Fast, Reliable Duct Repair & Sealing Across Hudson
Most duct repair jobs in Hudson, NH are completed in a single visit and cost between $280 and $750, depending on whether you’re sealing accessible joints or replacing failed flex-duct runs in tight crawlspaces. Our Duct Repair & Sealing team dispatches to Hudson from our Boston office, and we typically arrive same-day or next-day to homes anywhere in the 01749 ZIP code. Call (844) 685-6342 for upfront pricing and a free estimate - we’ll be there when we say.
We’ve been working on Hudson’s duct systems for decades. The town’s mix of Victorian-era mill housing near the Assabet River and postwar ranches on the outskirts means no two jobs are alike. Older homes in the downtown corridor were built before forced-air heating existed; their ductwork was retrofitted in the 1950s and 60s with minimal clearances, sharp bends, and connections sealed with cloth-backed duct tape that has long since dried out and failed. We know what to look for, and we bring the right materials to fix it in one trip.
Why Bellows Air Duct & Vent Co. Is Hudson’s Preferred Duct Repair & Sealing Company
Hudson homeowners call us back because we show them the problem before we quote the fix. Every job starts and ends with a camera inspection - a visual record of your ductwork, not just our word. You’ll see the cracked mastic, the separated flex connection, or the mold staining in the plenum. Then we quote one honest price before lifting a single tool. The number on the phone is the number on the invoice.
Our 90-Day Done Right Promise applies to every Hudson job in writing: if the work isn’t right, we return at no charge with no paperwork required. No arguing. We’ve operated this way since 1984 because Ray Castillo built the company on the K.E.Y.S. values code - and we still answer to him.
Calls are answered by a live person, 24 hours a day. Not a voicemail tree, not an app. Our background-checked, uniformed technicians carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies - the same brands serious HVAC contractors specify. Most Hudson jobs are completed in one visit so you don’t lose a second day of work.
Our Duct Repair & Sealing Services in Hudson
Mastic Sealant Application
Duct tape fails. In Hudson’s retrofitted mill housing, we see it every week - cloth-backed tape dried to a brittle shell, peeling away from sheet-metal joints and leaking conditioned air into attics and crawlspaces. Mastic sealant is a fiber-reinforced compound that we brush onto every joint, seam, and penetration. It cures to a flexible, permanent bond that handles expansion and contraction through Hudson’s sub-freezing winters and humid summers. A typical mastic sealing job for a Hudson ranch or Cape runs $280-$450.
Flex Duct Repair & Replacement
Flex duct doesn’t last forever, especially when it was installed in a hurry during a 1960s retrofit with sharp bends and no support. In Hudson’s older multi-family homes, we regularly find crushed, torn, or disconnected flex runs that have been blowing heated air into wall cavities for years. We replace failed sections with properly sized, supported flex or transition to rigid metal where space allows. Flex duct repair in Hudson typically costs $180-$340 per run; full replacement of a deteriorated system runs $520-$890.
Metal Duct Repair
Undersized sheet-metal trunks in Hudson’s 1950s-60s retrofits create high static pressure that literally blows apart weak seals over time. We repair separated trunk lines, patch corrosion holes, and reinforce sagging sections. When a metal trunk has failed beyond repair, we fabricate and install a replacement section on-site. Metal duct repair in Hudson generally runs $340-$620 depending on accessibility and the extent of damage.
Duct Insulation
This is where Hudson’s geography becomes critical. Homes near the Assabet River floodplain - particularly on the lower streets of Hudson’s older neighborhoods - see enough ground-level humidity to make condensation on cold duct surfaces a recurring problem. Uninsulated metal trunks sweat in summer, creating the moisture that feeds mold growth in return-air plenums. We wrap accessible trunks and plenums with formaldehyde-free insulation, sealed at every seam, to stop condensation before it starts. Duct insulation in Hudson runs $450-$780 for a typical system.
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 Hudson
We stock parts and materials from Guardsman, Rotobrush, and Nikro - brands that hold up to the demands of Hudson’s older housing stock. Our trucks carry rigid metal duct, flex duct in multiple diameters, mastic compound, insulation wrap, and mechanical fasteners so we’re not making a supply run while your system sits open. That matters in Hudson, where a failed heating system on a January night isn’t an inconvenience - it’s a genuine problem. We fix it and we stand behind it.
Common Duct Repair & Sealing Problems We See in Hudson Homes
- Failed duct tape at flex-duct connections. The cloth-backed tape used in Hudson’s retrofitted mill housing has a 10-15 year lifespan at best. We find it crumbling to dust in attics and crawlspaces, leaking 20-30% of conditioned air into spaces that don’t need heating or cooling.
- Undersized sheet-metal trunks creating seal-blowing pressure. 1950s-60s retrofits in Hudson’s Victorian-era homes often used trunks too small for the system CFM. The resulting high static pressure forces air through every weak joint until seals fail completely.
- Mold in return-air plenums from Assabet floodplain humidity. Technicians working homes near the river’s low-lying neighborhoods frequently find microbial growth inside plenums - a condition far less common on the drier, higher-elevation lots of neighboring Berlin or Stow. Mastic sealing and insulation are the fix, not just cleaning.
- Crushed or unsupported flex duct in tight crawlspaces. Hudson’s downtown Victorians have minimal clearance beneath the first floor. Original flex runs were often jammed through with no support, sagging and kinking until airflow is choked to a trickle.
Pricing for Duct Repair & Sealing in Hudson, NH
| Service | Typical Range in Hudson |
|---|---|
| Mastic sealant (accessible joints, typical home) | $280 - $450 |
| Flex duct repair (per run) | $180 - $340 |
| Flex duct replacement (multiple runs) | $520 - $890 |
| Metal duct repair (trunk line patch/replace) | $340 - $620 |
| Duct insulation (accessible trunks/plenums) | $450 - $780 |
| Full system assessment with camera inspection | $89 - $149 (credited toward repair) |
What moves the price? Accessibility is the big one. A plenum in an open basement is straightforward. The same plenum buried in a 24-inch crawlspace under a Victorian on Lowell Street takes longer. Material matters too - rigid metal costs more than flex but lasts longer and seals better. We quote every job in person, show you the camera footage, and give you one number before we start. No bait coupons, no price changes at the door. Our $89 Seasonal Tune-Up includes a basic duct assessment, and we offer $50 off any repair over $250. Seniors and veterans receive a permanent 5% discount.
We Also Serve Cities Near Hudson
Our crews work throughout southern New Hampshire. If you’re in Hudson or nearby Nashua, Litchfield, Windham, or Pelham, the same response standards apply: live person on the phone, background-checked uniformed technician at your door, camera-verified results, and our 90-Day Done Right Promise in writing.
Serving Hudson, NH - Our Local Coverage Area
We’re based in the Hudson 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 - Duct Repair & Sealing in Hudson
Most jobs are completed in 3 to 6 hours for a typical two- or three-unit building in Hudson’s downtown corridor. Victorian-era homes with tight crawlspaces or multiple attic access points may take a full day if we’re replacing several flex-duct runs or insulating extensive trunk lines. We schedule enough time to finish in one trip - our techs don’t leave a job half-done. Call (844) 685-6342 to book; estimates are free.
Yes, proper sealing often reduces musty odors significantly, especially in Hudson’s river-adjacent neighborhoods where humid outside air infiltrates through leaks and carries mold spores into living spaces. Sealing alone won’t eliminate active mold growth inside the plenum - that requires remediation and often insulation to prevent recurrence. We camera-inspect first to identify whether the source is leakage, contamination, or both. Call (844) 685-6342 for a free assessment.
Mastic is substantially better than duct tape for permanent sealing in Hudson’s climate. Duct tape adhesive degrades in temperature swings and fails within years; mastic remains flexible and bonded through decades of expansion and contraction. In Hudson’s retrofitted mill housing, we routinely remove failed tape from the 1960s and apply mastic that will outlast the current homeowner’s tenure. We don’t use duct tape for permanent repairs - it’s a temporary patch at best. Call (844) 685-6342 for upfront pricing on mastic sealing.
Yes, we work in confined spaces regularly - it’s standard for Hudson’s downtown Victorians with minimal clearance beneath the first floor. Our techs carry compact tools and flexible materials designed for these conditions. We assess accessibility during our free estimate and will tell you honestly if a section requires alternative access through a closet or floor panel. We’ve yet to encounter a Hudson crawlspace we couldn’t work in. Call (844) 685-6342 to schedule a look.
Properly applied mastic sealant should last 20 years or more, but in Hudson’s older housing we recommend a camera inspection every 5 to 7 years. The original retrofit ductwork in mill-era homes was often installed with substandard materials and methods that create ongoing stress on connections. Floodplain humidity accelerates deterioration. An inspection catches problems before they waste significant energy or degrade air quality. Our $89 Seasonal Tune-Up includes a basic duct assessment. Call (844) 685-6342 to schedule.
On a recent job in a Victorian multi-family near the Assabet River, our techs tore out a failed flex-duct connection sealed with decades-old duct tape. We replaced it with a rigid metal section, applied mastic sealant to the plenum, and insulated the trunk to stop condensation - done in one trip so the homeowners didn’t lose a second day of work. That’s how we work in Hudson. One honest price, shown before we start. Camera-verified results. And if it’s not right, we make it right - no paperwork, no arguing, backed in writing for 90 days.
Call (844) 685-6342 for a free estimate on duct repair and sealing in Hudson. A live person will answer, 24 hours a day.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Hudson and surrounding communities since 1984.