The short answer
Chimney rebuilding means removing damaged brick and mortar down to solid masonry and relaying it with a new crown, flashing and, if needed, a new flue liner. It is the right choice when cracks, leaning, loose bricks or ongoing leaks have gone past what repointing or patching can fix. An inspection decides how much of the stack has to come down.
A chimney takes more weather than almost any other part of a house. In Brooklyn, freeze-thaw cycles, wind-driven rain and years of flue gases slowly break down mortar joints and brick until the stack starts to crack, lean or shed pieces. When repointing and patching can no longer hold it together, the fix is rebuilding: taking the damaged masonry down to sound brick and laying it back up correctly, with a proper crown and flashing. All Star Chimney Sweep rebuilds chimneys for homeowners in Brooklyn and nearby areas, from a few courses above the roofline to a full stack. This page explains when rebuilding makes sense, what the work includes, how our certified technicians protect your home, and what to expect from the first call to the final walkthrough.
Signs you need it
Most chimneys give plenty of warning before they need rebuilding. The trouble usually shows up first inside the fireplace or on the brick you can see from the yard or the street. If you notice any of the signs below, schedule an inspection before the next heating season rather than waiting for a brick to come loose.
One sign on its own does not always mean a rebuild. White staining or a little water might be solved with a new crown or flashing. When several of these appear together, the masonry itself is usually failing.
- Debris, brick flakes or crumbled mortar collecting in the firebox
- Water in the firebox or damp spots on the walls or ceiling around the chimney
- White staining on the brick, a sign that water is moving through the masonry
- Cracked, spalling or missing bricks, or mortar joints you can scrape out with a key
- A stack that leans, bows or has pulled away from the house
- Poor draft or smoke coming back into the room, which can mean a blocked or damaged flue
- A lingering smoke or creosote smell, especially in humid weather
What's included
Every rebuild starts with an inspection, because the scope depends on how far down the damage goes. Once we know where the sound brick begins, we give you a written scope that lists exactly what will be removed and replaced. A typical rebuild includes:
- Inspection of the stack, crown, flashing and flue, including a camera inspection of the flue where it is needed
- Careful removal of damaged brick and mortar down to solid masonry
- New brick and mortar chosen to match the existing chimney as closely as practical
- A new sloped crown that sheds water away from the brick
- New or resealed flashing where the chimney meets the roof
- Chimney cap and screen installed or reset to keep out rain and animals
- Flue cleaning and, where needed, a new or repaired liner
- Debris removal, cleanup and a final walkthrough with photos of the finished work
How our crew works in your home and on your roof
Inside, we lay drop cloths from the door to the fireplace and seal the fireplace opening before any work starts above. Rebuilding loosens soot and mortar dust inside the flue, so we run HEPA vacuums at the firebox to capture fine particles instead of letting them drift into the room. When the flue needs cleaning, we use rotary brushes sized to the flue, and we run a camera up the flue to check the liner before and after the work.
On the roof, we set up safe access and protect shingles and gutters around the chimney. Old brick and mortar come down in controlled sections, not dropped onto the roof or yard. We lay new courses level and plumb, tool the joints, and form the crown so water runs off instead of soaking in. At the end of each day the opening is covered so rain cannot get into the flue or the house.
Time for your annual chimney check?
The standard we follow
Our chimney work follows NFPA 211, the standard that calls for chimneys, fireplaces and vents to be inspected once a year. Chimney professionals use three inspection levels. Level 1 applies when nothing about the system has changed. Level 2 applies when the system changes, such as a new appliance or a switch of fuel, or when the home is sold. Level 3 applies when a hidden hazard has to be reached by opening part of the chimney or building.
A rebuild usually calls for at least a Level 2 inspection, and sometimes Level 3 if damage is suspected inside walls or behind the chase. If your building is converting its boiler from oil to gas, keep in mind that New York City requires the chimney to be evaluated as part of the job, and a new liner is often needed because gas exhaust produces acidic condensate that can corrode a masonry flue.
What affects the price
We price each rebuild after inspecting it, because no two chimneys fail the same way. The main factors are:
- Height of the chimney and how easy the roof is to reach and work on
- How much of the stack has to come down, from a few top courses to the full chimney
- Fuel type, since wood, oil and gas each place different demands on the flue
- Flue size and condition, and whether a new liner is needed
- How much creosote or soot buildup has to be cleaned first
- Whether a camera inspection, flashing replacement or other repair is part of the job
How a visit works
When you call, we ask what you have noticed and set a time for an inspection. Our technician examines the chimney from the roof and the fireplace, scopes the flue if needed, and shows you photos of what we find. You then get a written scope that explains what needs to be rebuilt and why.
Once you approve the work, we schedule the rebuild for dry weather. Many homeowners plan it before New York City's heat season, which runs from October 1 through May 31, so the chimney is ready when the heat comes on. On work days we protect your home, keep the site tidy and cover the chimney overnight. When the work is done, we clean up, walk you through the finished chimney, and share before-and-after photos for your records.
