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 Shelton
Duct sealing in Shelton, CT typically runs $450 – $1,200 for a whole-house job, and most homes we seal are mid-century capes, ranches, and split-levels with decades of wear on the original ductwork. We’re the Duct Sealing in Shelton crew that knows the difference between a valley floodplain basement with sweating sheet metal and a Huntingdon hill subdivision with sagging flex duct – because we’ve sealed both. Dispatch and scheduling are coordinated from our Hartford office, but our trucks roll to Shelton neighborhoods regularly. Call (361) 326-5060 for a free estimate and a written price before any work starts.
Why Hollis Air Duct Cleaning Is Shelton’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our Duct Sealing team has worked enough Shelton homes to know what the housing stock hides. The 06484 zip and surrounding neighborhoods – from the older streets near the Derby line to the newer builds off Route 8 – keep us busy with two distinct problems: rust-streaked register boots in damp basements and sagging flex runs in attics that should have been supported better.
Our technicians are background-checked and uniformed, and they arrive inside the quoted window. The price is written down before any tool touches your ductwork. Every seal job carries our 365-Day Done Right Promise – if the work 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. No voicemail loops. No callback queues.
Air Duct Sealing in Shelton
Air Duct Sealing in Shelton means closing the gaps, cracks, and disconnected joints that let your heated or cooled air leak into basements, crawlspaces, and wall cavities before it ever reaches your rooms. We also offer Shelton Dryer Vent Cleaning to keep your whole ventilation system safe. In a typical Shelton cape or ranch built between the 1940s and 1970s, we find original sheet-metal trunk-and-branch systems with joints that have worked loose over sixty-plus years of thermal expansion and contraction. The homeowner pays to heat the basement instead of the bedroom. A whole-house seal in Shelton generally falls between $450 and $1,200, with simpler partial seals running $250 – $450.
What We Seal on Valley Homes
Near the Housatonic floodplain, we open up basement runs and find disconnected joints where mastic has dried and flaked away, plus condensate pooling in low spots that rusts the metal from the inside out. We clean the runs first under negative pressure, then seal with fresh mastic and reinforcing mesh. The rust streaks at your registers are the symptom; the disconnected joint in the basement is the disease.
What We Seal on Hill Subdivisions
Off Huntingdon and the east-side hills, newer construction often used flex duct that sags between supports. The low spots collect debris and moisture, and the connections at the plenum loosen over time. We re-support the runs, replace crushed sections, and seal the plenum connections with proper collars and mastic – different materials, different technique, same standard.
Duct Sealing Services in Shelton
Duct Sealing Services in Shelton cover the full range of what it takes to make your forced-air system move conditioned air only where you want it. We don’t just squirt foam into a gap and call it done. Our crew inspects with a camera first, identifies every leak point, then presents a written price before sealing begins. Most Shelton homeowners call us after noticing hot or cold rooms, rising utility bills, or that musty smell every July when the AC kicks on.
Inspection and Camera Diagnosis
We run a borescope through the accessible ductwork to show you what we see – disconnected joints, crushed runs, or flex duct that has pulled free from the collar. You see the footage. We mark the problem spots. Then we price the repair in writing.
Sealing Methods We Use
For sheet-metal systems, we use water-based duct mastic with fiberglass mesh reinforcement – it flexes with temperature changes and lasts decades. For flex duct, we use mechanical collars plus mastic at the plenum connections, and we add proper support straps where the original installer cheaped out. Our equipment includes Nikro negative-air machines and HEPA filtration from Abatement Technologies to keep your air clean while we work.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Shelton
We carry and install filtration and sealing products from Honeywell, Aprilaire, and Abatement Technologies – the same brands commercial crews use in hospitals and schools. For Shelton homeowners, that means no waiting on parts shipped from out of state. If your system needs a new filter housing sealed to the return plenum, or an Aprilaire media cabinet integrated into a trunk line, we stock it and install it same visit. Our Nikro negative-air equipment and Honeywell filtration products are on every truck, so the job doesn’t stall because a part didn’t arrive.
Common Duct Sealing Problems We See in Shelton Homes
- Rust streaks at register boots above full basements. In homes near the Housatonic floodplain, especially the older capes off Bridgeport Avenue and Pine Street, summer condensation runs down the outside of sweating sheet-metal ducts and leaves orange-brown stains on your floor registers. The real problem is usually a disconnected joint in the basement trunk line letting warm, humid basement air contact cold supply metal.
- Crushed or disconnected trunk-and-branch runs in mid-century ranches. The original 1950s and 1960s sheet metal was never designed for sixty years of vibration. We find joints that have separated by an inch or more, blowing your heated air directly into the basement crawlspace instead of the living room above.
- Sagging flex duct in east-side subdivisions. The newer homes off Huntingdon and Route 8 used flexible duct that wasn’t supported at the code-required intervals. Over ten to fifteen years, the sagging creates low spots where debris and moisture collect, and the plenum connections work loose.
- Supply and return leaks that pressurize basements and pull in musty air. When your return side is leaking in a damp Shelton basement, the furnace doesn’t just recirculate house air – it sucks in basement air loaded with mildew spores and blows it through every room. Sealing the return plenum and trunk connections fixes the source, not the symptom.
Pricing for Duct Sealing in Shelton, CT
A typical whole-house duct sealing in Shelton runs $450 – $1,200. Partial seals targeting a specific problem zone – a disconnected basement trunk line, a crushed flex run in an attic – generally fall between $250 and $450. What moves the price: how much ductwork is accessible, whether we need to remove debris first, and if the job requires re-supporting sagging flex or replacing crushed sections rather than just sealing intact ones.
We give one flat price per system, agreed in writing before any work starts. No per-vent pricing. No add-ons at the door. Every estimate is free, and we show you the camera footage so you understand what you’re paying for. Call (361) 326-5060 for your exact quote.
We Also Serve Cities Near Shelton
Our crews work across the lower Naugatuck Valley and the shoreline corridor. We regularly seal ducts in Shelton, Derby, Ansonia, Orange, and West Haven – same standard, same written price, same 365-Day Done Right Promise on every job. If you’re in a neighboring town and your registers show rust streaks or your upstairs never gets warm, we cover your area too.
Serving Shelton, CT - Our Local Coverage Area
We’re based in the Shelton 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 Shelton
Shelton’s Housatonic River valley location puts many homes in a damp floodplain where basement humidity runs higher than inland towns like Trumbull, and the older sheet-metal ducts in mid-century capes condensate heavily in summer. The rust streaks are condensation running down cold supply ducts with disconnected joints that let humid basement air contact the metal. We seal the joints and add proper insulation where needed – call (361) 326-5060 for a free inspection.
The signs are uneven heating or cooling between rooms, a furnace that runs longer than it should, or visible rust and debris around basement joints. We confirm it with a camera inspection that shows you the exact condition inside your ducts. If we find disconnected or crushed runs, we present a written repair price before any sealing begins – call (361) 326-5060 to schedule.
Yes. The flex duct used in east-side Shelton subdivisions from the 1990s forward often sags between supports and loosens at plenum connections within ten to fifteen years. The symptoms are the same – hot and cold rooms, dust accumulation, musty odors – but the fix involves re-supporting and re-sealing flex rather than repairing sheet-metal joints. We handle both.
We seal only clean ductwork, because mastic won’t adhere to a surface coated in decades of dust and debris. In most older Shelton homes, we find enough accumulation that a rotary brush cleaning under negative pressure is necessary before sealing. We price both steps together, in writing, before starting – no surprise add-ons. Call (361) 326-5060 and we’ll inspect to tell you exactly what your system needs.
Shelton’s cold, damp winters and hot, humid summers create more thermal expansion and condensation stress on ductwork than drier inland climates. A seal that ignores moisture management – like a basement joint sealed without addressing the condensation that caused the original failure – will fail within a season. We build moisture control into our floodplain repairs, and we use mastic rated for the temperature swings your ducts see. Under our 365-Day Done Right Promise, if any seal fails within a year, we return and make it right at no charge.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Shelton and the lower Naugatuck Valley since 2004.