It is important to install snow guards evenly across the entire roof area to prevent uneven snow loading on the roof, structure and snow guards. A single row of snow guards along the edge can lead to unnecessary stress on the building. We encourage you to request a custom spacing diagram or to use the Spacing Wizard to create a spacing diagram during checkout. Our purchase process, using the Spacing Wizard, eliminates all the hassle and guess work because we generate custom spacing diagrams to show where each snow guard be installed. You may purchase snow guards without a spacing diagram, however you assume all responsibility and void the manufacturer warranty.