What describes the lead lap in roofing?

The lead lap in roofing specifically refers to an area where shingles are layered to enhance waterproofing and durability. The correct description identifies this area as being a 2-inch section where shingles are applied in three layers, providing extra protection against water infiltration. This configuration is crucial in areas prone to heavy rainfall or wind, as it ensures a solid barrier against moisture, reducing the risk of leaks.

The complexity of roofing systems often requires specific terminology to identify varied components and their functions. In contrast, descriptions that mention single layers or overlaps between different materials do not accurately capture the essence of the lead lap, which is focused on enhancing the robustness of the roofing with multiple layers for better weather resistance. Additionally, references to transition areas are less relevant to the specific concept of the lead lap, which is concerned specifically with the layering technique rather than the spatial arrangement of roofing materials.