What does the term Tab refer to in roofing?

The term "Tab" in roofing specifically refers to the exposed portion of strip shingles. Strip shingles are typically designed with a staggered pattern, and each shingle has tabs that are visible from the ground once installed. These tabs create the distinctive layered appearance of strip shingles, contributing both to aesthetics and effective water shedding. Understanding the structure and terminology of shingles is crucial for anyone involved in roofing, as it helps in identifying different types of shingle installations and their respective benefits.

The other choices correspond to different aspects of roofing but do not accurately match the definition of a "Tab." For example, the edge of a roofing membrane relates to a different component used in flat roofing systems, and insulation material pertains to energy efficiency rather than shingle construction. Main structural supports in a roof are usually referred to as rafters or trusses, further differentiating those terms from the context of shingles and their components.