The short answer
ClearStack Chimney Service works out of an office at 7421 13th Ave in Dyker Heights and serves the 11228 ZIP code and nearby Brooklyn neighborhoods. We handle chimney sweeping, inspection, repair, liners, waterproofing, caps, and air duct and dryer vent cleaning for local houses and apartment buildings.
ClearStack Chimney Service is based right here in Dyker Heights, at 7421 13th Ave, so homes in the 11228 ZIP code are in our own neighborhood. Our certified technicians sweep, inspect and repair chimneys, install liners, and clean air ducts and dryer vents throughout the area. Dyker Heights has a mix of housing: detached single-family homes, semi-attached and two-family houses, rowhouses, and pre-war apartment buildings. Each type puts different demands on a chimney or vent. Below is what we see most often in local homes and how we handle it.
How Brooklyn Weather Wears Down a Chimney
Water does most of the damage to chimneys here. Brooklyn winters swing above and below freezing again and again. Moisture that soaks into brick and mortar freezes, expands, and slowly pushes the masonry apart. Nor'easters drive rain sideways into crowns and joints. Humid summers can leave a damp, musty smell around the fireplace.
Many chimneys in Dyker Heights have been through decades of these cycles. We look at the crown, the mortar joints, the flashing where the chimney meets the roof, and the cap or chase cover on top. Small fixes like repointing, a new cap, or a breathable waterproofing treatment can head off larger chimney repair or rebuilding later.
- Loose, crumbling or missing mortar between bricks
- Cracked or chipped chimney crown
- White staining (efflorescence) on brick, inside or out
- Water stains on ceilings or walls near the chimney
- Rust on the damper or firebox parts
- A missing or damaged chimney cap

Oil-to-Gas Conversions and Chimney Liners
Many Dyker Heights houses and apartment buildings have switched, or plan to switch, from oil heat to gas. 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. Gas exhaust produces acidic condensate that can corrode a masonry flue that was built for oil.
We inspect the flue, check whether it is sized and lined correctly for the new appliance, and install a chimney liner when one is needed. If you are planning a conversion, bring us in early so the chimney work fits your boiler schedule.
Annual Inspections 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 when nothing about the system has changed. A Level 2 inspection applies when something 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.
New York City's heat season runs from October 1 through May 31. During that time, building owners must keep apartments heated to the city's minimum temperatures. For owners of two-family homes and apartment buildings, late summer and early fall are the practical time to sweep and inspect, before the boiler runs every day.
Time for your annual chimney check?
Dryer Vents and Air Ducts
According to the U.S. Fire Administration, failure to clean is the leading factor contributing to clothes dryer fires in homes. In rowhouses and attached homes, dryer vents often run long distances or take several turns to reach an outside wall. That lets lint build up. We clean the full run of the vent and check the exterior hood.
For air duct cleaning, 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 notes that duct cleaning has not been shown to prevent health problems. It also urges caution with chemical treatments, so we explain what we see and let you decide.
Neighborhoods We Serve Near Dyker Heights
From our 13th Avenue office, we also serve nearby Bay Ridge, Bensonhurst, Borough Park, Bath Beach and Sunset Park. Our services include chimney sweeps, inspections, repairs, liner installation, caps and chase covers, waterproofing, fireplace and damper repair, chimney rebuilding, air duct cleaning, and dryer vent cleaning.
ZIP codes we serve
- 11228
Services in Dyker Heights
- Chimney Sweep in Dyker Heights
- Chimney Inspection in Dyker Heights
- Chimney Repair in Dyker Heights
- Air Duct Cleaning in Dyker Heights
- Chimney Liner Installation in Dyker Heights

