![]() ![]() ![]() Beside gypsum wall board, plywood and OSB, other materials such as T&G decking may meet the 15 minute thermal barrier requirement. The APA has reported that 23/32” western species plywood or OSB will meet the 15 minute thermal barrier. What counts as a thermal barrier?Ī thermal barrier is a material, applied between foam plastics (including spray polyurethane foam) and interior spaces designed to delay the temperature rise of the foam during a fire situation and to delay or prevent the foam’s involvement in a fire. The International Building Code (2006 IBC) requires foam plastic insulation to be separated from the interior of a building by an approved thermal/fire barrier of 1/2-inch gypsum wallboard or equivalent thermal barrier that will prevent temperature rise to not more that 250 degrees F (121 C) in a 15-minute time period. What is considered a 15 minute thermal barrier? Ure-K is a spray-applied 15-minute Thermal Barrier approved to go over exposed applications of polyurethane foam in existing buildings and new construction projects as a combination system to meet mandatory code requirements.
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