The short answer
A chimney needs rebuilding when the masonry has deteriorated past what repointing or patching can fix, such as loose or spalling brick, a leaning stack, or a cracked crown that lets water in. EverSafe's certified crew takes the damaged section down to sound brick, rebuilds it with a new crown and flashing, and inspects the flue before you use it again.
Brick chimneys take a beating from freeze-thaw cycles, wind-driven rain, and the acidic exhaust of the appliances that vent through them. When the damage goes beyond a few loose mortar joints, patching stops working and the chimney has to be partly or fully rebuilt. EverSafe Chimney Sweep rebuilds chimneys for homeowners in Brooklyn and nearby cities. A job can be as small as the top few courses above the roofline or as large as the full stack, depending on the structure. This page explains how to tell when rebuilding is needed, what the work includes, how our crew protects your home, and how a job runs from the first visit to the final check.
Signs You Need It
Most homeowners notice chimney damage from inside the house first, long before anyone looks at the roof. Masonry that has absorbed water for years starts to break apart from the inside out, and the symptoms show up in the firebox, on the walls, and in how the fireplace or appliance behaves. If you see any of the signs below, schedule an inspection before the next time you use the chimney.
A stack that leans, has visible gaps between bricks, or sheds pieces onto the roof or yard should not be used until it has been looked at. Loose masonry can fall, and damaged flue walls can let heat and exhaust reach parts of the house they should never touch.
- Brick flakes, crumbled mortar, or other debris landing in the firebox
- White, chalky staining on the outside or inside brick, a sign that water is moving through the masonry
- Water in the firebox or damp spots on the ceiling or walls near the chimney
- Poor draft, with smoke rolling into the room instead of rising up the flue
- A smoke or creosote smell that lingers, especially in humid weather
- Bricks that are cracked, missing, or popping their faces off
- A stack that visibly leans or pulls away from the house
What Is Included
Every rebuild is scoped after an inspection, so the exact work depends on how far down the damage goes. A typical rebuild covers the following:
- Inspection of the stack, crown, flashing, and flue, including a camera inspection of the flue where needed
- Careful teardown of damaged brick down to sound, stable masonry
- Rebuilding with brick and mortar chosen to match the existing chimney as closely as possible
- A new chimney crown shaped to shed water away from the flue and brick
- New or resealed flashing where the chimney meets the roof
- Evaluation of the flue liner, with repair or replacement recommended if it is cracked or unsuitable for your appliance
- Installation of a chimney cap to keep out rain, debris, and animals
- Cleanup of the roof, yard, and work area, plus a final check of the finished chimney
How Our Crew Works Inside Your Home and on the Roof
Most of a rebuild happens outside, but our certified technicians still treat the inside of your home with care. Before any work starts, we lay drop cloths from the entry to the fireplace and seal the fireplace opening so dust and mortar stay in the flue. HEPA vacuums run during any work that can stir up soot, and we use rotary brushes to clean the flue so the camera can show the true condition of the liner and inner masonry.
On the roof, the crew sets up safe access with ladders or staging suited to the height and pitch of your house. Bricks are removed by hand and lowered in buckets or bags rather than thrown, which protects your roof, gutters, and landscaping. Mortar is mixed in small batches so it cures properly, and new brick is laid course by course to keep the stack plumb. At the end of each day, open work is covered to keep rain out of the chimney and the house.
The Standard We Follow
We work to NFPA 211, the national standard for chimneys, fireplaces, and vents. It calls for these systems 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.
Rebuilding often reveals conditions that cannot be seen from the outside, so we document what we find as the old masonry comes down. If your home is converting a boiler from oil to gas, keep in mind that in New York City the chimney has to be evaluated as part of that work. A new liner is often needed, because gas exhaust produces acidic condensate that can corrode a masonry flue. Pairing a rebuild with a liner job can save a second round of roof work.
What Affects the Price
Because no two chimneys are alike, we quote each rebuild after an inspection. These are the main factors that shape the cost:
- The height of the chimney and how hard the roof is to reach and work on
- How much of the stack has to come down, from a few top courses to a full rebuild
- The type of fuel and appliance the chimney serves
- Flue size and condition, and whether the liner needs repair or replacement
- How much soot or creosote buildup has to be cleaned before inspection
- Whether a camera inspection or additional repairs, such as flashing or crown work, are needed
How a Visit Works
The first visit is an inspection. A technician looks at the chimney from the roof and from inside, cleans and scans the flue where needed, and explains what we found in plain terms. You get a written scope of work that shows how much of the chimney needs rebuilding and why.
Once you approve the work, we schedule the rebuild around the weather, since mortar needs dry conditions and moderate temperatures to cure well. New York City's heat season runs from October 1 through May 31, so homeowners who rely on the chimney for heating often prefer to plan the work outside that window. When the rebuild is finished, we inspect the flue again, walk you through the results, and tell you when it is safe to use the chimney.