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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Newton
Duct sealing in Newton typically costs $800 – $2,400 for a whole-house job, depending on whether we’re sealing accessible basement trunks or chasing leaks through finished walls. Most Newton homes need sealing, not replacement. Our crews dispatch from the Boston office and carry the equipment to handle both the routine jobs and the surprises that Newton’s older housing stock tends to hide. Call (361) 326-5060 for a written estimate before any work starts.
We’ve been working in Newton long enough to know the pattern. A homeowner in Waban calls because the second floor never gets warm. Another in Newton Highlands notices dust puffing from a basement register. Both have the same underlying problem: air that should reach the rooms is leaking into walls, attics, and crawlspaces through joints that were never meant to hold the static pressure of a modern blower. In a city where the housing stock spans pre-1900 Victorians to post-WWII ranches, duct sealing isn’t a cookie-cutter job. It’s diagnosis and repair, done by someone who knows what they’re looking at.
Why Hollis Air Duct Cleaning Is Newton’s Preferred Duct Sealing Company
Our reputation in Newton was built on showing up inside the window and pricing in writing before we touch anything. That’s The Garrison Standard, and it’s how every Hollis location operates, including ours. We’ve earned repeat calls from homeowners in Newton Centre and Nonantum who initially hired us for a duct cleaning and brought us back when they realized the real problem was air leaking from seams that should have been sealed decades ago.
Response time matters here because Newton’s climate punishes inefficient systems. When your furnace is running hard through a January cold snap or your air handler is fighting July humidity, every cubic foot of conditioned air that escapes into the basement is air you’re paying to generate twice. We schedule Newton jobs with the equipment and materials on the truck, so we’re not making a second trip for mastic, mesh, or insulation board.
Our technicians are background-checked and uniformed. You know who’s arriving before they walk up your porch steps. And every repair we make is covered by our 365-Day Done Right Promise: if the seal fails or the problem returns within a year, we come back and make it right at no charge, including a free second visit. That’s written on every job, not implied.
Duct Sealing Services in Newton
Duct Sealing Services in Newton address the leaks, separations, and pressure losses that waste conditioned air and strain your HVAC equipment. A typical whole-house sealing job in Newton runs $800 – $2,400, with simpler basement trunk repairs at the lower end and multi-zone systems with finished-wall access at the higher end. Most Newton homeowners notice the problem when rooms stay cold in winter, energy bills spike, or they feel air blowing from joints in the basement that should be sealed tight.
Our Duct Sealing team starts with a pressure test to locate leaks, then seals accessible seams with mastic and reinforced mesh. Where we find disconnected or crushed runs, we repair or replace the section and seal the connection. In Newton, this often means working around original galvanized steel that was sized for gravity furnaces, not modern forced-air systems.
Pressure Testing and Leak Location
We seal a temporary fan to your duct system and measure how much air escapes. A typical home loses 20 – 30% of conditioned air to leaks. In Newton’s older homes, we’ve seen losses above 40% where original trunk joints have separated under blower pressure. The test gives us a map of where to work and a before-and-after number that proves the job.
Mastic Sealing of Accessible Joints
We brush on water-based mastic, a thick sealant that remains flexible, and embed fiberglass mesh across seams and joints. Unlike tape, which dries and peels, mastic bonds to metal and flexes with temperature changes. We apply it to every accessible joint, register boot, and trunk connection we can reach.
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.
Duct Insulation in Newton
Duct Insulation in Newton prevents the condensation, heat loss, and seal failure that happen when warm humid air hits cold duct surfaces in unconditioned spaces. A typical insulation job in Newton runs $600 – $1,800 depending on linear feet of exposed duct and whether we’re wrapping basement trunks or insulating crawlspace runs. Newton homeowners need this when they see water staining on basement ceilings, feel cold air blowing from registers in winter, or notice that new mastic seals fail within a season.
The local freeze-thaw cycle is the culprit. Cold air in your ducts meets humid Newton summer air in the basement, or warm heated air condenses on cold crawlspace runs in January. Water forms, mastic lifts, and you’re back to leaking air. Insulation breaks that cycle.
Fiberglass Wrap with Vapor Barrier
We wrap exposed trunks and branches with foil-faced fiberglass insulation, sealed at seams with matching tape. The vapor barrier faces outward, preventing moisture from reaching the cold duct surface. In Newton basements with asbestos-wrapped original ducts, we coordinate with licensed abatement contractors before insulating.
Crawlspace and Rim Joist Protection
Newton’s post-WWII ranches and split-levels often have ductwork in crawlspaces that sit below grade. These runs see the worst condensation. We insulate and seal the rim joist area where ducts pass through, preventing both air leakage and the moisture intrusion that destroys new seals.
Trusted Brands We Service in Newton
We carry professional-grade equipment and materials on every Newton job, including Aprilaire filtration components, Abatement Technologies HEPA machines, and Guardsman sealants. Our rotary brush systems from Rotobrush and negative-air machines from Nikro are the same tools commercial crews use in hospitals and schools, not hardware-store rentals. For Newton homeowners, this means we don’t leave to “order parts” and come back next week. The right material for your galvanized trunk, flex duct, or asbestos-coordinated repair is on the truck. Turnaround is same-visit for most sealing and insulation work.
Common Duct Sealing Problems We See in Newton Homes
- Separated galvanized trunk joints in pre-1900 Victorians and 1920s colonials. These homes were built for gravity furnaces that moved air by convection, not blowers that generate static pressure. The original seams were never meant to hold 0.5 inches of water column. We find gaps at elbows and takeoffs where supply air is dumping into basement cavities instead of reaching bedrooms.
- Asbestos-wrapped basement duct runs that stop work until regulations are followed. Massachusetts requires licensed abatement for disturbing friable asbestos. Homeowners often don’t know the wrap is there until we open a ceiling or move a partition. We coordinate with certified abatement contractors and resume sealing once the site is cleared.
- Freeze-thaw condensation destroying new mastic in crawlspaces and rim areas. Newton’s cold winters and humid summers create temperature swings that condense moisture on uninsulated metal. Mastic applied without insulation lifts within a season. We insulate as we seal, or the repair won’t last.
- Retrofitted systems in Newton Highlands and Waban with crushed or kinked flex duct. Previous owners or handymen ran flexible duct through tight chases to add air conditioning to homes that never had it. The kinks choke airflow and create pressure points that blow out seals. We replace the damaged runs and seal properly.
Pricing for Duct Sealing in Newton, MA
A typical duct sealing job in Newton runs $800 – $2,400. Simple basement trunk sealing with accessible joints falls at the lower end. Jobs requiring wall access, asbestos coordination, or multi-zone systems with finished basements run higher. Duct insulation adds $600 – $1,800 depending on linear footage.
What moves the price: accessibility of the ductwork, presence of asbestos wrap requiring licensed abatement, whether we need to open walls or ceilings, and whether insulation is included. We don’t quote per-vent or per-square-foot teaser prices that balloon once we’re inside. We inspect, we write the price, you approve it, and that’s the price. No change orders at the door.
Estimates are free. Call (361) 326-5060 to schedule. We’ll pressure-test the system, show you where the air is escaping, and give you a written number before any sealing work begins.
We Also Serve Cities Near Newton
Our crews work throughout the western Boston metro area. We regularly schedule Duct Sealing in Newton alongside jobs in Belmont, Brookline, Cambridge, and Waltham. The same written pricing, same background-checked technicians, same 365-Day Done Right Promise applies in every city we serve.
Serving Newton, MA - Our Local Coverage Area
We’re based in the Newton 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 Newton
That white or gray wrap is likely asbestos insulation on original galvanized ductwork, common in Newton homes built before 1970. We cannot disturb it without following Massachusetts asbestos regulations, so sealing work pauses until a licensed abatement contractor clears the material. We coordinate that step and resume sealing with mastic, mesh, and insulation once the site is safe. Call (361) 326-5060 and we’ll inspect to confirm what you’re seeing.
Yes. The freeze-thaw cycle and heavy seasonal HVAC use mean Newton ducts experience more thermal expansion and condensation than systems in milder climates. Uninsulated basement trunks sweat in July and contract in January, which lifts mastic and re-opens seams if the sealing job didn’t include proper insulation. We account for this by specifying insulation with every crawlspace or rim-joist seal.
In Newton Highlands, we pulled a 1920s colonial’s return drop in the basement and found the original galvanized trunk separated at a joint behind an asbestos-wrapped section, with return air pulling attic dust straight into the air handler. After source removal under negative pressure with HEPA filtration, we bridged the gap with mastic and mesh and re-sealed the trunk seams, then ran a camera inspection to confirm the run held. Static pressure at the blower motor dropped and the second-floor registers stopped whistling.
Newton’s seasonal leaf blower restrictions mean more pollen and dust settle on lawns and driveways, where HVAC intakes pull it into the system. That debris accelerates filter loading and can deposit in ductwork, but it doesn’t change how often sealing is needed. Sealing addresses air leaks at joints and seams, not interior debris. If your ducts are dirty and leaking, we clean first, then seal, so we’re not trapping contamination in a freshly sealed system.
After. Sealing a dirty system traps debris inside. We clean first using rotary brush and negative-air methods, then pressure-test and seal the now-accessible joints. The sequence matters: clean, inspect, seal, verify. In Newton’s older homes, the cleaning phase often reveals the separated joints and crushed runs that sealing is meant to fix. Call (361) 326-5060 to schedule both services with a single written price.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Newton and the greater Boston area since 2004.