Flashing

Metal seals at every roof transition — where 80% of all roof leaks originate.

Flashing is the sheet metal installed at every transition point on your roof — where the roof meets a wall, chimney, vent pipe, skylight, or valley. These thin metal pieces (typically aluminum, galvanized steel, or copper) are custom-bent and sealed to channel water away from vulnerable joints where two surfaces meet. Types include step flashing (along walls), counter flashing (at chimneys), valley flashing (where two roof planes meet), and pipe boot flashing (around vent pipes).

Why It Matters

Roughly 80% of all residential roof leak calls we respond to in the Bay Area trace back to flashing failure — not shingle or tile failure. Flashing is the most failure-prone component because it is subjected to thermal expansion and contraction, sealant degradation, and physical stress at every transition point. Chimney flashing is the most common culprit, followed by valley flashing and pipe boots. The good news: flashing repair is typically a fraction of the cost of a full roof replacement and can be completed in a single day.

Flashing FAQ

How do I know if my flashing is failing?

Common signs include water stains on ceilings near chimneys or walls, rust streaks on exterior walls, visible gaps between flashing and the surface it seals, or cracked/missing sealant at flashing edges. During a roof inspection, we check every flashing point for these issues.

Can flashing be repaired or does it need full replacement?

It depends on the extent of the damage. Minor issues like cracked sealant or a small lifted section can often be repaired in under an hour. Severely rusted, bent, or improperly installed flashing should be fully replaced. We assess every situation individually and always recommend the most cost-effective solution.

Need Flashing Work?

Schedule an inspection. We will assess your flashing and recommend the most cost-effective solution.

Request Free Inspection Call (555) 123-4567