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Can I get a 2-hour fire rating on an exterior wall using DensGlass Gold sheathing?

April 26, 2017DensGlass exterior gold rating sheathing wall

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Can I get a 2-hour fire rating on an exterior wall using DensGlass Gold sheathing?

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5/8″ DensGlass Gold is a UL classified Type X board. That means that 5/8″ DensGlass Gold can substitute for 5/8″ paper-faced Type X gypsum board in all generic fire-rated assemblies. To obtain a 2-hour fire rating on a wood or steel framed wall assembly, use two layers of Type X gypsum board on the inside and two layers of 5/8″ DensGlass Gold on the outside. You also can get a 2-hour assembly by combining a base layer of 5/8″ paper-faced sheathing followed by the outer layer of 5/8″ DensGlass Gold.