What makes a Cast Stone Institute member different?

Producer members (manufacturers) must pass a rigorous 86-step plant certification.

  • Product Quality Control ( Compressive Strength and Absorption )
  • Safety (OSHA Compliant)
  • Product Consistency (Checked for Dimension, Color, Texture, and Tolerances)
  • Recordkeeping
  • Housekeeping
  • Recertification every two years to insure producers maintain high standards set by the Institute.

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