Fast, Reliable Duct Repair & Sealing Across Somerville
Duct repair and sealing in Somerville typically costs $280–$650 for most residential jobs, with flex duct replacements running higher in triple-deckers where access is tight. We handle calls throughout Somerville’s 02143, 02144, and 02145 ZIP codes, usually arriving same-day or next-day from our Lowell base. Call (877) 517-5646 for a free estimate—Thomas shows up as both the owner and the technician doing the work.
We’ve spent 14 years working inside the duct systems that heat and cool Somerville homes. That means we know the difference between a purpose-built forced-air house and a triple-decker on Highland Avenue where someone shoehorned flex duct through a closet chase in 2003. Somerville’s housing stock demands a specific skill set: tight-space sealing, mastic application in bulkheads you can’t stand up in, and the patience to trace convoluted runs that weren’t mapped by any professional. Our Duct Repair & Sealing team treats these systems as the interconnected networks they are—because in a three-family building, one unit’s leak becomes every unit’s problem.
Why Titan Air Duct Cleaning Lowell Is Somerville’s Preferred Duct Repair & Sealing Company
We’ve built our reputation in Somerville the same way we did in Lowell—by showing up personally and fixing what others missed. Thomas Hernandez has been the Lead Technician on every job since we started, and that doesn’t change when we’re working a triple-decker off Elm Street or a condo conversion near Davis Square. Our 389 verified reviews averaging 4.7 stars include repeat calls from Somerville landlords who’ve learned that delegated franchise crews don’t understand shared-duct liability in multi-unit buildings.
Our response time to Somerville is typically same-day or next-day, depending on whether we’re already routing through the area. We know the parking reality—residential permits, narrow streets around Union Square, alley-load access behind older buildings—and we plan accordingly. That local logistics knowledge matters when you’re carrying Rotobrush-compatible rigid takeoffs and mastic sealant buckets into a basement with a 6-foot ceiling.
Most importantly, we understand the specific failure modes of Somerville’s retrofitted ductwork. We’ve seen what happens when Green Line construction dust settles inside unsealed bulkhead runs. We’ve traced mold colonization back to condensation in uninsulated basement ducts. This isn’t theoretical—it’s field experience from 14 years specializing in air duct and HVAC systems, nothing else.
Our Duct Repair & Sealing Services in Somerville
Duct Sealing with Mastic Sealant
Mastic sealant is our primary weapon against the air leakage that plagues Somerville’s retrofitted systems. In triple-deckers where ducts were punched through bulkheads and closet chases without proper sealing at the joints, we brush on water-based mastic to every connection point—permanently, not with tape that dries and fails. A typical mastic sealing job in Somerville runs $280–$450 for a single unit, $650–$950 for a full three-unit building where we need to access multiple floor levels. The mastic we use is rated for the temperature swings these systems see through Somerville’s six-month heating season.
Flex Duct Repair
Flex duct is the cheap solution that keeps failing in Somerville conversions. We’ve replaced crushed, kinked, and torn flex runs in closet chases throughout Winter Hill and East Somerville—usually where a homeowner or tenant shoved storage against a duct that had no protection. Our repair process often involves upgrading to a rigid takeoff where space allows, or at minimum installing proper support saddles so the flex doesn’t sag and collect debris. Single flex duct repairs in Somerville typically run $180–$340; full replacement of a convoluted chase run can reach $450–$680 depending on access.
Metal Duct Repair
When we find rusted or separated metal ductwork in Somerville basements—common in ground-floor runs left uninsulated against dirt foundations—we cut out the damaged section and fabricate replacement pieces on-site. Metal repair demands more labor than flex replacement, but it’s often the only permanent solution for condensation-rotted galvanized steel. Expect $320–$550 for localized metal repair; extensive basement run replacement runs higher.
Duct Insulation
Somerville’s humid summers create condensation inside cool basement ducts, especially in unconditioned spaces beneath triple-deckers. We install foil-faced fiberglass insulation with sealed vapor barriers, stopping the moisture that breeds mold and rots metal from the outside in. Insulation work in Somerville typically runs $240–$420 for accessible basement runs, more if we need to navigate cramped bulkheads near Medford Street or Washington Street.
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 Somerville
Our equipment roster includes Rotobrush agitation systems, Nikro HEPA vacuums, and Abatement Technologies negative-air machines—the same platforms used in commercial remediation jobs, applied to your residential system. For air quality components, we work with Honeywell, Aprilaire, and Guardsman products when sanitizing or upgrading filtration after repair work. We don’t show up with shop vacs and guesswork. We carry the parts and materials to complete most Somerville jobs in a single visit, because we know you don’t want a second appointment in a building where parking already took twenty minutes.
Common Duct Repair & Sealing Problems We See in Somerville Homes
- Unsealed bulkhead ducts pulling in construction particulate. In East Somerville especially, ducts running through abandoned bulkheads near the Green Line Extension corridor were never properly sealed against exterior air. We’ve pulled out layers of fine gray demolition dust mixed with ordinary household debris—material that recirculated through living spaces for years after construction ended.
- Flex duct torn in closet chases. Homeowners in Somerville’s converted condos use every inch of storage space. When a flex duct runs through a closet without protective covering, boxes and hangers puncture the liner. The tear goes unnoticed until musty air or mold spores migrate between floors in a shared building.
- Ground-floor metal ducts rotting from condensation. Triple-decker basements in Somerville are often dirt-floored and unconditioned. When metal ductwork was installed without insulation, summer humidity condenses on the cool surface, rusting the steel from below while hiding the damage until air quality degrades.
- Kinked flex at unsupported bulkhead penetrations. The original retrofit installers frequently punched flex duct through bulkheads without support saddles or proper radius bends. Over years, gravity and vibration create sharp kinks that choke airflow and become lint accumulation points—fire risk in dryer-adjacent runs, efficiency killers everywhere else.
Pricing for Duct Repair & Sealing in Somerville, MA
| Service | Typical Range in Somerville |
|---|---|
| Mastic sealing (single unit) | $280–$450 |
| Mastic sealing (full triple-decker) | $650–$950 |
| Flex duct repair/replacement | $180–$680 |
| Metal duct repair | $320–$550 |
| Duct insulation (basement runs) | $240–$420 |
| Air leak detection & sealing | $200–$380 |
What drives cost higher in Somerville: tight access requiring disassembly of bulkhead panels, multi-unit buildings where we need to coordinate with multiple tenants, and the discovery of concealed mold or water damage that must be addressed before sealing. What keeps costs down: clear basement access, single-unit scope, and straightforward flex-to-rigid upgrades. Every estimate we provide is free and itemized—call (877) 517-5646 to schedule.
We Also Serve Cities Near Somerville
Our service radius extends naturally to Cambridge, where Harvard and MIT-area rentals present their own retrofit challenges; Medford, with similar triple-decker density near the Mystic River; Everett, where industrial-era housing stock overlaps Somerville’s conditions; and Malden, whose converted multi-families share the same duct-sealing needs. We route efficiently between these cities, often scheduling Somerville and Cambridge calls on the same day.
Serving Somerville, MA — Our Local Coverage Area
We’re based in the Somerville 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 Somerville
In Somerville’s triple-deckers, leaky ducts create shared-air liability between units—one apartment’s cooking odors, moisture, or mold spores migrate through unsealed joints into neighboring floors. The original forced-air retrofits rarely sealed properly at installation, and the convoluted bulkhead runs make leakage points hard to locate without professional testing. We seal these systems with mastic to restore compartmentalization between units. Call (877) 517-5646 for a free leak assessment.
Yes—tight-space sealing is a core competency we developed specifically for Somerville’s retrofitted housing stock. We use long-handled mastic brushes, flexible application tools, and compact inspection cameras to reach chase runs that haven’t been touched since installation. Most closet chase sealing jobs in Somerville take 2–3 hours. Call (877) 517-5646 to discuss access at your property.
Fine particulate from the Green Line Extension demolition and excavation work settled inside unsealed bulkhead ducts throughout the Medford Street and Washington Street corridors, creating abrasive buildup that accelerates wear on flex duct liners and contaminates indoor air. We frequently remove this material during repair work and seal the system against future infiltration. If your building is in this zone, mention it when you call—we know exactly what to look for.
We upgrade to rigid metal where space and structure allow, particularly at takeoff points and in accessible basement runs. In tight closet chases where metal won’t fit, we install supported flex with protective covering and sealed joints. The decision depends on your specific chase dimensions and airflow requirements—Thomas evaluates this on-site during every estimate. Call (877) 517-5646 to schedule.
A full triple-decker typically requires one full day or two half-days, depending on basement access and whether tenants are present to grant entry to upper-floor units. We coordinate directly with landlords or property managers to minimize disruption. Most Somerville multi-unit jobs are completed within a single business week from estimate approval. Call (877) 517-5646 to check current scheduling.
Written by Thomas Hernandez, Owner at Titan Air Duct Cleaning Lowell, serving Somerville and surrounding communities since 2010.