The standard fastening pattern for all Atlas polyiso sheathing applications is a spacing of 12" OC for all fasteners, with fasteners going into all supporting framing members. 24" OC is the maximum span for the supporting framing members. Typically, standard 3/8" dia. roofing nails are used in lengths long enough to penetrate into the framing members at least 3/4". Stucco Shield applications require specifically designed fasteners and plates made for use in stucco systems, ( contact the stucco system supplier for these special fasteners).