Duct Sealing in Newark - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Newark

Duct sealing in Newark typically costs $800 – $2,400 for a whole-home system, depending on whether we’re sealing accessible trunk lines or chasing disconnected runs behind finished ceilings. Most Newark jobs take one day, though pre-1950 rowhouses in the Ironbound often need degreasing first, which adds half a day. Call (361) 326-5060 for a written estimate before any work starts.

Call (361) 326-5060

We’ve been crawling through Newark’s attics and basements since 2004. Our crews know the difference between a post-war high-rise riser system off Broad Street and the original galvanized trunk lines running through pre-1950 brick rowhouses near Ferry Street. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, but the technicians who show up at your door live and work in this corridor. They understand why a standard duct sealing job in Fremont or Sunnyvale looks nothing like what we find in the Ironbound, where restaurant exhaust bonds grease to metal that sealant won’t stick to without prep.

When you call Hollis, a live person answers. We give you a written price before we touch anything. And every repair is covered by our 365-Day Done Right Promise: if it fails, we come back and make it right at no charge, including a free second visit.

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

Newark homeowners don’t need another company that treats every duct system like a suburban ranch house built in 1995. Our crews have sealed ducts in the basements of 1880s tenements, reconnected crushed runs behind finished ceilings in the Ironbound, and sorted out airflow problems in mid-century high-rises where the central riser was never designed for modern loads.

We show up uniformed and background-checked, inside the window we quoted. The price we write down before work starts is the price you pay. No per-vent add-ons, no “we found another problem” surprises at the door. Our 365-Day Done Right Promise covers every seal, every joint, every reconnection in writing for a full year.

Our equipment includes Rotobrush rotary brush systems for mechanical cleaning and Nikro negative-air machines for containment. When we seal, we use mastic and mesh rated for the application, not hardware-store tape that peels in Newark’s humid summers. We carry filtration products from Honeywell and Aprilaire when upgrades make sense.

Duct Insulation in Newark

Duct Insulation in Newark is often the missing piece in homes where the ducts are technically sealed but still bleeding temperature. In pre-1950 rowhouses with original galvanized runs through unconditioned basements, or in mid-century high-rises where risers pass through exterior wall cavities, uninsulated ductwork can lose 20 – 30% of heating and cooling energy before the air ever reaches the register. A typical duct insulation job in Newark runs $600 – $1,800 for wrapping accessible trunk lines and plenums with fiberglass or reflective insulation, secured and sealed at every seam.

When Insulation Matters More Than Sealing

Some Newark homeowners call us for “sealing” when the real problem is thermal loss through intact but bare metal. In basements near the Passaic River, where humidity stays high year-round, cold duct surfaces sweat. Insulation stops the condensation that breeds mold and rots surrounding framing. We check with a thermal camera before we quote, so you don’t pay for sealing when wrapping is what you need.

Riser Systems and Shared Ductwork

Mid-century high-rises with central riser systems present a different challenge. The metal stacks run vertically through multiple units, and insulating them requires coordination with building management. We handle the access, the containment, and the fire-rated insulation where code requires it. Our crew has worked with several Newark building associations on these projects.

HVAC Duct Sealing in Newark

HVAC Duct Sealing in Newark starts with understanding what kind of ductwork you’re living with. In the Ironbound and along the river, we regularly find original galvanized or early sheet-metal ducts that have never been opened since installation. The joints have loosened, previous repairs used foil tape that’s dried and curled, and decades of urban particulate have packed into elbows and transitions. A standard HVAC duct sealing job in Newark runs $800 – $2,400, with Ironbound rowhouses often landing in the upper half due to degreasing and access challenges.

Grease-Bound Ducts Need Prep First

In the Ironbound near Ferry Street, our crew tore into a pre-1950 brick rowhouse where the return ducts smelled like fried food and the second-floor registers barely moved air. Camera inspection showed the original galvanized trunk line was disconnected at a joint above the kitchen, with grease-bound dust packed into the first six feet. We degreased the run, reconnected the joint, and sealed it with mastic and mesh per NADCA standards, then verified static pressure at the air handler before we left. Sealant applied over grease would have failed within a season.

Disconnected Runs Behind Finished Ceilings

Pre-1950 homes often have basement ceilings finished with no access panels. We use camera inspection to find crushed or disconnected runs before we cut access. It’s cheaper to cut one strategic panel than to seal a trunk line that isn’t connected to the problem room. We patch and paint when we’re done, leaving the site clean per The Garrison Code.

Trusted Brands We Service in Newark

We stock parts and materials from Rotobrush, Nikro, Honeywell, and Aprilaire, which means most Newark jobs don’t wait on shipping. Rotobrush rotary systems handle the mechanical cleaning when ducts need degreasing before sealing. Nikro negative-air machines keep particulate contained during the process. For filtration upgrades after sealing, we carry Honeywell and Aprilaire media filters sized to the system. When a mid-century high-rise riser needs specific gasket or mastic rated for stack movement, we source it without delay. Fast turnaround matters in Newark, where HVAC runs year-round and nobody wants to wait through a humid August or a January cold snap with compromised airflow.

Common Duct Sealing Problems We See in Newark Homes

• Grease-bonded galvanized surfaces in Ironbound rowhouses. Restaurant exhaust from shared light wells coats duct metal with a film that sealant won’t adhere to. We degrease with alkaline cleaner and mechanical brushing before mastic application, or the seal fails within months.
• Disconnected joints hidden behind finished basement ceilings. In pre-1950 homes along Broad Street and nearby blocks, previous renovations buried access to the trunk line. Camera inspection finds the break; we cut minimal access, reconnect, seal, and restore.
• Undersized mid-century riser systems with seasonal movement. High-rise stacks shift slightly with temperature swings. Rigid mastic cracks under this stress. We use flexible sealants and reinforced mesh rated for the application.
• Decades of accumulated particulate at elbows and transitions. Original sheet-metal ducts look fine from the register but harbor packed debris at turns. Skipping camera inspection means sealing over the blockage, not solving the airflow problem.

Pricing for Duct Sealing in Newark, CA

We Also Serve Cities Near Newark

Our crews work throughout the corridor, including Newark and the surrounding cities of Fremont, Union City, Palo Alto, and Sunnyvale. Each area has its own housing stock and ductwork quirks. Fremont’s newer construction has different failure modes than Newark’s pre-1950 inventory. Wherever you are, we apply the same standard: inspect first, price in writing, seal by the book, verify before we leave.

FAQs About Duct Sealing in Newark