Understanding the UL Fire Resistance Directories - Ron Blank ...
Understanding the UL Fire Resistance Directories - Ron Blank ...
Understanding the UL Fire Resistance Directories - Ron Blank ...
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<strong>Understanding</strong> <strong>UL</strong>What is <strong>the</strong> difference between “Regular” and Type“X” gypsum wallboard?Q.What is <strong>the</strong> difference between “Regular” and Type “X”gypsum wallboard?A.“eXtra” ”fire resistanttType “X” wallboard, which is typically required toachieve fire resistance ratings, is formulated by addingnoncombustible fibers to <strong>the</strong> gypsum.These fibers help maintain <strong>the</strong> integrity of <strong>the</strong> core asshrinkage occurs, providing greater resistance to heattransfer during fire exposure.