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Is My Exterior Wall Material Truly Noncombustible?

One would think that the separation between combustible material and noncombustible material would be simple, however it is far more complicated than it would appear when referencing the International Building Code (IBC). Typically, ASTM E136 is recognized as a pass/fail test for material combustibility, but the IBC has an exception where a product is recognized as noncombustible even though it doesn’t pass ASTM E136.

 One would think that the separation between combustible material and noncombustible material would be simple, however it is far more complicated than it would appear when referencing the International Building Code (IBC). Typically, ASTM 

 E136 is recognized as a pass/fail test for material combustibility, but the IBC has an exception where a product is recognized as noncombustible even though it doesn’t pass ASTM E136.

 

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