Which flashing type is specifically used to direct water away from risers in a roof?

The selected type of flashing that is specifically used to direct water away from risers in a roof is step flashing. Step flashing is typically installed in conjunction with the roofing material and involves individual pieces of flashing that are layered with the shingles or other roofing material. This arrangement allows water to flow over each piece, helping to prevent water from seeping under the roofing and into the structure around the risers, which could lead to leaks and other water damage.

Understanding the function of step flashing is crucial when considering areas where vertical surfaces, like walls or chimneys, meet sloped roofs. The steps or layers of flashing create a built-in drainage system that effectively channels water away from the risers, protecting the integrity of the roof and the building below.

Counter flashing, skirt flashing, and apron flashing serve different purposes and are used in different contexts. Counter flashing is typically used in conjunction with masonry or chimneys to prevent water from running down the brick or stonework. Skirt flashing is used at the edges of roofs where they meet vertical surfaces, providing a seal against water ingress. Apron flashing directs water away from the top of items such as chimneys or vent pipes but does not engage with risers like step flashing does.