Chimney Flashing Repair in Greater Seattle, WA

Signs Your Flashing Is Leaking

Flashing is the metal seal between your chimney and your roof. When it fails, water gets into your walls and ceilings — often without an obvious source. It's the most common cause of chimney-related water damage we see. We tear out the bad flashing and do it right.

Flashing problems often go unnoticed until there's visible damage inside. By then, water has been working behind your walls for months. If you notice any of these signs, flashing is the first thing to check.

Our Repair Process

Why It Fails

Flashing Doesn't Last Forever

Flashing fails for a few reasons: the original installation was done with just caulk instead of proper step and counter flashing; the mortar that holds counter flashing in the chimney joints cracks and lets it pull away; or the metal itself corrodes after years of exposure. In the Pacific Northwest, constant wet-dry cycles accelerate all of it.

A proper repair replaces the flashing — not just re-caulks it. Caulk-only fixes last a year or two before they fail again.

Want to understand what flashing repair costs before you call? Our chimney flashing repair cost guide covers every pricing variable specific to the Pacific Northwest.

Where Chimney Meets Roof

Chimney Repair at the Roofline

The roofline is where most chimney leaks actually start. It's the junction of two different systems — masonry and roofing — that expand, contract, and weather at different rates. Roof chimney repair means treating that junction as a whole rather than patching one side of it.

When we're up there, we're looking at the step flashing woven into the shingle courses, the counter flashing set into the mortar joints, the sealant at the top edge, and the condition of the brick and mortar immediately above the roof plane. A roofer will often reseal the flashing and stop there; if the masonry behind it has opened up, the leak comes back the next wet season.

If the chimney above the roofline is also deteriorating, flashing work alone won't solve it — that's chimney masonry repair territory. If you're trying to separate roofline flashing from the crown and cap at the top, our chimney crown vs. cap guide explains the difference. And if you're seeing water inside but can't tell where it's entering, start with chimney leak repair and we'll diagnose it before quoting.

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