Leaky Ductwork in Ardsley Homes — Signs, Costs, and Fixes

Up to 30% of conditioned air leaks before reaching your Ardsley living space. Here's how to find duct leaks, what sealing costs, and the rebates available.

Published 2025-12-16 · Bravo Mechanical, Westchester County, NY

Ardsley (10502) homes — particularly the 1950s–1970s split-levels and ranches that dominate the village — almost universally have leaky ductwork. Industry studies put typical leakage at 20–35% of system airflow. That's hundreds of dollars per year in wasted utility bills.

Signs of leaky ductwork in your Ardsley home

• Some rooms 5°F warmer or cooler than others (no zoning)
• Dusty rooms even after cleaning
• Basement or attic noticeably "warmed" or "cooled" by the system
• HVAC runs constantly but house never quite reaches setpoint
• High utility bills relative to neighbors
• Visible disconnected joints, gray cloth tape, or dust streaks at joints

Where Ardsley ducts typically leak

1. At the air handler cabinet — manufacturer panels rarely seal well 2. At trunk-to-branch takeoffs — flex duct pulled loose, no mastic 3. Boot connections (where duct meets register) — gypsum dust falls into the gap 4. Plenum corners — sheet metal screws back out over time 5. Old flex duct — inner liner tears, outer jacket holds shape (looks fine but leaks)

How to test (DIY-ish)

• Smoke pencil at every visible joint with system running
• Hand-feel suspected joints — leaking air feels obvious
• Pull supply registers and look at the boot-to-drywall seal

For a real number, hire a pro to do a duct blaster test (~$350–$550 in Ardsley).

Sealing options ranked by effectiveness

Manual mastic sealing — gold standard

A tech accesses each visible joint and applies fibrous mastic by brush. $650–$1,500 for a typical Ardsley split-level.

Aeroseal (sprayed in from inside)

Pressurizes the duct system with aerosolized sealant that finds and seals leaks from the inside. Great for inaccessible ducts. $1,800–$3,500.

Replace flex with rigid

For homes with collapsed/torn flex duct, replacement is sometimes the only fix. $2,500–$6,000+.

Rebates in Ardsley

• Con Edison Energy Conscious Building — partial rebates for documented duct sealing
• NYS Comfort Home — duct sealing qualifies as part of envelope improvement, $1,000–$3,000+ depending on scope
• Pairs perfectly with insulation upgrades for max rebate stacking

What you'll feel after sealing

• More consistent room temperatures
• Faster recovery to setpoint
• 10–25% lower utility bills (highly variable)
• Less dust
• Quieter system (reduced static pressure)

Book an Ardsley duct assessment or call (914) 318-7368.

Request service or a free written estimate or call (914) 361-9142. Serving all of Westchester County, NY.