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ASTM for roofing slate

ASTM is the abbreviaton for 'American Standard Test Methods'. These standards define the important rock parameters and how they has to be tested, leading to a classification of quality. For roofing slate, the following norms are of importance:

  • C 119 = Definition of Roofing Slate
  • C 406 = Standard Specification for Roofing Slate
  • C 120 = Standard Test Methods of Flexure Testing of Slate (Breaking Load, Modulus of Rupture, Modulus of Elasticity)
  • C 121 = Test Method for Water Absorption of Slate
  • C 217 = Test Method for Weather Resistance of Slate

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