Fast, Reliable Duct Repair & Sealing Across Highland
Duct repair and sealing in Highland, CA typically costs between $250 and $650 for most residential jobs, with same-day service available when you call before noon. We drive the 210 Freeway corridor to reach Highland homes from our dispatch point, and we know the difference between a ranch on Boulder Avenue and a hillside place off Greenspot Road. That matters because your ductwork problems are not generic. Call (855) 401-6006 for upfront pricing and a crew that shows up when we say we will.
We’ve worked Highland long enough to know the local pattern: original sheetmetal from the 1970s and 80s, attic temperatures that hit 140°F in July, and that gray-tan grit that shows up north of the freeway no matter how often you swap the filter. Our Duct Repair & Sealing team carries mastic sealant, R-8 insulation wrap, and replacement flex-duct sized for the older trunk lines common in this city. Most jobs finish in one visit.
Why Bellows Air Duct & Vent Co. of California Is Highland’s Preferred Duct Repair & Sealing Company
We’ve served the Inland Empire for over 42 years, and Highland has been on our route since the beginning. Roger Castañeda built this company on the idea that a homeowner should never need to call twice for the same problem. That still drives how we work in Highland today.
Our technicians are background-checked, uniformed, and trained on the specific failure modes of Highland’s housing stock. They know a 1978 ranch near Waterman Canyon needs a different approach than a 2005 tract home south of Base Line. We answer our phones with a live person 24 hours a day, not an app or a voicemail tree. When you call (855) 401-6006, you talk to someone who can dispatch a crew and give you a real arrival window.
Every job gets camera-inspected before and after. You see what we see. No claims without proof. Our 90-Day Done Right Promise means if the seal fails or the repair doesn’t hold, we return at no charge with no paperwork required. That’s been our policy since 1984.
We also honor a standing $50 off any repair over $250, a free second opinion on any written estimate, and a permanent 5% senior and veteran discount. The price we quote on the phone is the price on the invoice.
Our Duct Repair & Sealing Services in Highland
Duct Sealing
Highland’s Santa Ana wind events force ash, sand, and decomposed granite through every unsealed joint in your ductwork. We seal with professional-grade mastic, not tape that dries and cracks in attic heat. A typical duct sealing job in Highland runs $250-$450 for a single-story home, depending on access and linear footage. Homes near the mountain front often need more extensive sealing due to heavier particulate infiltration.
Metal Duct Repair
The original sheetmetal supply runs in Highland’s 1960s-1980s ranches corrode at joints and seams after decades of heat cycling. We cut out failed sections, fabricate replacements, and seal with mastic. Metal duct repair in Highland typically ranges from $300-$600. We recently repaired a 1970s ranch on Boulder Avenue where the original sheetmetal supply runs had corroded through at every joint, dumping unfiltered attic air into the living spaces. After cleaning out a half-inch of gray-tan grit, we sealed all seams with mastic and wrapped the trunk with R-8 insulation, our crew noted the change in air quality before we even packed up the Rotobrush.
Flex Duct Repair
Original flex-duct from Highland’s building boom years disintegrates under extreme attic temperatures. Tape repairs fail within a season here. We replace collapsed or torn flex with new insulated duct sized to your system’s static pressure. Expect $200-$400 per run in Highland, with most homes needing 2-4 runs addressed.
Duct Insulation
Uninsulated or degraded ductwork in a Highland attic loses 20-30% of conditioned air before it reaches your vents. We wrap supply trunks and exposed runs with R-8 insulation, secured and sealed at every seam. Duct insulation in Highland runs $350-$650 for a typical single-story home. The payback period shortens considerably given how many hours your system runs from May through September.
Mastic Sealant Application
This is our standard for every Highland job, not an add-on. Mastic remains flexible at temperature extremes and bonds to sheetmetal, flex-duct, and insulation. We brush it into every joint, seam, and penetration. The gray-tan grit we find in north Highland ducts abrades standard tapes; mastic is the only sealant we trust for this environment.
Air Leak Repair
Disconnected boots, crushed returns, and penetrations from old renovations are common in Highland’s aging housing stock. We locate leaks with camera inspection and pressure testing, then repair with permanent methods. Air leak repair in Highland typically falls between $200-$500.
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 Highland
We carry equipment from Nikro, Honeywell, and Aprilaire, the same brands serious HVAC contractors specify for Inland Empire installations. Our vans stock mastic, R-8 insulation wrap, and replacement duct components sized for Highland’s common trunk dimensions. That means no waiting on parts for most repairs. When we pull up to your place on Base Line or Greenspot Road, we’re carrying what we need to finish the job that day.
Common Duct Repair & Sealing Problems We See in Highland Homes
- Gray-tan grit contamination in north-side homes. Technicians working homes near the Waterman Canyon corridor consistently report duct interiors coated with a fine gray-tan grit, a mix of decomposed granite dust and wildfire ash, that differs visibly from the darker urban soot found in ducts on the city’s southern, freeway-adjacent streets. Standard filters cannot catch it all. Mastic sealing and upgraded filtration are necessary, not optional.
- Santa Ana wind recontamination through existing leaks. Santa Ana winds force fine ash and sand into existing duct leaks, recontaminating the home within weeks if mastic sealant is not applied to every joint. We see this every fire season in Highland.
- Original flex-duct disintegration from extreme attic heat. Original flex-duct from the 1970s-80s disintegrates under extreme attic heat here, causing rapid air loss that standard tape repairs cannot fix. Replacement with modern insulated flex-duct is the only lasting solution.
- Corroded sheetmetal at every joint in pre-1985 homes. The bulk of Highland’s residential stock consists of single-story ranch and tract homes built between the late 1960s and mid-1980s, many retaining original sheetmetal systems that have never been professionally serviced and show accelerated corrosion and joint separation from decades of extreme heat cycling.
Pricing for Duct Repair & Sealing in Highland, CA
We’re straightforward about numbers because we’ve seen what bait-and-switch pricing does to homeowners who just want the job done.
| Service | Typical Range in Highland |
|---|---|
| Duct sealing (mastic, whole system) | $250 - $450 |
| Metal duct repair (per section) | $300 - $600 |
| Flex duct replacement (per run) | $200 - $400 |
| Duct insulation (R-8 wrap) | $350 - $650 |
| Air leak repair (diagnosis + fix) | $200 - $500 |
| Combined repair + sealing package | $450 - $850 |
Factors that move you within these ranges: attic accessibility, extent of corrosion or damage, number of duct runs, and whether we need to address the gray-tan grit contamination common in north Highland homes. We inspect with a camera before quoting, so you see exactly what we see. Our $50 off any repair over $250 applies. Call (855) 401-6006 for a free estimate with no obligation.
We Also Serve Cities Near Highland
Our crews regularly travel the 210 and 330 corridors to reach Highland neighbors in San Bernardino, Muscoy, Redlands, and Loma Linda. Same standards, same live-answer phones, same upfront pricing. If you’re on the border between cities, call us and we’ll confirm coverage.
Serving Highland, CA - Our Local Coverage Area
We’re based in the Highland 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 Highland
Your filter cannot catch what enters through unsealed joints and corroded seams. Highland’s position at the base of the San Bernardino Mountains funnels decomposed granite dust and wildfire ash directly into return-air intakes during Santa Ana wind events. The gray-tan grit we find in north Highland ducts enters after the filter, through leaks in your ductwork itself. Sealing every joint with mastic and upgrading to a MERV 13 filter stops the cycle. Call (855) 401-6006 for a camera inspection, estimates are free.
Not necessarily. We replace corroded sections and seal the rest. Full replacement is only needed when the trunk line itself has failed structurally, which we can confirm with camera inspection. Most 1978 Highland ranches need strategic repair and comprehensive sealing rather than full replacement. We’ll show you exactly what we find and give you both options with prices before any work begins. Call (855) 401-6006 for a free second opinion on any written estimate.
Every 3-5 years for inspection, with sealing touch-ups as needed. Properties near Waterman Canyon or the mountain front face heavier particulate loads and more extreme temperature swings that stress duct joints faster than valley-floor homes. If you run HVAC to a detached workshop, that ductwork needs the same attention as your main house. We bundle inspections. Call (855) 401-6006 to schedule.
Yes. Sealed ductwork typically reduces cooling costs 15-25% in Highland’s climate, where systems run 8-12 hours daily from May through September. Unsealed ducts in a 140°F attic are essentially cooking your conditioned air before it reaches the vents. The savings often cover the repair cost within two summers. We can measure your leakage before and after with a pressure test. Call (855) 401-6006 for upfront pricing.
No. Duct repair and garage door systems are entirely separate. However, we do note that heavy-duty openers and springs on detached workshops can fail from heavier loads, and misalignment may tear adjacent duct boots if they share framing or wall penetrations. We inspect for this interaction during our camera survey and will point out any issues we see. For the door itself, you’d need a garage door specialist. Call (855) 401-6006 if you’d like us to check the duct-boot condition near your shop.
Ready to stop losing conditioned air to your attic? Call (855) 401-6006 now for a free estimate on duct repair and sealing in Highland. We’ll answer with a live person, give you a real arrival window, and show you camera footage of your ductwork before we quote a single dollar. That’s how we’ve worked since 1984.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co. of California, serving Highland since 1984.