Step Flashing is a vital component of most roofing systems, as it protects the interface between the roof and vertical wall from water penetration. It is preferred over continuous flashing because it can be overlapped with shingles to ensure that the water that would normally migrate underneath a shingle is directed on top of the flashing that covers it. This allows the water to drain away in a safe and efficient manner. RoofingDirect.com has numerous options to choose from. We sell Step Flashing in different profiles from coast to coast. Some markets use a smaller 4" x 4" x 8", while other markets use a large 4" x 4" x 14", it just comes down to personal preference. We also sell incredibly durable and beautiful copper flashing. If your not finding what you need, please contact us and we should be able to get it.