technical data 

•       Absorption 12.5%

•       Compression strength:  3,400 psi in accordance with ASTM C39

•       Thickness:  1 to 3 inches

•       Splitting Tensile Strength:  305 psi

•       Fire Rating:  Shows zero flame spread, zero fuel contributed, and zero smoke development

•       Installed Weight:  9 to 12 lbs./sq. ft. (approx.)

•       R Value:  0.75 to 1

•       Color Retention:  Permanent mineral oxide colors are used and will have no unsightly color change after years of weathering