Chimney Flashing Repair Cost in Seattle (2026)

Flashing is the metal that seals the joint where your chimney meets the roof, and it's the number-one reason chimneys leak in Seattle. When homeowners see a water stain near the chimney, they blame the chimney or the roof — nine times out of ten it's the flashing. The good news: it's usually one of the cheaper leaks to fix if you catch it early.

What flashing repair costs in Seattle

A repair or reseal — replacing failed sealant, re-securing loose flashing, correcting a small section — runs about $299–$900. A full flashing replacement, with new step-and-counter flashing set into the mortar the right way, runs $900–$2,500 depending on chimney size and roof access. If the leak has already damaged the roof deck or interior, that's quoted separately.

Why flashing fails here

Most Seattle flashing leaks come from tar or caulk 'repairs' smeared over the joint by a previous owner or a roofer in a hurry. Sealant dries out, cracks, and pulls away in our freeze-thaw and constant rain. Real flashing isn't caulked on — it's step flashing woven into the shingles and counter-flashing set into the mortar joints, so water is physically directed away. When we replace flashing, we do it the permanent way.

Signs your flashing is leaking

Water stains on the ceiling or wall near the chimney.
A damp, musty firebox after rain.
Visible tar or caulk at the chimney-to-roof joint (a temporary patch that's now failing).
Rusted or lifting metal at the base of the chimney.

Fix flashing before it rots the roof

A flashing leak doesn't stay a flashing leak. Left alone, it soaks the roof sheathing and framing around the chimney, and a $299–$900 repair becomes a roof-and-framing job. If you have a stain near the chimney, get it diagnosed before the next wet stretch. Our diagnosis and quote are free and in writing, with a free second opinion and price-match plus 10–25%.

What Chimney Flashing Repair Costs in Seattle (2026)

Real 2026 ranges for the Seattle–Tacoma–Everett area, with a free written quote before any work begins.

Flashing repair / reseal	$299–$900
Full flashing replacement (step + counter)	$900–$2,500
Interior water damage	quoted separately

Get Your Free Quote See full pricing →

Get a free quote

See our full chimney service pricing, or learn more about Chimney Flashing Repair. You get a free written quote before any work begins — call 206-453-2045 or request your free quote online.

Questions homeowners ask

How much does chimney flashing repair cost in Seattle?

A repair or reseal runs about $299–$900; a full replacement with proper step-and-counter flashing runs $900–$2,500, depending on chimney size and roof access. You get a written quote first.

How do I know if my chimney flashing is leaking?

Look for water stains near the chimney, a damp firebox after rain, or tar/caulk smeared at the roof joint. Flashing is the most common source of chimney leaks, so it's the first thing we check.

Why does tar keep failing on my flashing?

Because tar and caulk aren't flashing — they're a temporary patch that dries and cracks in our climate. Proper flashing is metal woven into the shingles and set into the mortar so it physically sheds water.

Can flashing leaks damage my roof?

Yes. Left alone, a flashing leak soaks the roof deck and framing around the chimney, turning a small repair into a much larger job. Fixing it early is far cheaper.

Do you charge for a leak diagnosis?

No. Our diagnosis and written quote are free, and include a free second opinion plus a price-match of 10–25% on comparable work.