A chimney cap is the metal cover with mesh sides that sits over your flue — and in the Puget Sound it earns its keep every single day. It keeps rain out of the flue, blocks nesting birds and squirrels, stops downdrafts, and catches embers. Plenty of Seattle and Tacoma chimneys have no cap at all, or a rusted one that's given up. Here's what installing a proper cap costs and why it's one of the cheapest, highest-value things you can do for a chimney here.
What chimney cap installation costs in Seattle
Cap pricing depends on the flue and the cap. A standard single-flue cap — a stainless or galvanized cap sized and secured over one flue — runs about $299–$700. A custom or multi-flue stainless cap, covering several flues or the whole crown with a made-to-fit stainless cover, runs $700–$1,600. Chimney height, roof access, and cap material affect the total. We size the cap to your flue and give you a written quote first — no guessing on fit.
Why every Seattle chimney should have a cap
- Keeps our near-constant rain out of the flue, where it rusts components and soaks the masonry.
- Blocks birds, squirrels, and raccoons from nesting in the flue — common in wooded Puget Sound neighborhoods.
- Stops downdrafts and wind-driven rain from pushing back down the chimney.
- Catches sparks and embers before they reach a moss-covered or wooded roof.
- Keeps leaves and debris from clogging the flue.
Why an open flue is trouble in the Puget Sound
An uncapped flue is an open funnel pointed straight up at our weather. Every storm drops rain right down it, where the water rusts metal components, dampens the masonry, and speeds up freeze-thaw damage inside the chimney. Wildlife treats an open flue as prime nesting real estate, and those nests block airflow and hold even more moisture. A quality stainless cap ends all of that at once — which is why it's usually the first thing we recommend on a chimney that doesn't have one.
Choosing the right cap and a fair price
The right cap is one sized correctly to your flue in a material that survives our wet air — stainless is worth it here, since galvanized caps rust out faster in constant moisture. We'll recommend the cap that actually fits your chimney rather than upselling you. Installation quotes are free and in writing, we're happy to give a free second opinion, and we price-match any honest competitor and beat it by 10–25%.
What Chimney Cap Installation Costs in Seattle (2026)
Real 2026 ranges for the Seattle–Tacoma–Everett area, with a free written quote before any work begins.
| Standard single-flue cap | $299–$700 |
| Custom or multi-flue stainless cap | $700–$1,600 |
Get a free quote
See our full chimney service pricing, or learn more about Chimney Cap Installation. You get a free written quote before any work begins — call 206-453-2045 or request your free quote online.