Mineral Rolled RoofingSection R905.5 IRCSection R905.5 FBC ResidentialCode ReferenceDescription R905.5.1Rood Deck RequirementsR905.5.2Roof SlopeR905.5.3UnderlaymentR905.5.3.1Ice BarrierR905.5.4Material Standards or ASTM RequirementsR905.5.5Application