Labels:monitor | reckoner | sky OCR: PROBLEI AREAS The following are some of the most common examples of installation problems that we see Underlaym ent should be installed horizontally and staggered from eave to ridge. Fasteners: Typically minimum of two fasteners per clip are required. This provides better hold down strength and prevents the clip from torquing around a single fastener. Inadequate allowance in flashing design to accommodate expansion contraction PROBLEM fast eners accommodat