Light transmitting single skin profiled plastics sheets for internal and external roofs, walls and ceilings. Requirements and test methods|Straightness measurement, Roofs, Testing conditions, Roof coverings, Length measurement, Sheet roof coverings, Conformity, Test specimens, Plastics, Dimensional tolerances, Sheet materials, Thickness measurement, Visual inspection (testing), Ageing tests, Impact testing, Width measurement, Classification systems, Optical properties of materials, Quality control, Transparency, Corrugated, Type testing, Environmental testing, Construction systems parts, Dimensions, Marking, Test equipment