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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