Do I need a permit for this in New York City?

Permits for chimney work are issued locally, and in New York City that is the Department of Buildings rather than any state agency. Structural masonry work such as rebuilding a chimney above the roofline typically requires one, while routine sweeping and inspection generally do not. Call the local building department before work begins.

Is there a state chimney licence I should ask about?

New York does not issue a statewide licence for chimney sweeping, inspection or masonry repair. In New York City, contractors need a Home Improvement Contractor licence through the NYC Department of Consumer and Worker Protection. You can verify current requirements with that office for the work you are having done.

Can the crown just be patched?

Sometimes, and sometimes the crown needs recasting with a proper overhang and drip edge. It depends on how deep the cracking goes and what the mortar joints and brick below look like. Ask the technician for the reasoning in writing so you can see why they landed where they did.

The fireplace was sealed years ago. Does the crown still matter?

Yes. Many original New York fireplaces were sealed or converted, but the stack often still vents gas or heating appliances, and water getting into the masonry damages it either way. A cracked crown on an unused flue also keeps the flue damp, which encourages odours and interior staining.

What does One Call Chimney actually do?

We are a referral and scheduling service. We arrange the work with independent sweeps and masons who cover New York — we are not the contractor and we do not perform the work ourselves. You are free to ask the technician who comes out about their own licensing and insurance.

Cracked crown or crumbling brick in New York, NY

You have looked up, or someone has told you, and the top of the chimney is cracked and brick is coming off. That concrete slab on top of the stack is the crown. Its job is to shed water away from the flue and the brickwork. Once it splits, water runs straight into the masonry instead of off it.

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In New York that damage moves fast. Water soaks into the crown and the mortar joints, then freezes. Freeze-thaw cycles run roughly December through March here, and each one opens the crack a little wider. The city is coastal too, so salt air and heavy winter road salt work on exposed masonry. A hairline crack in the fall can be a face of spalled brick by spring, and a stack that has lost structure is a rebuild rather than a patch.

While you wait — please don't

Keep people away from the base of the chimney. Falling brick is a real hazard at ground level, and in New York that often means a sidewalk, an alley or a neighbour's yard below.
Do not use the fireplace if brick or mortar has fallen inside the flue. Debris in the flue can block the draft and push smoke and carbon monoxide back into the room, so stop using it until someone has looked up the chimney.
Get out and call 911 if anyone feels dizzy, sick or has a headache with the fire lit. Those can be carbon monoxide symptoms, and you do not wait inside to work out whether they are.
Do not go up on the roof yourself. A leaning stack or one with open gaps is structural, and leaning a ladder against it or standing on it can bring it down.
Do not smear sealant over the crack and leave it. Surface patching traps moisture in the masonry and hides how far the damage has already gone.

What the technician does

The technician looks at the whole stack, not just the crackThey check the crown, the mortar joints, the brick faces and whether the stack is still plumb above the roofline. That is what decides between a repair and a rebuild.
The crown is repaired or recastA new crown is formed with an overhang and a drip edge so water is thrown clear of the brickwork instead of running down it.
Open joints are repointedOld mortar is cut out and new mortar is matched to the existing work, which matters on the brick and brownstone buildings that make up so much of New York's housing stock.
Spalled brick is cut out and replacedWhere the face has flaked off and the brick is soft, those units come out and new ones go in. Patching over a failed brick does not hold.
A cap is fittedA cap keeps rain and snow off the flue opening, which is the same water that cracked the crown in the first place.
Rebuild above the roofline where neededIf the stack has lost structure or is leaning, the section above the roof is taken down and rebuilt. You get the reasoning for that before anyone starts.

Why this happens in New York, NY

Much of the housing here predates 1940 — brick and brownstone rowhouses, masonry walk-ups and prewar apartment buildings. Chimney liners, parapets and mortar joints on those buildings are a constant maintenance item, and many original fireplaces have been sealed or converted to gas or to heating-flue use. That matters for crown work, because a chimney you never light may still be venting a furnace or a boiler, and the masonry still has to keep water out.

Season matters too. Exterior masonry rebuilding and repointing concentrate in the warmer months, when mortar can cure without freezing. Demand across New York spikes with the first hard freeze and the start of heating season in late fall, and again after winter nor'easters push wind-driven rain into the brickwork. If you have spotted a cracked crown now, getting it looked at before the next freeze cycle is the practical move, whether you are in Bay Ridge, Riverdale, Forest Hills or St. George on Staten Island.

Questions people ask

Do I need a permit for this in New York City?: Permits for chimney work are issued locally, and in New York City that is the Department of Buildings rather than any state agency. Structural masonry work such as rebuilding a chimney above the roofline typically requires one, while routine sweeping and inspection generally do not. Call the local building department before work begins.
Is there a state chimney licence I should ask about?: New York does not issue a statewide licence for chimney sweeping, inspection or masonry repair. In New York City, contractors need a Home Improvement Contractor licence through the NYC Department of Consumer and Worker Protection. You can verify current requirements with that office for the work you are having done.
Can the crown just be patched?: Sometimes, and sometimes the crown needs recasting with a proper overhang and drip edge. It depends on how deep the cracking goes and what the mortar joints and brick below look like. Ask the technician for the reasoning in writing so you can see why they landed where they did.
The fireplace was sealed years ago. Does the crown still matter?: Yes. Many original New York fireplaces were sealed or converted, but the stack often still vents gas or heating appliances, and water getting into the masonry damages it either way. A cracked crown on an unused flue also keeps the flue damp, which encourages odours and interior staining.
What does One Call Chimney actually do?: We are a referral and scheduling service. We arrange the work with independent sweeps and masons who cover New York — we are not the contractor and we do not perform the work ourselves. You are free to ask the technician who comes out about their own licensing and insurance.

One call

One call to (866) 576-7943 and we arrange for an independent sweep or mason to come out and look at your chimney, and the estimate is free on every job. The technician inspects the chimney and gives you the price first, and nothing starts until you approve it.

Call now · (866) 576-7943

Something else in this area

One Call Chimney arranges the visit; the technician does the work and gives you the price.