How Do You Maintain Roof Flashing to Prevent Leaks?

A visual inspection from the ground using binoculars is a safe first step. Look for obvious signs like bent, missing, or detached flashing pieces. Check for discoloration or stains on the flashing itself, which can indicate rust on steel or corrosion on other metals. Pay close attention to where different materials meet, as these intersections are common leak points.

For a closer look, you can safely inspect from a sturdy ladder if you feel comfortable. Never walk on the roof unless you have proper training and safety equipment. Look for gaps between the flashing and the roof surface, and check the condition of any caulking or roofing cement. If you see granule loss from shingles near the flashing, it may signal water flow issues.

• Check for lifted nails or missing fasteners.
• Look for cracks or splits in the metal.
• Inspect sealant for brittleness, gaps, or peeling.
• Remove any leaves, pine needles, or dirt buildup.
• Ensure flashing lies flat against the roof surface.
• Look for white, chalky oxidation on aluminum flashing.

You should contact a professional roofer if you notice extensive corrosion, large sections of detached flashing, or complex issues around chimneys or skylights. If the roof decking or surrounding shingles feel soft or show signs of rot, the problem has likely progressed beyond the flashing. A roofer can evaluate whether repair or full replacement of the flashing system is necessary.

Attempting complex repairs yourself can void roofing material warranties or cause further damage. A qualified roofer has the tools and knowledge to properly integrate new flashing with your existing roof system. They can also identify related problems you might miss, such as compromised underlayment, which is critical for preventing future leaks and the need for emergency water extraction inside your home.