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 Norwood
Duct sealing in Norwood, MA typically runs $800 – $2,400 for a whole-system seal, depending on whether we’re patching accessible joints in a basement or chasing leaks through finished walls and crawlspaces. Most Norwood jobs take a half day to a full day, and we price them in writing before any mastic goes on. Call (361) 326-5060 for a free estimate.
We’ve worked in Norwood long enough to know the difference between a cosmetic duct cleaning and the real sealing work these houses need. The balloon-frame capes around the center, the 1960s ranches off Route 1, and the older two-families near Washington Street all share one thing: duct systems that were never designed for the static pressure and filtration standards homeowners expect now. Our crews dispatch from the Boston office and carry the tools to seal sheet-metal trunk-and-branch runs, reconnect crushed flex retrofits, and close the bulkhead penetrations that pull musty basement air into your returns. If your registers blow weak, your basement smells damp, or your upstairs rooms never reach temperature, the problem is usually leaks, not your furnace.
Why Hollis Air Duct Cleaning Is Norwood’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004, and our Duct Sealing crews have handled enough Norwood homes to recognize the patterns: pinhole leaks at foundation transitions in pre-1950s capes, crushed flex behind finished basement ceilings in ranches, and shared return systems in two-family rentals that complicate every repair. We don’t guess. We inspect with cameras, write the price down, and seal what we find.
Our technicians are background-checked and uniformed, and they work under The Garrison Standard: arrive inside the quoted window, price in writing before touching anything, complete the job by the book, and leave the site clean. The 365-Day Done Right Promise covers every seal we make. If a joint opens or a penetration we sealed fails within a year, we come back 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.
Scheduling is coordinated from our Boston office, but the crew that shows up at your Norwood door knows the local housing stock and the specific failure modes it produces.
Duct Repair in Norwood
Duct Repair in Norwood usually means fixing what decades of freeze-thaw, humidity, and settling have done to original sheet-metal and retrofitted flex systems. We reconnect disconnected return trunks, replace crushed supply runs, and patch holes where rodents or moisture have gotten in. A typical repair in Norwood runs $400 – $1,200 for accessible basement work, or $1,500 – $3,500 if we need to open finished ceilings or chase leaks through crawlspaces.
Disconnected Return Trunks
In older Norwood capes and colonials, the sheet-metal return trunk often separates from the air handler at the foundation transition. The gap pulls unconditioned basement air, red-oak pollen, and whatever’s on the stone floor straight into your system. We reconnect with mechanical fasteners, seal with mastic and mesh, and verify with a smoke pencil.
Crushed Flex Duct
1960s and 70s ranches in Norwood often have flex duct retrofits that were jammed through too-small holes in basement joists. The kinks raise static pressure, starve upstairs registers, and eventually tear. We replace crushed sections with properly sized flex or rigid pipe, support it correctly, and seal every joint.
Air Duct Sealing in Norwood
Air Duct Sealing in Norwood is the step that makes cleaning worth doing. Sealing closes the gaps, joints, and penetrations that let your conditioned air escape into the basement and your unconditioned basement air enter the supply. A full-system seal in Norwood typically costs $800 – $2,400, with most single-family homes falling in the $1,200 – $1,800 range. Two-family and multi-zone systems run higher.
Foundation and Bulkhead Penetrations
The most overlooked leaks in Norwood homes are the holes where ducts pass through stone foundations and bulkhead doors. These aren’t duct joints; they’re building envelope failures that become duct problems. We seal them with fire-rated foam, mastic, or sheet-metal patches, depending on the penetration size and location.
Trunk-and-Branch Joint Sealing
Original sheet-metal systems in Norwood’s pre-1950s housing were assembled with snap-lock seams and tape that dries out after sixty years. We brush mastic into every accessible joint, reinforce with fiberglass mesh where movement is likely, and pressure-test where we can to confirm the seal holds.
Trusted Brands We Service in Norwood
Our Norwood crews work with professional-grade equipment from Nikro, Honeywell, and Aprilaire. We stock Nikro negative-air machines and HEPA filtration for source removal, Honeywell media filters and electronic air cleaners for system upgrades, and Aprilaire zoning controls for homes where sealing reveals the ductwork was never properly balanced. For sealing materials, we use mastic and mesh rated for the temperature swings and humidity Norwood basements see. Parts are on the van, so most repairs don’t wait for a second trip. If your system needs a component we don’t stock, we source it fast and schedule the return before we leave the first visit.
Common Duct Sealing Problems We See in Norwood Homes
- Pinhole leaks in original sheet-metal trunks. The galvanized steel in Norwood’s pre-1950s capes and colonials corrodes slowly at the seams, especially where condensation collects against stone foundations. These pinholes don’t show smoke, but they bleed pressure and pull damp basement air year-round.
- Crushed flex duct in ranch retrofits. The 1960s and 70s ranches around South Norwood and near the high school often have flex runs that were pushed through joist bays without proper support. The sag and crush raise static pressure, reduce airflow to second-floor registers, and eventually split at the stress points.
- Unsealed bulkhead and crawlspace penetrations. Exterior crawlspace vents and bulkhead doors in older Norwood homes act as return-side intakes. Without sealing these building envelope gaps, duct cleaning alone can’t stop acorn shells, maple seeds, and fine red-oak pollen from cycling back into the system.
- Shared returns in two-family conversions. The older two- and three-family homes near downtown and along Washington Street often have zone dampers and shared return trunks that were never properly isolated. Sealing one unit’s leaks can pressurize the neighbor’s ducts if the system boundaries aren’t mapped first.
Pricing for Duct Sealing in Norwood, MA
Whole-system duct sealing in Norwood runs $800 – $2,400. Most single-family homes with accessible basement trunks fall between $1,200 and $1,800. Two-family homes, finished basements, or systems requiring crawlspace access run toward the higher end. Duct repair, when needed before sealing, adds $400 – $1,200 for accessible work.
What moves the price: how much of the system is accessible, whether we need to open finished ceilings or walls, the condition of existing duct material (rusted sheet metal requires more prep than sound metal), and whether the job includes reconnecting disconnected runs or replacing crushed flex. We inspect with a camera, write the price down, and get your approval before any work starts. The price does not move at the door. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Norwood
Our Duct Sealing in Norwood crews also handle duct sealing and repair in Walpole, Dedham, Medfield, and Sharon. The same written pricing, same 365-Day Done Right Promise, same background-checked technicians apply in every town we serve.
Serving Norwood, MA - Our Local Coverage Area
We’re based in the Norwood 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 Norwood
You probably need both, but sealing is what fixes the smell. In Norwood’s pre-1950s capes, the musty odor comes from return-side leaks at the foundation that pull damp basement air into the system. We clean first to remove what’s accumulated, then seal the trunk joints and bulkhead penetrations to stop the source. Call (361) 326-5060 and we’ll inspect with a camera to confirm where the leaks are.
We find shared return trunks with missing or failed zone dampers, unsealed fire separations between units, and flex retrofits that bypass original sheet-metal runs without proper support. The multi-unit layout means we map the system boundaries before sealing anything, so we don’t pressurize one unit’s ducts into the other’s. Most two-family sealing jobs in Norwood run $1,800 – $2,800.
Yes, if we seal the right locations. The pollen and debris enter through unsealed bulkhead penetrations and crawlspace vents that sit in the return path. Sealing those building envelope gaps, not just the duct joints, stops the recontamination. In Norwood homes with stone foundations and exterior crawl vents, return-side trunk sealing near the foundation is usually as important as sealing the supply runs.
Norwood’s cold, humid continental climate means long heating seasons that bake dust onto duct interiors, and summer humidity that fosters mold in poorly insulated basement runs. Freeze-thaw cycles shift foundations and stress duct supports, opening new gaps at joints and penetrations. Heavy rain events and ice-dam backups can flood basements and corrode sheet metal from the outside. We use mastic and mesh rated for these conditions, and we check for water damage during every inspection.
It often does, but only if we also address crushed or undersized flex duct. Many Norwood ranches have retrofitted flex that was jammed through joist bays without proper sizing or support. Sealing the joints helps, but the real fix is usually replacing the crushed runs with properly sized duct and balancing the static pressure. We inspect with a camera to tell you which problem you have before we quote.
We were called to a 1948 cape near the Route 1/Automile corridor where the homeowner complained of musty air and uneven heat, and our camera inspection found the original sheet-metal return trunk disconnected from the air handler and flex supply runs crushed against the basement joists. After negative-pressure source removal with HEPA filtration, we reconnected the return trunk, sealed the bulkhead penetration, and used mastic and mesh on the accessible trunk-and-branch joints. The registers now hold steady temperature and the musty odor from the stone foundation is gone.
In Norwood’s pre-1950s balloon-frame capes and 1960s – 70s ranches, the original sheet-metal trunk-and-branch runs and later flex retrofits often draw return-side air through unsealed bulkhead and crawlspace-vent penetrations, so returning air carries fine red-oak pollen, acorn shells, and maple seeds from stone foundations into the system – making return-side trunk sealing near the foundation as important as sealing the supply runs.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Norwood and surrounding communities since 2004.