What is the function of flashing in roofing systems?

Flashing plays a crucial role in roofing systems by directing water away from critical areas where it is more likely to accumulate and lead to leaks or water damage. These areas typically include joints, seams, chimneys, vents, and valleys. Flashing is usually made of metal or other waterproof materials and is strategically installed to create a barrier that prevents water from penetrating the roof structure.

By channeling water away from these vulnerable points, flashing helps protect the underlying roofing material and the structure of the building from moisture-related issues, such as mold growth, rot, and structural deterioration. This is essential for maintaining the longevity and effectiveness of the roofing system, ensuring that it performs its function as a protective layer over the home or building.