Specifications

ASTM Product Testing Results & Specifications for Boston Blend Stone Siding 

ASTM Testing Data: Average Results for C-170, C-99, C-97, and C-90

  • Water Absorption: 0.54%
  • Density: 153 lbs per cubic foot

  • Specific Gravity: 2.46

  • Compressive Strength Perpendicular: 19,958 psi

  • Compressive Strength Parallel: 17,307 psi

  • Modulus of Rupture Perpendicular: 1,854 psi

  • Modulus of Rapture Parallel: 2,692 psi

*Size range specification is the minimum to maximum measurement. Material will include pieces that fall into the acceptable range. Highs and lows can be the either end of the range and may not have a mixture of ALL sizes. For example, if a length range is from 4 – 12 inches, it is possible to receive all pieces that are 4-5 inch in length and none 7-12.