Where is step flashing typically installed?

Where is step flashing typically installed?

• A. Only at the ridge
• B. At walls and where roof meets penetrations
• C. Underlayment area
• D. Inside attic

Answer: (B)

Step flashing is used at the joints where a roof plane meets a vertical surface or around roof penetrations. Its purpose is to direct water away from the wall/penetration and into the roof runoff, preventing leaks. You install a series of small flashing pieces that are stepped up the wall and interleaved with shingles, so each piece overlapping the one below creates a continuous, watertight transition. This setup is specifically for roof-to-wall intersections and around features like chimneys and vents. It isn’t placed at the ridge (that uses ridge cap flashing), nor in the underlayment area, nor inside the attic, making the described location the correct one.

Step flashing is used at the joints where a roof plane meets a vertical surface or around roof penetrations. Its purpose is to direct water away from the wall/penetration and into the roof runoff, preventing leaks. You install a series of small flashing pieces that are stepped up the wall and interleaved with shingles, so each piece overlapping the one below creates a continuous, watertight transition. This setup is specifically for roof-to-wall intersections and around features like chimneys and vents. It isn’t placed at the ridge (that uses ridge cap flashing), nor in the underlayment area, nor inside the attic, making the described location the correct one.