHALT VAPOR BARRIER; ROOFING SHINGLES; GLASS FIBER REINFORCED [ PLASTIC PIPE, ] MANHOLES, [ AND WETWELLS; ] CHEMICALLY MODIFIED ASPHALT FOR USE IN REPAIR AND MAINTENANCE OF BITUMINOUS AND PORTLAND CEMENT AND CONCRETE SURFACES; AND GLASS FIBER REINFORCEMENT FILAMENTS, STRANDS, MATS AND THE LIKE FOR REPAIR AND MAINTENANCE OF PAVEMENTS AND BITUMINOUS AND CONCRETE SURFACES