1.1 These test methods cover the physical testing of gypsum panel products.
1.2 The test methods appear in the following order:
C11-25
Standard Terminology Relating to Gypsum and Related Building Materials and Systems
E177-26a
Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods (Includes all amendments and changes 5/14/2026).
E4-24
Standard Practices for Force Calibration and Verification of Testing Machines
TAPPI T441
Water Absorptiveness of Sized (Non-Bibulous) Paper, Paperboard, and Corrugated Fiberboard (Cobb Test)
E691-23
Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method