Louisiana Residential Roofing (7-803) Practice Test

High-Wind Zones require a proper flashing system at the roof-to-wall transition to keep water from getting behind the roof cover. Step flashing is installed along the edge where the roof meets the wall, with segments stepping up the wall under each course of shingles so water is directed away from the joint. Counter flashing is then applied over the step flashing, secured into the wall material, and overlapping the step flashing to seal against wind-driven rain and movement. This combination creates a continuous barrier at the intersection and resists wind uplift. Caulk alone can't hold up under wind and temperature cycling, so it can crack and leak; having no flashing leaves the joint exposed to water intrusion; and relying solely on shingles does not address the wall interface where leaks commonly occur.