Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterFast, Reliable Duct Sealing Across Kensington
Duct sealing in Kensington typically runs $800 – $1,800 for a whole-house system, and most jobs are scheduled within a week. We dispatch crews from our Hartford office to serve Kensington directly, so you’re not waiting on a contractor routing from Bridgeport or New Haven.
We’ve worked on enough homes around the Town Center and along Farmington Avenue to know what the housing stock here is built from. Kensington’s ranches, capes, and colonials from the 1950s through 1970s carry original galvanized steel ductwork that rusts from the inside in damp basements and crawl spaces. That rust flakes off, joints loosen, and suddenly you’re heating your crawl space instead of your bedroom. Our Duct Sealing team finds this on most Kensington jobs we price. Call (361) 326-5060 and we’ll put a written number in front of you before any work starts.
Why Hollis Air Duct Cleaning Is Kensington’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. In Kensington, that means technicians who understand post-WWII construction, not crews guessing at what they’ll find behind a finished basement ceiling.
Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues.
Every technician is background-checked and uniformed. You know who’s walking into your home before they arrive.
We price in writing before we touch anything. The number on the page doesn’t move at the door. That’s The Garrison Standard, and it’s how we operate on every Duct Sealing in Kensington job.
Our 365-Day Done Right Promise covers every repair in writing. If the work fails within a year, we return and make it right at no charge, including a free second visit.
Duct Repair in Kensington
Duct Repair in Kensington is often the step homeowners need after a cleaning reveals damage they couldn’t see from the registers. We run camera inspections through the system and regularly find crushed return runs, disconnected supply branches, and rusted-out galvanized joints in homes built between 1940 and 1980. A typical duct repair in Kensington runs $400 – $950 depending on accessibility and whether we’re reconnecting a single branch or rebuilding a trunk line.
Crushed Runs and Disconnected Branches
Mid-century renovations around the Town Center frequently cut into original duct trunks without proper fittings. We find supply branches feeding bedrooms that have been disconnected for decades, or return runs flattened by stored items in a basement. The homeowner notices uneven heating; the cause is hidden behind drywall or ceiling tile.
Rusted Galvanized Joints
Original steel ductwork in Kensington’s damp basements rusts from the inside. The outside looks intact. Inside, metal flakes and scale destroy the seal. We cut open failing sections, remove the debris, and rebuild with proper fittings and mastic sealant rated for residential HVAC.
Air Duct Sealing in Kensington
Air Duct Sealing in Kensington addresses the leaks and pressure imbalances that force your blower motor to run longer and your utility bills to climb. We use duct sealing mastic and mechanical fasteners to close gaps at joints, seams, and connections. A whole-house air duct sealing job in Kensington typically costs $800 – $1,800, with smaller partial-system repairs starting around $450.
Mastic Sealing for Older Metal Ducts
Galvanized steel expands and contracts through Kensington’s heating and cooling seasons. Tape dries out. Mastic stays flexible. We brush or spray mastic at every joint and seam, then verify with a pressure test before we leave.
Post-Cleaning Sealing Protocol
Sealing dirty ducts traps debris inside. We agitate and extract first, using Rotobrush rotary systems and Nikro negative-air machines with HEPA filtration. Only then do we seal. The homeowner gets clean ducts that stay clean, and a system that moves air the way it was designed to.
Trusted Brands We Service in Kensington
Our equipment roster includes Rotobrush rotary brush systems for agitation, Nikro negative-air machines for source removal, and filtration products from Honeywell, Aprilaire, and Guardsman. We stock common fittings and mastic compounds for Kensington’s galvanized steel ductwork, so most repairs don’t wait on parts. When a homeowner on Percival Avenue needed a crushed return run rebuilt last February, we had the transition fittings in the van and finished the same day. That’s the difference between a crew that carries inventory and one that makes two trips.
Common Duct Sealing Problems We See in Kensington Homes
- Rusted galvanized joints in damp basements. Kensington’s post-WWII homes have original steel ductwork that corrodes from the inside where humidity collects. The metal flakes apart, joints gape open, and heated or cooled air leaks into unfinished spaces before it reaches the registers.
- Mid-century renovation cuts without proper fittings. Homes near the Town Center often have supply or return branches that were hacked into during 1960s or 1970s remodels. The connections were never properly sealed, creating pressure imbalances that worsen every July and January.
- Crushed runs behind finished ceilings. Basements that were finished decades ago sometimes hide ductwork flattened by storage, construction debris, or improper support. The system still moves air, but the blower strains and the upstairs rooms never reach temperature.
- Leaf litter and pollen accumulation from the oak and maple canopy. Kensington’s heavy tree cover dumps organic material onto roofs and into intake vents. That debris works its way into the duct system, compacts at joints and turns, and accelerates corrosion in already-aging metal.
Pricing for Duct Sealing in Kensington, CT
A typical whole-house duct sealing in Kensington runs $800 – $1,800. Partial-system sealing, such as a single trunk line or a problematic basement run, starts around $450 and usually tops out at $750. Duct repair, when we find crushed or disconnected runs, ranges from $400 – $950 depending on how much finished ceiling or wall we need to access.
What moves the number: the linear footage of ductwork, accessibility (crawl space vs. open basement), whether we’re sealing after a cleaning or repairing structural damage, and how many branches need reconnection. We put all of this in writing before any work starts. No per-vent pricing, no add-ons at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Kensington
Our Hartford office dispatches crews throughout central and southern Connecticut. We regularly handle duct sealing and repair work in Bridgeport, Stamford, New Haven, and Hartford, with scheduling coordinated to keep wait times reasonable across the service area.
Serving Kensington, CT - Our Local Coverage Area
We’re based in the Kensington area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Duct Sealing in Kensington
Kensington’s post-WWII ranches, capes, and colonials were built with galvanized steel ductwork that rusts from the inside in damp basements and crawl spaces, while newer towns have flex duct or sealed duct board that degrades differently. The original metal joints in Kensington homes loosen as rust flakes away, creating leaks that a 1990s split-level simply doesn’t develop. Call (361) 326-5060 and we’ll inspect your system to see if sealing or repair is the right step.
We run a camera inspection through the duct system and take static pressure readings at the blower and registers to identify blockages or pressure drops. Crushed returns show high negative pressure; disconnected supplies show low or no airflow at the register. On a recent job near the Town Center, our tech found a disconnected branch feeding two bedrooms that had been that way since a 1970s basement renovation. Call (361) 326-5060 for a free inspection.
Cleaning removes debris but does not rebuild rusted metal or reconnect crushed runs. In Kensington’s housing stock, we often find that cleaning reveals the real problem: joints that were sealed with failing tape, branches that were never properly attached, or metal that has thinned to the point of collapse. Sealing or repair follows cleaning on most jobs where the home still has original ductwork. Call (361) 326-5060 and we’ll tell you what your system actually needs.
We use Rotobrush rotary brush systems for agitation, Nikro negative-air machines with HEPA filtration for source removal, and professional-grade mastic compounds applied with brushes or spray equipment depending on access. For pressure testing after sealing, we use digital manometers to verify that the system holds the designed static pressure. This is the same equipment commercial crews use, maintained to the same standard. Call (361) 326-5060 with questions about our process.
Spring and fall are ideal because the system isn’t running at peak load, but we seal ducts year-round in Kensington. The bigger factor is whether the ducts are clean first. Sealing dirty ducts traps debris, so we schedule cleaning before sealing unless the homeowner had cleaning done recently. Humid summer days also make basement rust and mold easier to spot, which helps us identify all the joints that need attention. Call (361) 326-5060 to schedule.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Kensington and central Connecticut since 2004.