This code implies that all roof materials that pass the testing provided in the ASTM E 108 fire testing under the light category are identified as Class C roof assemblies.
Roof replacements shall comply with Section C402.1.3, C402.1.4, C402.1.5 or C407 where the existing roof assembly is part of the building thermal envelope and contains insulation entirely above the roof deck.
This code implies that all roof materials that pass the testing provided in the ASTM E 108 fire testing under the moderate category are identified as Class B roof assemblies
This code implies that all low-slope roof covering materials must be able to withstand typical impact loads, such as foot traffic, hail and driving rainstorms.