Descriptors | Freeze-thaw tests, Statistical quality control, Roof coverings, Cements, Statistical methods of analysis, Watertightness tests, Fibres, Specimen preparation, Grades (quality), Environmental testing, Fasteners, Load capacity, Performance, Testing conditions, Marking, Acceptance inspection, Strength of materials, Dimensional measurement, Reinforced materials, Density measurement, Finishes, Thickness, Height, Bend testing, Roofing slates, Dimensional tolerances |