What does the term 'accessory' refer to in the context of roofing?

The term 'accessory' in the context of roofing refers to additional components that aid in the overall functionality and performance of the roofing system. These accessories, such as vents, drains, or skylights, are not the primary materials used to construct the roof itself, but they perform important roles that can enhance energy efficiency, water drainage, ventilation, or natural lighting.

Including these accessories in the roofing system can significantly impact its durability and effectiveness. For example, proper ventilation is crucial in both preventing moisture buildup and extending the life of the roofing materials. Therefore, understanding the role of accessories is vital for anyone involved in roofing to ensure that the roofing system operates effectively as a whole.