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 Framingham
Duct sealing in Framingham typically runs $450 – $1,200 for a whole-home system, depending on whether we’re working with century-old metal trunk lines in a Saxonville triple-decker or flex-duct runs in a northwest subdivision. Most Framingham jobs take a half day, and we schedule them from our Boston office with crews that know the local housing stock block by block. Call (361) 326-5060 for a free written estimate.
We’ve worked Framingham long enough to know the difference between a damp basement on the Southside and a tight crawlspace off Route 9. That matters because sealing ducts without understanding where the water comes from is a waste of your money and ours. Our technicians carry moisture meters, inspection cameras, and the patience to map a system before quoting a price.
Why Hollis Air Duct Cleaning Is Framingham’s Preferred Duct Sealing Company
Framingham homeowners call us back because we show up inside the window, price the job in writing before touching anything, and leave the site clean. That’s The Garrison Standard, and it’s how every Hollis crew operates.
Our Boston office dispatches to Framingham daily. Calls are answered by a live person, 24 hours a day, 7 days a week. No voicemail loops, no callback queues.
Roy Castellanos built this operation on written guarantees, not handshake promises. The 365-Day Done Right Promise covers every duct sealing job in Framingham: if the seal fails or the odor returns within a year, we come back and make it right at no charge, including a free second visit. That’s in writing on every invoice.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. We’ve found that matters especially in Framingham’s older multifamily stock, where tenants and owners both need accountability.
Duct Sealing Services in Framingham
Duct Sealing Services in Framingham address a specific problem: conditioned air leaking out of supply ducts before it reaches your rooms, and unconditioned air sucking into return ducts from damp basements, crawlspaces, or wall cavities. In Framingham’s mixed housing stock, the failure mode changes with the neighborhood. A century-old three-decker near Saxonville often has undersized metal ducts routed through a wet basement on former industrial land, while a post-1990 northwest home runs flex-duct through tight chases. Both leak. Both waste energy. Both can harbor mold after water intrusion. But the sealing method, the material, and whether the ducts can even be saved differ completely.
A typical whole-home duct sealing job in Framingham runs $450 – $1,200. Partial sealing of a single leaky trunk or branch starts around $250. We quote in writing after inspection, not over the phone.
Post-Flood Assessment and Sealing
After basement flooding, some ducts can be dried, cleaned, and sealed. Others are too far gone. We use camera inspection and moisture readings to document which is which, so your insurer has evidence, not opinions. On a two-family near Saxonville, spring snowmelt had pushed water into an unheated basement, and the return ducts had visible mold and a musty odor that returned every year. We set up negative pressure with HEPA filtration, ran a camera inspection to map the wet sections, and sealed the surviving trunk and branch runs – source removal and sealing – so the system was documented for the owner’s insurer without guesswork.
Whole-System Pressure Testing
We pressurize your duct system and measure leakage at the registers and seams. In Framingham’s mid-century ranches and split-levels, we often find short, low-static trunk-and-branch systems that were never designed for modern blower motors. Spot-sealing one or two joints leaves the real problem untouched. Our test shows the full picture before we quote.
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 Framingham
Duct Insulation in Framingham is usually the second half of the job after sealing, especially in unconditioned basements and crawlspaces where our humid continental climate turns metal ducts into condensation machines. Summer humidity here is relentless, and winter cold snaps drive heat loss through thin duct walls. In Framingham’s older housing stock, we see a lot of uninsulated supply lines running through damp basements on the Southside and Saxonville, plus crawlspaces that stay wet from spring snowmelt and the area’s high water table. Insulating without sealing first is pointless – you’re just wrapping a leaky hose.
Whole-home duct insulation in Framingham typically adds $300 – $800 to a sealing job, depending on linear footage and access. We use materials rated for the temperature swings and moisture load this climate throws at them.
Vapor-Barrier Wrapping for Damp Spaces
In Framingham basements that flood seasonally or sit near wetlands, we install insulation with an intact vapor barrier facing outward. This stops warm, moist basement air from hitting cold duct metal and condensing. Without it, mold returns inside six months.
Rigid Board for Exposed Trunk Lines
On older metal trunk lines in Framingham’s two- and three-family homes, rigid fiberglass board with a foil facing holds up better than flex wrap. It doesn’t sag, it doesn’t tear on sharp edges, and it gives a clean surface we can inspect later.
Trusted Brands We Service in Framingham
Our crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration and sealing products from Honeywell, Aprilaire, and Guardsman. We don’t run to the hardware store mid-job. For Framingham customers, that means faster turnaround and parts that match what your system was built with. Whether we’re sealing metal ducts in a Saxonville triple-decker or flex-duct connections in a northwest subdivision, we stock the mastics, tapes, and insulation boards that work for that specific material and static pressure.
Common Duct Sealing Problems We See in Framingham Homes
- Sealing wet or mold-colonized ducts after basement water intrusion. In Saxonville and Southside homes, spring snowmelt pushes water into unheated basements. Sealing over active mold traps moisture and guarantees the odor returns. We test first, document everything, and only seal what’s salvageable.
- Spot-sealing short, low-static mid-century systems. Framingham’s 1950s – 70s ranches and split-levels have trunk-and-branch designs that leak along the entire run. Patching two joints leaves the rest pressurizing your crawlspace. Our pressure test finds every leak before we quote.
- Applying sealant to flex-duct without checking compatibility. Post-1990 northwest Framingham homes use tight flex-duct systems with specific blower motor static ratings. The wrong mastic or tape degrades the liner or creates static the motor can’t overcome. We verify material and match the sealant.
- Sealing return ducts through damp crawlspaces without fixing the moisture source. Framingham’s high water table means crawlspaces stay wet year-round. Seal the ducts, ignore the crawlspace, and spring melt plus summer humidity undo your work inside two seasons. We flag this before quoting.
Pricing for Duct Sealing in Framingham, MA
Whole-home duct sealing in Framingham runs $450 – $1,200. Partial sealing of specific trunk or branch lines starts at $250. Duct insulation added to a sealing job runs $300 – $800 more. What moves the price: linear footage of ductwork, access (crawlspace vs. finished basement), whether we need to set up containment and HEPA filtration for mold-affected sections, and whether pressure testing reveals leaks throughout the system or just at a few joints.
We do not quote per-vent. We do not bait with a teaser price and add charges at the door. The price is written down before any work starts, and it does not move. Every Framingham job gets a free written estimate. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Framingham
Our crews work Framingham regularly and also take duct sealing calls from Wellesley, Marlborough, Needham, and Maynard. Scheduling runs from our Boston office, and we route crews to minimize wait times across the metro west area. If you’re in one of these towns and your basement flooded or your ducts smell musty every spring, we cover you under the same written price and 365-Day Done Right Promise.
Serving Framingham, MA - Our Local Coverage Area
We’re based in the Framingham 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 Framingham
It depends on what the camera and moisture meter show. If the water touched the ducts but didn’t saturate the insulation or colonize the metal with mold, we can dry, clean with HEPA-contained negative air, and seal. If the ducts are rusted through, the liner is delaminating, or mold has penetrated porous insulation, replacement is the only honest recommendation. We document both paths with photos and readings so your insurer has evidence, not guesswork. Call (361) 326-5060 for a free post-flood assessment.
Framingham sits on former industrial land and wetlands with a high water table, and many homes – especially triple-deckers near Saxonville and the Southside – have return ducts running through unheated, damp basements or crawlspaces. Spring snowmelt and summer humidity create conditions where mold grows faster than dust accumulates. Road dust from Route 9 and the Mass Pike adds to the load, but the musty smell is what drives most Framingham homeowners to call. We address the moisture source and the duct condition together, or the problem returns.
No. Saxonville triple-deckers usually have undersized metal trunk-and-branch lines in damp basements, so we test for rust, map the leaks with pressure testing, and use mastic rated for metal at higher static pressures. Northwest post-1990 homes run flex-duct with lower static ratings and different connection methods; the wrong sealant degrades the liner. The sealing strategy differs block by block in Framingham, which is why we inspect before quoting.
We provide dated photos from the camera inspection showing water lines, rust, or mold inside the ducts; moisture meter readings at multiple points; HEPA containment setup photos proving we didn’t spread contamination; and a written scope stating exactly what was sealed, what was replaced, and why. This documentation package has been accepted by Framingham-area insurers because it replaces opinion with timestamped evidence. We build it on every post-storm job.
After. Sealing ducts in a still-damp crawlspace is temporary at best. Framingham’s high water table means crawlspaces stay wet from spring melt and summer humidity; seal the ducts first, and the moisture finds new paths, or degrades your new seal from the outside. We flag active moisture sources during inspection and can recommend remediation sequencing. The 365-Day Done Right Promise covers our sealing work, but it can’t stop groundwater. Call (361) 326-5060 and we’ll walk through your specific crawlspace situation.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Framingham and the metro west area since 2004.