The details of a building are the individual components and how they are put together. Some are a deliberate part of the appearance of a building, including doors, windows and their surrounds, porches, decorative features and ironmongery.
Others are functional, although they can also contribute to the appearance of a building. These include lighting, flues and ventilation, gutters, pipes and other rainwater details. Detailing affects the appearance of a building or space and how it is experienced. It also affects how well it weathers and lasts over time.