Flat roof installations require extra care and attention in order to produce a high-quality, durable, and beautiful roof that will last. Over many years of experience we have found the Self Adhering flat roof installations to overall perform on flat roofs. Self adhering means no nail penetrations – very important if you consider it being a flat roof surface. The CertainTeed Flintlastic roof system has a Granulated SA (Self Adhering) Cap Sheet. The granulated surface requires no additional coatings over the years to maintain your flat roof surface.