Final answer:
The type of flashing found on a gable edge is known as gable or rake flashing, which is made out of metal and designed to prevent water infiltration by directing it away from the building. This flashing is crucial for protecting the structure of a building and maintaining the integrity of the roof at its edges.
Step-by-step explanation:
The type of flashing found on a gable edge is known as gable or rake flashing. This specific type of flashing serves an important role in preventing water infiltration at the edges where the roof intersects the gable end. When rainwater or snow melt flows down a roof, it can potentially penetrate into the building envelope at the roof's edges without proper flashing.
Gable flashing is typically made out of metal, with common materials including aluminum, steel, or copper. These materials are chosen because they are durable and can withstand the elements without corroding too quickly.
The flashing is installed over the roofing material along the gable edge and extends down the side of the building, providing a clean, finished look while also functionally directing water away from the gable end and down the side of the house instead of allowing it to enter the attic or wall structure.
Installation of gable or rake flashing is an important part of the roofing process and requires precision. It is typically nailed or screwed into place and covered with a second piece of flashing, sometimes called cap flashing, to ensure that the fasteners themselves do not become entry points for water. Additional sealants might be applied to the edges of the flashing to secure it further and reduce the risk of leakage.