The short answer
Yes, ClearStack Chimney Service serves Flatbush (ZIP 11226), about 3 miles from our Dyker Heights office. Our certified technicians handle chimney sweeping, inspection, repair, liners and waterproofing, plus dryer vent and air duct cleaning, for the neighborhood's houses and apartment buildings.
ClearStack Chimney Service sends certified technicians to Flatbush homes and buildings throughout the year. Flatbush is about 3 miles northeast of our office in Dyker Heights, so ZIP code 11226 is a short trip across Brooklyn for our crew. The neighborhood has a wide mix of housing, from detached homes with working fireplaces to rowhouses, brownstones and pre-war apartment buildings that rely on boiler chimneys. Each of those systems ages differently, so we fit sweeping, inspection and repair work to the building in front of us instead of using one checklist for every job.
Chimneys in Flatbush's Mix of Older Homes
Many Flatbush houses were built long before modern venting standards, and their chimneys have seen decades of use. In detached homes, a fireplace chimney often runs alongside a separate flue for the furnace or boiler, and both need attention. Older masonry flues may be unlined or may have clay tile liners that have cracked over time. Those cracks can let heat and exhaust reach the wood framing around the chimney.
Rowhouses and brownstones bring their own issues. Because these homes share party walls, a deteriorating flue can affect the house next door. Some original fireplaces were sealed up years ago and later reopened without a proper check. In pre-war apartment buildings, the main concern is usually the boiler chimney, which carries exhaust from the heating plant all season long.

How Brooklyn Weather Wears Down Masonry
Brooklyn winters often swing above and below freezing in the same week. Rain or melting snow soaks into brick and mortar, then freezes and expands, which pushes the masonry apart. Over several winters, that cycle loosens bricks, cracks crowns and opens gaps that let in even more water. Coastal storms and wind-driven rain add to the problem, and humid summers can keep a damp chimney from drying out.
A properly fitted chimney cap, a sound crown or chase cover, and a breathable waterproofing treatment slow that damage considerably. Watch for these signs that water is getting in:
- White, chalky staining on the outside brick
- Crumbling or missing mortar joints
- Rust on the damper, firebox or chimney cap
- Water stains on ceilings or walls next to the chimney
- Flakes of tile or masonry falling into the fireplace
Inspections, Sweeping and the Heating Season
The NFPA 211 standard calls for chimneys, fireplaces and vents to be inspected once a year. A Level 1 inspection fits most homes where nothing has changed. A Level 2 inspection is the right choice when you add a new appliance, switch fuels, or buy or sell a home. A Level 3 inspection is needed only when a suspected hazard is hidden and part of the chimney or building has to be opened to reach it.
Timing matters for building owners. New York City's heat season runs from October 1 through May 31, and during that period owners must keep apartments heated to the city's minimum temperatures. If you schedule inspection, sweeping and repairs in late spring or summer, you have time to fix problems before the boiler has to run steadily.
If your building is converting 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 an old masonry flue. We assess the existing flue and install a correctly sized liner when one is required.
Time for your annual chimney check?
Dryer Vent and Air Duct Cleaning
According to the U.S. Fire Administration, failure to clean is the leading factor contributing to clothes dryer fires in homes. Long or crowded vent runs collect lint quickly, and they are common where laundry was added to an older house or apartment later on. If clothes take longer than usual to dry or the laundry area feels hot, the vent likely needs cleaning.
For air ducts, we follow the U.S. EPA's guidance. Cleaning makes sense when there is substantial visible mold growth, vermin, or excessive dust and debris. The EPA also notes that duct cleaning has not been shown to prevent health problems, so we won't tell you it will. We explain our process before we start. We use chemical treatments only when there is a clear reason for them and you understand what is being applied.
Services in Flatbush and Nearby Neighborhoods
We offer our full range of services in Flatbush and in the nearby neighborhoods of Ditmas Park, Parkville, Kensington, Midwood and Mapleton.
Every visit ends with a plain explanation of what we found and what, if anything, needs attention, so you can decide on next steps.
- Chimney sweep for fireplaces, wood stoves and heating flues
- Chimney inspection at the level your situation calls for
- Chimney repair for brick, mortar and crowns
- Chimney liner installation, including for oil-to-gas conversions
- Chimney cap and chase cover installation
- Chimney waterproofing
- Fireplace and damper repair
- Chimney rebuilding when masonry is beyond repair
- Dryer vent cleaning
- Air duct cleaning
ZIP codes we serve
- 11226

