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Securock® Glass-Mat Roof Board comes in 1/4" 4x8, 1/2" 4x8, and 5/8" 4x8.

Securock® Cement Roof Board comes in 1/2" 4x8.

Securock® Gypsum-Fiber comes in 1/4", 3/8", 1/2", 5/8" thickness; 4x4 and 4x8 width/lengths; and there are half pallet options too.