Level 1 sweep and inspection to the NFPA 211 annual standard - flue, crown, cap, and flashing checked and photographed
Chimney sweep logs do not sweep chimneys. They loosen some creosote - which then falls where a brush and vacuum still have to collect it.
Olympia Chimney Damper Repair: The Boston Owner’s Guide
If your Olympia Chimney damper won’t close, is stuck open, or has started rattling every time the wind picks up off the harbor, we stock the repair parts and do the work. In Boston, expect to pay between $285 and $540 for a typical Olympia damper repair, parts included, and we can usually get it done in a single visit. Most homeowners discover the failure in one of two ways: either the living room gets cold and they trace the draft to the fireplace, or they notice black streaks on the ceiling above the firebox from a damper that won’t seal properly during a burn.
We’ve been repairing Olympia Chimney dampers across Boston since 2009. What we see most often isn’t the damper plate itself failing. It’s the hardware around it: corroded pivot pins, a cracked cast-iron frame, or the cable mechanism binding up after years of New England freeze-thaw cycles. The damper operates in a rough environment, and in Boston’s older housing stock, that environment includes decades of accumulated creosote, soot, and moisture from the Atlantic air. The repair itself is straightforward when you know the model and have the part on the truck. We do.
Which Olympia Chimney Models This Applies To
Olympia Chimney manufactures dampers for both masonry and prefabricated fireplaces, and the compatibility gotcha is real: a damper built for a 6-inch flue won’t fit a 7-inch flue, and vice versa. Olympia’s cast-iron and stainless dampers come in standard throat sizes of 5, 6, 7, and 8 inches, with the 6-inch and 7-inch sizes being what we see in most Boston rowhouses and triple-deckers. If you look at the damper frame from inside the firebox, you’ll usually find the Olympia stamp and the size cast directly into the metal. If the stamp is gone or covered in creosote, we measure the throat opening with a flue tape before ordering or pulling a part from the truck.
When it comes to OEM versus aftermarket, our honest position is this: Olympia Chimney OEM parts are well-built, and we install them regularly. But for older Olympia models that have been out of production for years, a quality aftermarket damper from a foundry we trust often gets the job done at a better price point without sacrificing longevity. We’ll walk you through the difference in writing, with a price attached to each option, before you decide. Level Two Chimney Boston is an independent service provider, not affiliated with Olympia Chimney. We carry Olympia parts because they’re good, not because we have to.
One detail worth knowing: Olympia dampers on many Boston fireplaces are sized to the original clay flue liner, which often isn’t round anymore. Settling, spalling, or a previous chimney fire can leave the flue out-of-round, and a damper sized for a perfect 7-inch circle becomes a problem. We check this during the initial inspection. If the flue has shifted, the damper repair needs to account for it, or you’ll be back in the same position next winter.
Signs Your Olympia Chimney Damper Repair Is Failing

- Drafty fireplace when the damper is closed. A damper that doesn’t seat fully lets cold Boston air pour down the chimney. You’ll feel it most on nights when the temperature drops, often accompanied by a faint sooty smell.
- Black streaks or staining above the firebox opening. This is combustion byproduct escaping past a damper that isn’t sealing. It’s a sign the damper has warped or the frame has cracked enough to let smoke through.
- The damper handle or cable feels loose or unresponsive. Over time, the linkage corrodes or the cable stretches. You’ll notice the handle moves without any resistance, meaning the plate isn’t moving with it.
- Visible rust, pitting, or flaking on the damper plate and frame. Boston’s humidity and coastal air accelerate rust. When the damper plate starts pitting, it weakens and warps, which means it will never seal properly again.
- Metallic rattling when the wind blows. A damper that’s loose on its pivot pins or has a broken tension spring will chatter in gusts. It’s annoying, but it’s also a warning sign that hardware is failing and the damper is moving when it shouldn’t be.
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AfterReplacement Cost & What’s Included
In Boston, a typical Olympia Chimney damper repair runs $285 to $540 installed. Where you land in that range depends on three things: the damper size, whether it’s a simple plate-and-pin swap or a full frame replacement, and whether the surrounding masonry needs any attention. A straight damper plate replacement on a 6-inch flue usually comes in at the lower end. Removing and replacing a cracked cast-iron frame, re-sealing it into the flue, and verifying the draft, that’s the higher end.
Every quote we give in Boston is written, itemized, and delivered before any work starts. That’s Clause 1 of the Haven Standard, and we’ve operated that way since 2009. The line item shows the part cost, the labor, and the warranty term. Nothing is bundled into a vague “service fee” that you can’t see. When the work is done, you get a written warranty on the repair, plus the documented photo record of the camera scan we run down the flue as part of every job, per Clause 4 of the Haven Standard. You see what we saw. The camera doesn’t guess. Neither do we.
DIY or Call Us?

You can safely check the damper yourself. Climb into the firebox with a flashlight, look up, and see if the plate moves freely when you work the handle. Note whether it seats completely, whether the frame has visible cracks, and whether there’s heavy rust. What you should not do is attempt to remove and replace the damper plate or frame on your own. The damper is under spring tension, and a plate that slips while you’re on your back underneath it can break fingers or worse. We’ve also seen DIYers install a damper plate one size off because the flue measurement wasn’t accounted for properly, then light a fire and fill their living room with smoke. If you’ve done the visual check and something’s off, call us at (857) 567-8887. We’ll take a camera down the flue, tell you exactly what’s wrong, and hand you a written price before anyone reaches for a tool.
FAQs
In Boston, an Olympia damper typically lasts 12 to 20 years before the frame, plate, or linkage needs repair or replacement. Coastal air, freeze-thaw cycles, and creosote exposure all work against it, which is why homeowners in the city tend to see damper issues sooner than people living in drier inland climates. Regular sweeping extends the life, because creosote holds moisture directly against the metal.
It depends on the failure. A broken pivot pin, worn cable, or failed tension spring can often be repaired without replacing the plate or frame, which keeps the cost at the lower end of the range. If the frame is cracked, warped, or the metal is heavily pitted, replacement is the only option that will actually seal. We’ll show you the camera footage before you decide.
Most Olympia damper repairs in Boston take 60 to 90 minutes from setup to cleanup. Frame replacements that require cutting out the old damper and re-sealing the new one can take a bit longer, but we typically complete the work in a single visit. We’ll give you a written time estimate with the price, before we start.
We stock the most common Olympia damper plates, frames, pivot pins, and linkage components on our trucks, including the 6-inch and 7-inch sizes we see most often in Boston homes. If we need a size or model we don’t have on board, we can usually source it within a few days through our supplier network, which also carries DuraFlex, HeatShield, and Gelco materials. So no matter what we find, you won’t be waiting around for weeks to get it fixed.
Written by Corrine Halstead, Owner, Level Two Chimney Boston at Level Two Chimney Boston, serving Boston and nearby areas.





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