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 Redlands
Duct sealing in Redlands typically runs $1,200 – $2,800 for a whole-home system, with most jobs completed in one day. If you’re losing cooled air through gaps in your ductwork, you’re paying to air-condition your attic or crawl space instead of your living rooms.
We’ve worked in Redlands long enough to know the difference between a downtown citrus-belt bungalow on a raised foundation and a 1970s ranch on the eastside. Our crews dispatch from the Inland Empire office and carry the tools to handle both: mastic and metal-backed tape for original wide-branching duct runs, and aerosol sealant injection rigs for longer rigid-metal tracts. Call us at (361) 326-5060 for a free estimate with a written price before any work starts.
Why Hollis Air Duct Cleaning Is Redlands’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our Redlands customers know what that means. The Garrison Standard requires written prices, written guarantees, and a 365-Day Done Right Promise on every job. If the seal fails within a year, we come back and make it right at no charge, including a free second visit.
Our technicians are background-checked and uniformed. You’ll know who’s arriving before they walk up your driveway. Phones are answered by a live person 24 hours a day, 7 days a week, not a voicemail loop or callback queue.
Roy Castellanos leads this operation, and the standard he sets is simple: arrive inside the quoted window, price it in writing before touching anything, complete the job by the book, and leave the site clean. No estimates that balloon once the technician is inside. That’s The Garrison Code, and it’s how we work in Redlands.
Duct Sealing Services in Redlands
Duct Sealing Services in Redlands cover the detection and permanent closure of leaks, gaps, and disconnected joints in your forced-air system. Most Redlands homeowners call us after noticing rooms that won’t cool evenly, utility bills that spike during July and August, or dust blowing from registers even after filter changes. A typical whole-home duct sealing job in Redlands runs $1,200 – $2,800 depending on system size, access, and whether we need to clean before sealing.
Leak Detection and Pressure Testing
We start every job with a static-pressure test and visual inspection, using smoke pencils and digital manometers to find exactly where your conditioned air is escaping. In Redlands’s older homes near the University of Redlands, we often find the worst leaks at original plenum connections and where wide-branching ducts meet the trunk line.
Mastic, Tape, and Aerosol Sealing Methods
Our crews apply duct sealing mastic, a thick water-based sealant that remains flexible for decades, to all accessible joints and seams. For longer rigid-metal runs in eastside tracts, we may recommend aerosol duct sealing, which pressurizes the system and seals leaks from the inside. Both methods are verified with post-seal pressure testing before we leave.
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 Redlands
Duct Insulation in Redlands addresses a separate problem from sealing: thermal loss through thin or degraded duct walls. Even sealed ducts lose efficiency if they’re uninsulated or wrapped in crumbling fiberglass, especially in attics that hit 140°F during Redlands’s summer afternoons. Adding or replacing insulation typically runs $800 – $1,800 for a Redlands home, depending on linear footage and access.
Attic and Crawl Space Wrap
We install foil-faced fiberglass or closed-cell foam insulation around sealed ductwork, with particular attention to trunk lines and plenums in Redlands’s raised-foundation bungalows. Proper insulation keeps 55°F conditioned air from warming before it reaches your vents.
Vapor Barrier and Condensation Control
In Redlands’s occasional humid periods and during monsoon push, uninsulated metal ducts sweat. We wrap with vapor-barrier-rated materials to prevent condensation that breeds mold and degrades surrounding structure.
Trusted Brands We Service in Redlands
Our trucks carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration products from Honeywell and Guardsman. We don’t use hardware-store gear. For Redlands customers, this means we stock the right mastic, metal-backed tape, and insulation wraps for local jobs without waiting on parts from Los Angeles. A typical sealing job uses Abatement Technologies HEPA filtration during any pre-clean, Guardsman-rated insulation where replacement is needed, and Rotobrush camera systems to verify the work. Fast turnaround matters when your system is down in 100-degree heat.
Common Duct Sealing Problems We See in Redlands Homes
- Original octopus-furnace ducts with open seams. In citrus-belt bungalows near downtown Redlands, we regularly find short, wide-branching duct runs from the 1920s – 1950s with dozens of original joints that have never been sealed. The seams pull Santa Ana dust and attic air straight into the system.
- Mastic applied over silt instead of metal. Sealing a raised-foundation duct without first source-removing the settled reddish-brown grit means the bond fails within a season. The mastic peels, the leak returns, and the homeowner pays twice.
- Shared return stacks in converted downtown apartments. Many downtown Redlands buildings were subdivided into condos or apartments without isolating duct systems. Sealing one unit’s trunk while ignoring the shared return leaves neighbors’ leakage pulling unconditioned air through the stack.
- Sealed ducts with unchecked static pressure. In eastside 1960s – 80s tracts, sealing rigid metal joints without verifying airflow can starve the air handler. The system short-cycles in Redlands’s 100°F+ summers, burning out compressors and failing to cool.
Pricing for Duct Sealing in Redlands, CA
A typical whole-home duct sealing in Redlands runs $1,200 – $2,800. Smaller systems in downtown bungalows with limited access often fall at the lower end. Larger eastside homes with extensive rigid-metal duct networks, or jobs requiring pre-cleaning of heavily silted systems, trend higher.
| Service | Typical Range in Redlands |
|---|---|
| Duct sealing, small system (under 1,500 sq ft) | $1,200 – $1,800 |
| Duct sealing, medium system (1,500 – 2,500 sq ft) | $1,800 – $2,400 |
| Duct sealing, large system or heavy pre-clean required | $2,400 – $2,800 |
| Duct insulation (add-on or separate) | $800 – $1,800 |
What moves the price: system size, accessibility (crawl space vs. attic), whether we need to clean before sealing, and whether shared building systems require coordination with other units. We give one flat price per system, agreed in writing before work starts. No per-vent pricing. No add-ons at the door. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Redlands
Our crews work throughout the Inland Empire. We regularly handle Duct Sealing in Redlands and nearby Loma Linda, Mentone, Colton, and Highland. Same written pricing, same 365-Day Done Right Promise, same live-answer scheduling in every community we serve.
Serving Redlands, CA - Our Local Coverage Area
We’re based in the Redlands 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 Redlands
Original bungalows near downtown and the University of Redlands were built with short, wide-branching duct runs and dozens of hand-formed joints that were never designed to be airtight. After a century of thermal cycling, those joints gape. Eastside tracts from the 1960s – 80s used longer rigid-metal runs with fewer connections, so leakage points are fewer and more accessible. Call (361) 326-5060 and we’ll inspect either type.
Yes, but shared returns and trunks require coordination. We inspect the full stack, seal accessible portions within your unit, and document any building-level leakage for your HOA or property manager. We don’t seal blindly and leave neighbors’ problems unaddressed. Call (361) 326-5060 to schedule a shared-system inspection.
Shared dryer vent stacks are a separate system from HVAC ducts, but they’re often intertwined in downtown conversions. If lint pathways cross unit lines, sealing your HVAC trunk without addressing the dryer stack leaves a pressure imbalance that pulls contaminants back through the building envelope. We inspect both during our initial assessment. Call (361) 326-5060 for a full evaluation.
We seal ducts year-round, but the work matters most before peak summer. Sealing in spring or fall means your system isn’t fighting 100°F+ days with one hand tied behind its back. Santa Ana winds deposit fine dust that infiltrates through gaps; sealing before wind season reduces the grit load your filters must handle. Call (361) 326-5060 to schedule before the next heat wave.
We test before and after. Our techs measure static pressure and run a smoke-pencil or digital leak detection at the start, complete the sealing, then retest. In Redlands’s older homes, we also run a Rotobrush camera inspection of key joints to confirm mastic coverage. Results are shown to you. If pressure hasn’t improved, we keep working. Call (361) 326-5060 for an estimate with written verification included.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Redlands and the Inland Empire since 2004.