JM DensDeck Roof Board - Insulation and Cover Boards
Meets the requirements of ASTM C 1177
Fire Performance: FM Class 1 for fire barrier requirements and UL Class A unlimited slope with excellent surface burning characteristics. 5/8" thickness meets the requirements of Type X per ASTM C 1177.
Moisture and Mold Resistance: Scores a 10, the highest performance level for mold resistance, when tested in accordance with ASTM D 3273.