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Chimney Damper Repair in Seattle, Tacoma & Everett
A damper that will not open, will not close, or never seals is costing you heat and letting smoke and rain in. We free, rebuild or replace it. Free quote.
- Free 2nd-opinion quotes
- Price match + 10–25% discount
- Same-day service often available
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The damper is the metal plate at the throat of the fireplace, just above the firebox, that opens to let smoke out and closes to keep your heated air in when the fireplace is idle. It sits in the wettest, sootiest spot in the whole chimney, which is why it is the part of a fireplace most likely to be rusted, jammed, warped or missing its handle. Chimney damper repair is the service that gets that plate working and sealing again.
This page is for homeowners whose damper handle moves but nothing happens, whose plate is stuck open so the living room is cold all winter, whose plate is stuck shut so the fireplace cannot be used, or whose damper closes but leaves a gap you can feel cold air pouring through. It also covers the decision that comes up on most damper calls: whether to repair the original throat damper or replace it with a top-sealing damper mounted at the top of the flue. Broader firebox, hearth and smoke chamber problems are covered on our fireplace repair page.
Call 206-453-2045 for a free quote. We serve Seattle, Tacoma, Everett and the road-accessible Puget Sound, and same-day service is often available.
Symptoms
Signs you need chimney damper repair
- Damper handle or chain moves freely but the plate does not
- Plate is frozen open or frozen shut and will not budge
- Cold draft from the fireplace opening even with the damper closed
- Daylight or rain visible when you look up past the closed plate
- Rust flakes, soot or debris falling onto the smoke shelf and firebox floor
- Smoke spills into the room because the plate only opens partway
- Grinding or screeching when the damper is operated
- Damper handle, pivot pin or ratchet missing altogether
Common causes
- Rain and condensation running down an uncapped flue onto the cast-iron plate
- Heat warping a thin plate so it no longer seats in its frame
- Creosote, soot and nesting debris packing the hinge and track
- Mortar and brick around the damper frame failing, letting the frame shift
- Pivot pins, springs or handles corroding through after decades of use
- A damper that never sealed well to begin with, common on older masonry fireplaces
How It Works
Our chimney damper repair process
We run the damper through its full travel with a light on the plate, check whether the frame is seated and whether the plate meets it all the way around, and look at the smoke shelf above for rust scale, water staining and debris. We check the handle, pivots and ratchet, then look up the flue to confirm a cap is in place, because a rusted damper without a cap will rust again. If a top-sealing damper is on the table, we check the flue top for a surface it can seal against.
Free quote and damper check
We test the plate, frame, handle and seal, explain what failed, and give you a written repair or replacement quote.
Clean the throat
Creosote, rust scale and debris are cleared from the hinge, track and smoke shelf so the plate can move and seat. Often this alone frees a stuck damper.
Repair the mechanism
Seized pivots are freed and lubricated with a high-temperature product, bent handles and ratchets are replaced, and a plate that has jumped its track is reseated.
Replace what cannot be saved
A warped or rusted-through plate is replaced with a matching throat damper, or we install a top-sealing damper at the flue top with a stainless cable to a handle in the firebox.
Seal check and walkthrough
We confirm the plate opens fully and closes tight, show you how to operate it, and note any cap or crown work needed to keep water off the new damper.
Options
Repair and service options
There are three ways to fix a damper, and the right one depends on how far gone the original is:
- Free and service the existing damper: cleaning, freeing seized pivots, replacing a handle or ratchet, reseating the plate. The least expensive route and the one that works when the plate and frame are still sound.
- Replace the throat damper: when the plate is warped, cracked or rusted through but the masonry around the frame is fine. A new plate and frame are fitted in the original throat.
- Install a top-sealing damper: a spring-loaded lid with a rubber gasket mounted on top of the flue, operated by a cable from the firebox. It seals far tighter than a metal-on-metal throat damper, keeps rain and animals out, and doubles as a cap. We recommend it when the throat damper is beyond repair or the frame masonry has failed.
Whichever you choose, the quote is free, and we price match any written quote plus 10–25% off. If the damper problem turns out to be a cap or crown problem, we will say so.
Pricing
What affects the price
- Whether the plate and frame can be serviced or must be replaced
- Throat damper replacement versus a top-sealing damper
- Flue size and shape at the top for a top-sealing unit
- Amount of creosote and rust to clear before the mechanism can be worked on
- Condition of the masonry around the damper frame
- Whether a cap or crown repair is needed to stop water reaching the damper
- Roof access and chimney height for top-mounted work
Every chimney is different, so you get a written quote after we look at the system. Ask about our price match and free second-opinion quote.
Safety & Seattle Conditions
Safety considerations
A damper that will not open fully is a smoke and carbon monoxide problem, not just a nuisance. Do not burn a fire until the plate opens all the way, and never wedge a partly open damper with a tool or log. A damper stuck shut should not be forced; a cracked plate or a dislodged frame can drop into the firebox.
If your fireplace has gas logs, the damper is often fixed partly open by a clamp on purpose, and it must stay that way. Do not adjust it, and do not touch the gas valve or pilot; tell us it is gas when you call. NFPA 211 recommends an annual inspection, which is where most damper problems are caught.
Seattle & Puget Sound conditions
Dampers fail faster around Puget Sound than almost anywhere because of what falls down an uncapped flue. Sea-Tac's NOAA 1991–2020 normals put annual rainfall at 40.34 inches, with about 73% of it landing October through March, exactly the months the fireplace is in use and the plate is cycling hot and cold. Rain that lands on a cast-iron plate and sits on the smoke shelf is why so many dampers here are rust-welded into one position.
The heating-season heat loss is real, too. Seattle sees about 60 days a year where the temperature touches 32°F, and winter lows at Sea-Tac average around 37°F through December, January and February. A damper that does not seal is an open window in the roof through all of that.
Our Work
Chimney Damper Repair in action
Damper stuck, rusted or leaking cold air? Get it fixed before the next fire.
Free quote, free second-opinion quote, price match plus 10–25% off, same-day service often available. If you're not happy, we're not done. Call 206-453-2045.
☎ 206-453-2045 Request a QuoteQuestions
Chimney Damper Repair FAQ
Can a stuck damper be freed without replacing it?
Often, yes. Most stuck dampers are packed with creosote and rust scale or have seized pivot pins, and cleaning, freeing and lubricating the mechanism gets them working. If the plate is warped so it no longer seats, or the frame has rusted through, replacement is the honest answer. We tell you which during the free quote visit.
What is a top-sealing damper and why do you recommend it?
It is a lid with a rubber gasket that mounts on top of the flue and is opened and closed with a cable from inside the firebox. It seals much tighter than a throat damper, keeps rain and animals out of the flue, and replaces the cap. It is our usual recommendation when the original throat damper is beyond repair.
Does a top-sealing damper mean I no longer need a chimney cap?
A top-sealing damper closes the flue when the fireplace is idle and takes the place of a standard cap on most single-flue chimneys. When it is open during a fire it still keeps most rain out through its hood. On multi-flue chimneys or unusual crowns we will tell you whether a separate cap still makes sense.
My damper closes but I still feel cold air. Is that normal?
It is common, but it is not something you have to live with. Throat dampers are metal plates seated on metal frames, and after years of heat and rust they rarely seal. The fix is either reseating and cleaning the plate or switching to a top-sealing damper with a gasket, which is the only type that seals tight.
How long does damper repair take?
Freeing and servicing a damper is usually done in a single visit, and replacing a throat damper or installing a top-sealing damper is normally the same. If the masonry around the damper frame has failed and needs rebuilding, that adds time and we quote it separately. Same-day service is often available.
Should I repair the damper or the whole fireplace?
If the only problem is the damper, fix the damper. If the smoke shelf is full of rust, the firebox joints are failing and the flue has no cap, the damper is one symptom of a water problem, and a chimney inspection will map it so you fix the cause once.
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