Which flashing is used at the intersection of a roof area and a vertical side wall with end-of-course flashing pieces?

Which flashing is used at the intersection of a roof area and a vertical side wall with end-of-course flashing pieces?

• A. Counter flashing
• B. Step flashing
• C. Flange flashing
• D. Butt flashing

Answer: (B)

Step flashing is designed specifically for where a roof plane meets a vertical wall. It uses small L-shaped metal pieces that are installed in steps, with each piece under the shingles and against the wall as you move up the wall. This staggered arrangement creates a continuous channel that directs water away from the seam and toward the gutter, preventing it from seeping behind the wall or into the attic. The end-of-course flashing pieces are used to terminate the flashing neatly at the final course, ensuring a proper seal and a clean transition that works with counter flashing to finish the joint. This combination effectively handles water shedding and movement at the roof-to-wall intersection.

Step flashing is designed specifically for where a roof plane meets a vertical wall. It uses small L-shaped metal pieces that are installed in steps, with each piece under the shingles and against the wall as you move up the wall. This staggered arrangement creates a continuous channel that directs water away from the seam and toward the gutter, preventing it from seeping behind the wall or into the attic. The end-of-course flashing pieces are used to terminate the flashing neatly at the final course, ensuring a proper seal and a clean transition that works with counter flashing to finish the joint. This combination effectively handles water shedding and movement at the roof-to-wall intersection.