Fast, Reliable Duct Repair & Sealing Across Everett
How much does duct repair and sealing cost in Everett? Most residential jobs run $280–$750, with full system mastic sealing on a typical triple-decker reaching $600–$1,200. We usually book Everett appointments within 48 hours and complete most repairs same day. Call (888) 597-5659 for a free estimate.
We’re in Everett regularly — from Admirals Hill down to Lower Broadway and through the Bellingham Square Historic District — and we’ve learned that ductwork here isn’t like ductwork in Medford or Malden. The retrofitted forced-air systems in Everett’s 1890s–1930s triple-deckers were never designed for modern HVAC, and the industrial particulate load from the Mystic River petroleum terminals makes sealing quality a genuine health issue, not a comfort upgrade. Our Duct Repair & Sealing team handles everything from collapsed flex runs in basement mechanical rooms to whistling metal trunks in century-old walls.
Scott Gray, our owner and lead technician, has spent 11 years inside Greater Boston ductwork. He answers the phone, runs the estimate, and does the repair himself. That direct accountability matters in Everett, where building access can mean coordinating with multiple tenants in a single stacked building and where the repair approach has to account for both aging housing stock and environmental conditions no other nearby city faces.
Why Everest Air Duct Cleaning Service Massachusetts Is Everett’s Preferred Duct Repair & Sealing Company
Proven local track record. 617 customers have rated us 4.9 stars, and a significant share of those reviews come from repeat Everett clients in multi-unit buildings where we’ve solved problems other companies couldn’t diagnose. We don’t dispatch rotating crews — Scott handles every job personally, so the technician who quoted your repair is the one climbing into your attic with the mastic gun.
Equipment that matches the problem. We use Rotobrush brush-system technology and Nikro HEPA vacuums for pre-repair cleaning, plus Abatement Technologies air scrubbers when we’re working in occupied units. For sealing, we apply mastic sealant and reinforced mesh at joint stress points — the only method that holds up against Everett’s humidity and vibration from oil-fired furnaces common in older buildings.
Response time that respects your schedule. We’re typically on-site in Everett within 24–48 hours of your call. We understand that in a triple-decker with shared systems, delaying repair means multiple tenants breathing the same leaking air. We coordinate access, work around leaseholder schedules, and finish most single-unit repairs in under four hours.
Local knowledge that changes outcomes. We know the difference between household dust and the dark, oily grit that accumulates in ducts near Lower Broadway — and we know that sealing has to be more thorough here because that particulate is finer and more persistent. Generic sealing approaches from out-of-town franchises fail within a season in Everett’s conditions.
Our Duct Repair & Sealing Services in Everett
Duct Sealing
Most Everett homes we work on lose 20–30% of conditioned air through leaks before it reaches the vents. In retrofitted triple-deckers, the problem is worse: ducts routed through uninsulated wall cavities and attic spaces pull in humid outdoor air in summer and bleed heat in winter. We pressurize the system, locate every leak with calibrated smoke, then seal with mastic — not tape alone, which dries and cracks within five years in Everett’s basement humidity. A typical sealing job on a two-unit Everett building runs $450–$850 depending on access.
Flex Duct Repair
Flex duct installed during 1980s–2000s HVAC retrofits in Everett is now reaching failure age. We see crushed runs in attics where insulation contractors walked over them, splits at hanger points, and collapses from moisture accumulation in basement mechanical rooms near the Mystic River. In a triple-decker on Admirals Hill, we found the lower unit’s flex duct had collapsed from moisture and the metal supply trunk had a gap at every seam, leaking the oily diesel-residue into the living space. We mastic-sealed all joints and replaced the flex run with rigid metal, cutting the tenant’s filter changes from every 3 weeks to every 3 months. Flex duct replacement in Everett typically costs $180–$340 per run.
Metal Duct Repair
Original galvanized metal ducts from forced-air retrofits in Everett’s 1910–1930s housing are prone to seam separation, corrosion at condensate collection points, and whistling from loose joints. We repair with sheet metal patches, drive cleats, and full mastic encapsulation — not duct tape, which fails. For severely corroded sections, we fabricate replacement trunk lines on-site. Metal duct repair in Everett runs $220–$580 depending on linear feet and access difficulty. We prioritize repairs that don’t require wall demolition, using existing chase ways and basement access points.
Duct Insulation
Uninsulated metal ducts in Everett’s unconditioned attics and crawl spaces sweat in summer, creating the moisture that feeds mold and biofilm. We wrap supply trunks with formaldehyde-free fiberglass insulation jacket, sealed at all seams, and add vapor barriers where humidity intrusion is severe. In buildings near the waterfront, this step is non-negotiable — the combination of outdoor humidity and indoor air conditioning creates condensation conditions that destroy ductwork from the outside in. Insulation work on a typical Everett system runs $350–$700.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Everett
We work with Honeywell and Aprilaire filtration and zoning components when duct repairs require integration with existing control systems — common in Everett’s larger multi-family buildings where landlords have upgraded thermostats but left original ductwork untouched. For sanitizing after repair, we use Guardsman antimicrobial treatments applied through pressurized foggers that reach the full duct interior. We don’t stock every part for every brand, but we carry mastic sealant, flex duct, sheet metal fittings, and insulation materials sized for the residential systems we encounter in 02149, which means most Everett repairs don’t wait on supplier delivery.
Common Duct Repair & Sealing Problems We See in Everett Homes
- Leaky ducts in uninsulated attics pull in humid outdoor air. In 1920s triple-deckers, supply trunks run through attic spaces never designed for HVAC. Summer humidity condenses on cold metal, and that moisture seeds mold that spreads through the entire system. We seal the leaks and add insulation to break the cycle.
- Original mastic tape dries and cracks within five years. The first-generation forced-air retrofits in Everett used tape products that degrade faster here than inland — the petroleum particulates and humidity accelerate adhesive failure. We remove old tape entirely and apply wet mastic with reinforcing mesh, which lasts the life of the duct.
- Sharp 90-degree bends create debris dead zones. Retrofitted duct runs in Everett’s triple-deckers often have bends forced by existing wall cavities. These corners collect the oily industrial grit and restrict airflow. We install smooth-radius transitions with access doors for future cleaning — a repair most duct cleaners skip because it takes longer.
- Shared systems complicate repair scheduling and tenant notification. A single cleaning visit in Everett often must address stacked systems serving multiple tenants under different lease arrangements. We coordinate with property managers and document which units were affected, when access was granted, and what repairs were made where.
Pricing for Duct Repair & Sealing in Everett, MA
| Service | Typical Range in Everett |
|---|---|
| Single leak repair (mastic seal) | $180–$280 |
| Full system mastic sealing (single unit) | $450–$850 |
| Flex duct replacement (per run) | $180–$340 |
| Metal duct repair with patch/fabrication | $220–$580 |
| Duct insulation (supply trunk wrap) | $350–$700 |
| Multi-unit building (per additional unit) | Add 60–75% of base |
What moves the price: access difficulty (crawl space vs. full basement), number of leaks found during pressurization testing, whether flex replacement requires rigid metal upgrade, and coordination complexity in multi-tenant buildings. We quote upfront after inspection — no open-ended hourly billing. Industrial particulate loading in Everett means we often find more leaks than standard inspection protocols catch, which is why we pressurize before we price. Call (888) 597-5659 for a free estimate; most Everett inspections take 30–45 minutes.
We Also Serve Cities Near Everett
We run regular routes to Malden, Chelsea, Revere, and Medford — but Everett’s industrial particulate and triple-decker housing stock create repair challenges we don’t see in those markets. If you’re in a neighboring city with similar retrofit ductwork, we apply the same techniques; if you’re in Everett, you get the benefit of our most specialized experience.
Serving Everett, MA — Our Local Coverage Area
We’re based in the Everett 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 Everett
They do. Everett sits immediately downwind of one of Massachusetts’ most concentrated industrial waterfronts — petroleum storage terminals, asphalt plants, and fuel depots line the Mystic River corridor, and state regulators have repeatedly designated Everett as one of the most environmentally burdened communities in the Commonwealth. Your HVAC intakes draw in a measurably heavier load of industrial particulates and hydrocarbon vapors than intakes in Medford or any neighboring city. Without thorough duct sealing, that grit bypasses filters and recirculates through your living space. Call (888) 597-5659 and we’ll pressurize-test your system to find where it’s getting in.
Yes, in most cases. We access metal supply trunks through basement mechanical rooms, attic openings, and existing register boots — the same paths the original retrofit installers used. We seal loose joints with mastic applied through extended wands and fabricate small access panels where needed. Wall demolition is a last resort, not a starting point. Call (888) 597-5659 for an inspection; Scott can usually assess access options in person.
Properly applied mastic sealant lasts 15–20 years, but in Everett’s conditions we recommend inspection every 7–10 years. The combination of humidity in basement mechanical rooms and vibration from oil-fired furnaces stresses joints more than in drier climates. If your building had tape-only sealing from an original retrofit, that likely failed within 5 years and needs full mastic replacement now. We document what we find and give you a realistic re-inspection timeline. Call (888) 597-5659 to schedule.
No, but it’s not uncommon in this part of Everett. The odor means your duct system has significant leaks pulling in outdoor air from near-grade intakes or crawl space vents, and that air carries hydrocarbon vapor from the petroleum terminal truck traffic. It’s a health concern, not a nuisance. We locate the entry points with pressurized smoke, seal them with mastic, and verify the fix with post-repair air sampling. Call (888) 597-5659 — this is exactly the problem we built our Everett practice around.
Crushed flex duct usually needs replacement — once the wire helix is deformed, airflow is permanently restricted and the inner liner tears. We remove the damaged run and often upgrade to rigid metal in attic applications, since Everett’s humidity makes flex duct vulnerable to repeat failure. If the insulation contractor caused the damage, we document with photos for your insurance or contractor dispute. Replacement typically runs $180–$340 per run. Call (888) 597-5659 for same-week service.
Written by Scott Gray, Owner at Everest Air Duct Cleaning Service Massachusetts, serving Everett since 2014.