How do I tell if my damper is open or shut?

With a flashlight and no fire burning, look up through the firebox. You should see an open throat and daylight or the flue above it, not a flat steel plate. If you cannot tell, leave the fireplace alone until someone has looked at it.

My damper is stuck open. Is that urgent?

It is not a smoke hazard, but it costs you heat. A damper stuck open vents warm air up the chimney through every cold New Rochelle winter, and cold air drops back down into the room.

Why does this keep happening to chimneys near the water?

New Rochelle's frontage on Long Island Sound means salt-laden air and high humidity, which accelerates rust on chimney caps and flashing. Once those fail, water gets into the flue and goes to work on the damper. Fitting a cap is usually part of fixing the damper properly.

Do I need a permit for this in New Rochelle?

Permits in New York are issued locally, by the municipal building department and code enforcement officer, not by a state agency. Routine sweeping and inspection generally do not need one, but structural masonry work above the roofline usually does. Call the local building department before work begins.

Is there a state license for chimney work in New York?

New York does not issue a statewide chimney sweep or chimney inspection license. Westchester County runs its own home improvement contractor licensing program, so verify current requirements with the county consumer affairs or licensing office. You can always ask the technician for their reasoning in writing and to show you what they found.

Damper stuck in New Rochelle, NY

The handle will not move, or it moves and nothing happens. That usually means the damper plate has rusted into its frame, or the pivot, handle or hardware has corroded and given way. If it is stuck closed, smoke has nowhere to go but back into the room. If it is stuck open, your heated air goes up the flue all winter and cold air drops back down.

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Rust from an uncapped flue is the usual cause. New Rochelle sits on Long Island Sound, and the salt-laden air and high humidity along the shoreline eat at chimney caps, flashing and the steel parts inside a chimney. Add repeated freeze-thaw cycles, snow and ice, plus nor'easters and tropical remnants driving rain into the stack, and a throat damper in a 1920s to 1950s brick or stucco house has had decades of water running over it.

While you wait — please don't

Do not light a fire until you know the damper is open. A closed or partly closed damper pushes smoke and carbon monoxide straight back into the room.
Do not force the handle. Forcing a rusted damper can break the frame out of the masonry and turn a small repair into masonry work.
Stop using the fireplace if smoke came into the room. Smoke in the living space means the flue is not carrying it out, and that needs looking at before the next fire.
If anyone feels dizzy, sick or has a headache, get out. Those can be signs of carbon monoxide — leave the house, then call 911.

What the technician does

The damper is opened and assessedThe technician works the plate free, cleans the seat and checks whether the frame is sound. Sometimes that is the whole job.
Cleaned and re-seatedRust and debris are cleared off the plate and the frame so it closes flat and opens fully. A damper that does not seat still leaks heat.
Handles, pivots and hardware replacedCorroded pivots and broken handles are swapped out so the damper works from the firebox again.
A top-sealing damper where the old one is beyond repairIf the throat damper cannot be saved, a top-sealing damper can be fitted at the top of the flue instead. It seals against the crown and is operated by a cable from the firebox.
Flue swept while it is openWith access gained and the damper out of the way, the flue is swept so soot and creosote are not sitting above your repair.
A cap fitted to stop the waterA cap keeps the rain out of the flue, which is what rusted the damper in the first place.

Why this happens in New Rochelle, NY

Homes on Davenport Neck, Premium Point and the other Sound-front streets deal with constant salt-air corrosion on chimney caps and flashing. Once the cap is gone or the flashing fails, rain falls straight down onto the smoke shelf and the damper plate sits in it. That is why so many stuck dampers in New Rochelle are rust, not mechanical failure.

Much of the housing here predates 1960, and masonry chimneys with clay flue liners are widespread in those pre-war colonials, Tudors and brick houses. Across New York, winter freeze-thaw is hard on crowns, mortar joints and brick faces, and humid summers keep an unused flue damp. Work tends to pile up at the first hard freeze, when the fireplace gets its first real test of the season, and again after fall nor'easters. If your damper is stiff, late summer or early fall is an easier time to deal with it than January.

Questions people ask

How do I tell if my damper is open or shut?: With a flashlight and no fire burning, look up through the firebox. You should see an open throat and daylight or the flue above it, not a flat steel plate. If you cannot tell, leave the fireplace alone until someone has looked at it.
My damper is stuck open. Is that urgent?: It is not a smoke hazard, but it costs you heat. A damper stuck open vents warm air up the chimney through every cold New Rochelle winter, and cold air drops back down into the room.
Why does this keep happening to chimneys near the water?: New Rochelle's frontage on Long Island Sound means salt-laden air and high humidity, which accelerates rust on chimney caps and flashing. Once those fail, water gets into the flue and goes to work on the damper. Fitting a cap is usually part of fixing the damper properly.
Do I need a permit for this in New Rochelle?: Permits in New York are issued locally, by the municipal building department and code enforcement officer, not by a state agency. Routine sweeping and inspection generally do not need one, but structural masonry work above the roofline usually does. Call the local building department before work begins.
Is there a state license for chimney work in New York?: New York does not issue a statewide chimney sweep or chimney inspection license. Westchester County runs its own home improvement contractor licensing program, so verify current requirements with the county consumer affairs or licensing office. You can always ask the technician for their reasoning in writing and to show you what they found.

One call

One call to (866) 576-7943 and we arrange the visit with an independent sweep or mason — we schedule the work, we are not the contractor. The estimate is free: the technician inspects the chimney, gives you the price, and you approve it before any work starts.

Call now · (866) 576-7943

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