The short answer
Gowanus homeowners should have chimneys swept and inspected once a year, as the NFPA 211 standard calls for, ideally before the heating season starts. Our certified technicians, based locally on Henry Street, clean wood-burning fireplaces and heating flues in brownstones, rowhouses and pre-war buildings and report on the chimney's condition.
Gowanus homes include brownstones, rowhouses, pre-war apartment buildings and newer construction, and many of them share chimneys and flues that have served several generations of heating equipment. All Star Chimney Sweep is based in the neighborhood, at our office at 543 Henry St, so our certified technicians can reach homes across the 11231 ZIP code without a long trip. A chimney sweep removes the soot, creosote and debris that build up inside a flue, then checks whether the chimney is still safe to use. This page explains what that involves for Gowanus homes and when to schedule it.
What a Chimney Sweep Covers in a Gowanus Home
A sweep is more than running a brush up the flue. We protect the room around the fireplace or appliance, clean the flue from the firebox or the roof, and remove the debris. Then we look at the parts of the system that affect safety and draft.
In older Brooklyn masonry, problems often come from age rather than heavy use. Mortar joints wear, clay tile liners crack, and dampers rust shut. A fireplace that has sat unused for years can also hold nesting material or fallen debris that blocks the flue.
- Removal of soot and creosote from the flue walls
- Check of the firebox, smoke chamber and damper
- Look for blockages such as nests, leaves or fallen masonry
- Visual review of the liner where it can be seen
- Exterior check of the crown, cap and visible brickwork
- A plain-language summary of what we found and any repairs to consider

Yearly Inspections and the NFPA 211 Standard
The NFPA 211 standard calls for chimneys, fireplaces and vents to be inspected once a year. Chimney professionals use three inspection levels. A Level 1 inspection fits when nothing about the system has changed. A Level 2 inspection applies when the system changes, such as a new appliance or a switch of fuel, or when the home is sold. A Level 3 inspection is used when a hidden hazard has to be reached by opening part of the chimney or building.
Most Gowanus homeowners who use their fireplace or heating system as usual need a yearly sweep with a Level 1 inspection. If you are buying or selling a brownstone or rowhouse, or you have replaced your boiler or furnace, ask us about a Level 2 inspection.
Heating Flues, Boilers and Oil-to-Gas Conversions
Many chimneys in pre-war Brooklyn buildings vent a boiler or furnace, not just a fireplace. These flues also need regular attention, because a blocked or damaged heating flue can push exhaust back into the building.
When a New York City building converts its boiler from oil to gas, the chimney has to be evaluated as part of the work. A new liner is often needed, because gas exhaust produces acidic condensate that can corrode a masonry flue. If your building has converted, or a conversion is planned, we can sweep and inspect the flue so you know where the liner stands before the new equipment runs for a full season.
Time for your annual chimney check?
When to Schedule a Sweep in Gowanus
New York City's heat season runs from October 1 through May 31, when building owners must keep apartments heated to the city's minimum temperatures. For owners of multi-unit buildings, a heating flue problem in the middle of that period is hard to work around. Late summer and early fall are the most practical times to book, so any repairs can be finished before the boiler runs steadily.
Fireplace owners benefit from the same timing. A clean, inspected chimney in early fall means you can light the first fire of the season without worrying about a blocked flue.
- Book before October if the chimney serves a boiler or furnace
- Schedule after buying a home with a fireplace you have not used yet
- Call if you notice smoke entering the room, strong odors or falling debris
- Have the flue checked after any change in heating equipment or fuel
Serving Gowanus and Nearby Brooklyn Neighborhoods
Because our office is in Gowanus, we work in homes throughout the 11231 ZIP code and in the surrounding neighborhoods of Carroll Gardens, Cobble Hill, Red Hook, Park Slope and Brooklyn Heights. Housing across this part of Brooklyn is similar, with brownstones, rowhouses, pre-war apartment buildings and some detached homes, so the chimney issues we see tend to repeat from block to block.
Whether you own a single-family rowhouse with one working fireplace or manage a building with a shared heating flue, our certified technicians will explain what your chimney needs and what can wait.
More services in Gowanus
- Chimney Inspection in GowanusLocal service & repairs
- Chimney Repair in GowanusLocal service & repairs
- Air Duct Cleaning in GowanusLocal service & repairs
- Chimney Liner Installation in GowanusLocal service & repairs

