Duct Sealing in Brooklyn - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Brooklyn

Duct sealing in Brooklyn typically costs $800 – $2,400 for a whole-home system, with most jobs running $1,200 – $1,800 depending on access, duct condition, and whether we’re working with original pre-war galvanized steel or newer flex duct. We’re Hollis Air Duct Cleaning, part of the Garrison Partners family, and our Duct Sealing in Brooklyn crews know the difference between a standard suburban job and what it takes to seal ducts in a Park Slope brownstone with gravity furnace octopus ductwork from the 1920s. Our New York City office coordinates dispatch and scheduling for Brooklyn homeowners, and we arrive inside the quoted window with a written price before any work starts. Call (361) 326-5060 for a free estimate.

Call (361) 326-5060

Why Hollis Air Duct Cleaning Is Brooklyn’s Preferred Duct Sealing Company

We’ve been in business since 2004, and the Garrison Partners family has built a reputation on The Garrison Standard: written prices, written guarantees, and a 365-Day Done Right Promise that competitors rarely match in writing. In Brooklyn, that standard matters more than in most markets because the housing stock here punishes shortcuts.

Our technicians are background-checked and uniformed; you’ll know who’s walking into your home before they arrive. We price every duct sealing job in writing before we touch anything, and that price does not move at the door. If our repair fails within a year, we return and make it right at no charge, including a free second visit. Phones are answered by a live person 24 hours a day, 7 days a week.

We don’t compete on the lowest teaser price. We compete on discipline: show up when we said, price it before we touch it, do it by the book. Brooklyn homeowners from Bay Ridge to Bed-Stuy have learned the difference.

Duct Insulation in Brooklyn

Duct Insulation in Brooklyn is often the missing piece in homes where the ducts are technically sealed but still bleeding conditioned air into unheated basements, crawl spaces, or wall cavities. In pre-war walk-ups from Williamsburg to Crown Heights, we’ve found that even properly sealed galvanized steel runs lose 20 – 30% of their thermal energy through the metal itself, especially where ducts pass through exterior walls or run through damp basement environments. A typical duct insulation job in Brooklyn runs $600 – $1,800 depending on linear footage and access difficulty.

Condensation Control in Humid Basements

Brooklyn’s summer humidity, combined with basement flooding history in neighborhoods like Gowanus and Red Hook, creates condensation on cold duct surfaces that insulation eliminates. We use foil-faced fiberglass or closed-cell foam wraps rated for HVAC applications, not the hardware-store duct tape jobs we’ve seen fail within a season.

Sound Dampening in Multi-Family Buildings

In Brooklyn’s dense multi-family housing, insulated ducts carry less mechanical noise between units. We’ve insulated supply runs in Park Slope brownstones where the original metalwork transmitted every furnace cycle to the garden apartment below.

HVAC Duct Sealing in Brooklyn

Our Duct Sealing in Brooklyn addresses the leaks, gaps, and disconnected joints that force your system to overwork while pulling unconditioned air from basements, wall cavities, and even rodent pathways into your living space. In a borough where many buildings still run on ductwork installed before World War II, sealing is rarely a simple mastic-and-go operation. Typical HVAC duct sealing in Brooklyn costs $800 – $2,400 for whole-system work, with partial repairs on accessible basement runs starting around $400 – $700.

Mastic Sealing vs. Tape Repairs

We seal with water-based duct mastic reinforced with fiberglass mesh, not foil tape that peels in Brooklyn’s humidity. Mastic remains flexible, fills irregular gaps in pitted galvanized steel, and lasts 20+ years when applied to clean, prepared surfaces.

Pressure Testing After Sealing

Every sealed system gets a pressure test to verify results. We measure static pressure and airflow at registers before and after, so you see the improvement in CFM delivery, not just a bill for materials.

Trusted Brands We Service in Brooklyn

Our Duct Sealing crews arrive with professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration products from Honeywell and Aprilaire that we stock for Brooklyn customers needing upgrades after their ducts are sealed. We don’t use hardware-store gear. Rotobrush rotary brush systems handle the soft agitation needed for fragile pre-war ducts; Nikro negative-air machines maintain containment during messy jobs; Abatement Technologies HEPA filtration captures the fine particulate that standard shop vacs recirculate. For Brooklyn homeowners with forced-air systems, we carry Honeywell and Aprilaire media filters and can recommend the right MERV rating for your building’s airflow constraints after sealing is complete.

Common Duct Sealing Problems We See in Brooklyn Homes

• Salt-corroded seams in Coney Island and Sheepshead Bay. Coastal salt air attacks galvanized steel duct collars and joint seams from the outside in. We see paper-thin metal that looks sealed until pressure testing reveals pinhole leaks across entire runs. Sealing over corrosion without cleaning first traps existing mold spores and guarantees failure within a season.
• Asbestos-taped joints in Park Slope and Brooklyn Heights brownstones. Original gravity furnace ductwork often carries crumbling asbestos tape that cannot be disturbed without proper containment. Our technicians set up negative pressure and HEPA filtration before touching these runs, then seal with modern mastic after source removal.
• Basement flood moisture feeding mold inside sealed ducts. Brooklyn’s heavy rainstorms flood basements regularly, and sealed ductwork in damp environments becomes a condensation trap. We identify active moisture sources before sealing, because a tight duct with wet interior surfaces grows mold faster than a leaky one.
• Gravity furnace conversions with mismatched duct sizing. When original octopus ductwork gets retrofitted for forced air, the oversized runs create turbulent airflow and poor distribution. Sealing alone won’t fix this; we often recommend partial duct modification with insulation to restore proper static pressure.

Pricing for Duct Sealing in Brooklyn, NY

We Also Serve Cities Near Brooklyn

Our crews work throughout the five boroughs and beyond. We regularly travel to Brooklyn from our New York City dispatch office, and we also serve Manhattan, Staten Island, Bronx, and Mount Vernon with the same written pricing and 365-Day Done Right Promise.

FAQs About Duct Sealing in Brooklyn