H-Shield HD is a 1⁄2" thick, 109 psi max high-density polyiso insulation panel specifically designed for use as a cover board. It is manufactured on-line to a premium performance coated glass facer on both sides. H-Shield HD delivers an R-value of 2.5 in its 1⁄2" profile; significantly higher than roof cover boards made with other materials such as woodfiber or gypsum.
ASTM C 1289 Type II, Class 4, Grade 1 (109 psi max)
Mechanically attached, Low-rise adhesives