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Commercial roof replacement?

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Replacing a current commercial roof - SAS membrane that meets ASTM 6162 vs. one that meets ASTM 6163 or ASTM 6164. Which is better and why?

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  1. Basically you are looking at bitumen with glass fiber, polyester or the hybrid combination of glass and polyester.

    Polyester provides a higher strength.

    Glass provides a higher fire rating.

    The hybread provides a combination.

    The application dictates the material.

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