Keywords:
Marking, Installation, Dimensional tolerances, Weight tolerances, Unplasticized polyvinyl chloride, Ultraviolet radiation, Surface spread of flame, Testing conditions, Dimensional measurement, Test specimens, Maintenance, Colour fastness, Grades (quality), Construction systems parts, Polyvinyl chloride, Test equipment, Designations, Extruding, Colour-fastness tests, Environmental testing, Flatness (surface), Flatness measurement, Impact testing, Thickness, Width, Cellular materials, Artificial weathering tests