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What is the difference between “regular” and “Type X” gypsum board?

April 26, 2017gypsum regular type x

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What is the difference between “regular” and “Type X” gypsum board?

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Both regular and Type X gypsum board are covered under the ASTM C 1396 36, gypsum board standard specification. Regular gypsum has naturally occurring fire resistance due to the presence of gypsum in the core. Type X has special core additives to increase the natural fire resistance.