Most Roof Leaks Start at the Flashing, Not the Shingles
QUICK ANSWER Shingles shed water running downhill. They do nothing at transitions – where the roof meets a wall, a chimney, a skylight, a valley, or a pipe. That’s flashing’s job, and it’s where the majority of roof leaks actually originate. On a twenty-year-old roof, the field shingles are often still sound while the pipe […]