What is the main function of the drip edge?

The primary function of the drip edge is to direct water away from the trim and sheathing of a roof. This essential component is typically a piece of metal flashing that is installed at the edges of a roof to ensure that water runs off effectively, preventing it from seeping underneath the roof covering and potentially causing damage to the underlying structure. By guiding water away, the drip edge helps protect vulnerable areas of the roof, such as the fascia board and wooden sheathing, from decay or deterioration caused by prolonged moisture exposure. This water management is crucial for maintaining the integrity and longevity of a roofing system, emphasizing the importance of the drip edge in roof construction and maintenance.