![]() Model building code requirements regulate the surface burning characteristics of building materials by referencing, or basing their own standards on, ASTM E84. However, the Life Safety Code Handbook points out that both the substrate and the air cavity behind the substrate may affect the performance of thin wallcoverings in fire conditions and recommends that wallcoverings less than 1/28 inch thick also be tested as they would be installed in the field. ![]() Model building codes currently exempt wallcoverings less than 1/28 inch thick from any form of testing if their surface burning characteristics are no greater than paper wallcovering of the same thickness.
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