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 Burlington
Duct sealing in Burlington typically runs $850 – $2,400 for a whole-home job, depending on whether we’re sealing accessible joints in a new colonial or rebuilding corroded runs in a 1960s ranch. Our crews serve Burlington from our Boston dispatch office, and we’ve worked on homes from the original capes near the town center to the new construction off Network Drive. Call (361) 326-5060 for a free written estimate.
Burlington’s housing tells two stories: the mid-century ranches and capes built when Route 128 was still new, and the large colonials and contemporaries going up where those old lots get redeveloped. The ductwork in each needs a completely different approach. Our Duct Sealing team has handled both, and we price every job in writing before we touch a single joint.
Why Hollis Air Duct Cleaning Is Burlington’s Preferred Duct Sealing Company
We’ve been in business since 2004 as part of the Garrison Partners family, and our 365-Day Done Right Promise covers every sealing job we do in Burlington. If a joint we sealed fails within a year, we come back and make it right at no charge, including a free second visit. That’s written on every invoice, not implied.
Our technicians are background-checked and uniformed, and they arrive inside the quoted window. When we schedule Duct Sealing in Burlington, we’re accounting for traffic patterns on Route 3 and the 128 interchange, not guessing from a map. Calls are answered by a live person 24 hours a day, 7 days a week, so you’re not leaving voicemail when a bedroom won’t heat.
We use professional-grade equipment from Rotobrush, Nikro, and Honeywell, and we explain what we’re doing in plain terms. No jargon dumps, no pressure to add services. The price we write down before work starts is the price you pay. That’s The Garrison Standard.
Duct Repair in Burlington
Duct Repair in Burlington usually means addressing the original sheet-metal supply runs in 1950s-60s ranches and capes that have rusted through, separated at joints, or been crushed by decades of maintenance traffic in crawlspaces. A typical repair runs $400 – $1,200 per section, depending on accessibility and whether we’re rebuilding a trunk line or patching a single branch. We always inspect with a camera first, show you what we found, and write the price before we cut or seal anything.
Rusted-Through Horizontal Runs
In Burlington’s older homes, the bottom of horizontal duct sections in unheated crawlspaces collects condensation all winter. That moisture rusts through the metal from the inside out. We cut out the failed section, fabricate a replacement from matching gauge galvanized steel, and seal with Guardsman mastic and mesh so the repair outlasts the original.
Disconnected Trunk Lines
Original sheet-metal ductwork was assembled with snap-lock seams and minimal fastening. Sixty years of thermal expansion and vibration loosens these joints until a trunk separates completely. We reconnect with mechanical fasteners plus sealant, not tape alone, because tape on a moving joint fails within two seasons.
Air Duct Sealing in Burlington
Air Duct Sealing in Burlington addresses the conditioned air leaking into attics, crawlspaces, and wall cavities instead of reaching your rooms. In a typical Burlington ranch, we measure 20 – 30% leakage on a duct blaster test before we start. Whole-home sealing runs $850 – $2,400, with most ranches falling in the $1,100 – $1,600 range and newer multi-zone homes at the higher end due to longer duct runs and more joints.
Mastic and Mesh for Permanent Joints
We seal accessible metal joints with brushed-on mastic reinforced with fiberglass mesh. This creates a flexible, durable bond that moves with the duct through heating and cooling cycles. Foil tape alone peels in Burlington’s damp crawlspaces; mastic doesn’t.
Accessible Joint Sealing Only
We don’t promise what we can’t deliver. If a duct run is buried inside a finished wall, we’ll tell you and price the accessible work. Sometimes the best return comes from sealing the ten joints we can reach rather than chasing the two we can’t.
Trusted Brands We Service in Burlington
We stock parts and sealants from Honeywell, Aprilaire, and Abatement Technologies for Burlington jobs, which means no waiting on shipping when your bedroom won’t heat. Our Nikro negative-air machines and Rotobrush rotary systems are the same tools commercial crews use on the office buildings along Wayside Road. When we seal ducts in a Burlington home, we’re applying the same standards to your supply runs that we’d use on a commercial VAV system. That discipline is what The Garrison Standard means in practice.
Common Duct Sealing Problems We See in Burlington Homes
- Condensation rust in crawlspace runs. Burlington’s cold winters and humid summers create temperature swings that condense moisture on ductwork in unconditioned spaces. The rust starts at the bottom of horizontal sections where water pools, and by the time you notice a heating problem, the metal is paper-thin.
- Undersized trunks in 1950s-60s ranches. Original ductwork was sized for furnaces that moved air at higher static pressure than today’s high-efficiency units. Sealing these tight systems without testing can raise pressure enough to starve the blower or trip safety limits.
- Failed DIY tape jobs in damp attics. Homeowners and handymen often apply foil tape to dusty or moist duct surfaces, which peels within one heating season in Burlington’s vented attics. We remove the old adhesive residue and apply mastic to clean, dry metal.
- Multi-zone imbalances in new construction. The large colonials going up near Network Drive have longer duct runs and more dampers, but if the original balancing was never verified, sealing without testing can over-pressurize some zones and under-deliver to others.
Pricing for Duct Sealing in Burlington, MA
A typical duct sealing job in Burlington runs $850 – $2,400 for the whole system. Most 1950s-60s ranches with accessible crawlspace ductwork fall in the $1,100 – $1,600 range. Newer multi-zone homes with longer runs and more joints typically run $1,800 – $2,400. Single repairs to isolated sections start around $400.
What moves the price: accessibility (crawlspace height, attic hatch location), extent of corrosion damage, whether we’re sealing existing joints or rebuilding failed sections, and the number of zones. We do not charge per vent or per joint. One flat price per system, agreed in writing before work starts.
Every estimate is free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Burlington
Our crews work throughout the Route 128 corridor, including Burlington, Pinehurst, Woburn, Wilmington, and Lexington. If you’re in one of these communities and your ducts are leaking heated air into a crawlspace, we cover you under the same 365-Day Done Right Promise.
Serving Burlington, MA - Our Local Coverage Area
We’re based in the Burlington 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 Burlington
Run your hand along the ductwork in your crawlspace or basement while the blower is on; if you feel air escaping at joints or seams, you need sealing. A duct cleaning removes debris from inside the ducts, but it doesn’t close the gaps where conditioned air leaks out. Call (361) 326-5060 and we’ll test with a duct blaster to measure exactly how much you’re losing.
Yes, if the metal is structurally sound. We clean the surface, remove loose rust, and apply mastic with mesh reinforcement. If the metal has rusted through, we repair or replace the section first, then seal. We never seal over active corrosion; it fails within a season.
Leaky supply ducts in the walls or attic are dumping heated air into unconditioned space before it reaches your second-floor registers. Cleaning the interior doesn’t fix that. We pressure-test the system, locate the leaks with a camera and smoke pencil, and seal the accessible joints. In Burlington’s older ranches, we often find the second-floor branch has separated completely above a hallway soffit.
We seal any ductwork we can safely access, including crawlspace and attic runs. In Burlington, that’s often where the worst leaks are. We don’t seal inside finished walls without access panels, and we’ll tell you upfront if a run is unreachable. Our estimate reflects only the work we can actually perform.
We follow SMACNA duct sealing standards and test with a duct blaster to verify results. For residential systems, we target less than 10% leakage to outside after sealing, though some of Burlington’s tighter original systems can’t quite reach that without pressure-related modifications. We document before-and-after leakage numbers on every job, and that paperwork supports your 365-Day Done Right Promise.
Ready to stop heating your crawlspace? Call (361) 326-5060 for a free written estimate on duct sealing in Burlington. We’ll show you what we found, price it before we start, and stand behind the work for a full year.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Burlington since 2004.