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 Madera
Duct sealing in Madera typically runs $850 – $2,400 for a whole-home job, depending on whether we’re sealing accessible joints in a crawlspace or chasing leaks through walls in a pre-1980 bungalow. Our crews dispatch from the Fresno office and are usually on-site in Madera within the same week you call. We know the local housing stock, the seasonal dust loads, and the specific ways Central Valley heat and agricultural particulate punish duct systems here. Call (361) 326-5060 for a free written estimate before any work starts.
We’ve worked on homes from the older downtown bungalows near Yosemite Avenue to the post-war tract houses off Highway 99. Madera’s climate and its surrounding orchard country create duct problems you won’t find in coastal California. Our Duct Sealing in Madera crews arrive uniformed, background-checked, and equipped with professional-grade tools from Rotobrush and Nikro. The price we write down before we start is the price you pay. No per-vent add-ons, no ballooning at the door.
Why Hollis Air Duct Cleaning Is Madera’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. That track record predates most competitors you’ll find in Madera today. We operate under The Garrison Standard: arrive inside the quoted window, price in writing, complete the job by the book, leave the site clean. Our 365-Day Done Right Promise covers every duct sealing job in writing. If the seal fails or a leak reopens within a year, we return and make it right at no charge, including a free second visit.
Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday for a scheduling answer. Technicians are background-checked and uniformed; you know who is walking into your home before they arrive. In Madera specifically, we’ve built our reputation on showing up when we said we would and pricing the job before we touch anything. That’s The Garrison Code in action.
We don’t compete on the lowest teaser price. We compete on discipline: written prices, written guarantees, and accountability you can verify. When you’re inviting someone into your home to work on the system that moves your air, that matters.
HVAC Duct Sealing in Madera
HVAC Duct Sealing in Madera means finding and closing the gaps, cracks, and disconnected joints that let conditioned air escape into your attic, crawlspace, or walls before it ever reaches your rooms. In a typical Madera home, especially the pre-1980 stock common here, we see supply ducts leaking 20 – 30% of their airflow. You’re paying to cool or heat your crawlspace. Sealing restores that airflow to your living space, reduces blower motor runtime, and can drop your summer electric bills measurably during those months when Madera hits 105 degrees and your system runs almost nonstop.
A standard whole-home duct sealing job in Madera runs $850 – $1,800 for accessible ductwork in a crawlspace or basement. If we need to access leaks inside walls, chase disconnected runs, or seal after significant repair work, costs can reach $2,000 – $2,400. We always inspect with a camera first. Sealing over a crushed or disconnected flex run, common in post-war tract homes, just hides the real problem.
When Sealing Becomes a Repair Job
Sometimes what starts as a sealing call turns into repair. We find disconnected trunks, collapsed flex, or rodent damage too extensive for mastic alone. Our Duct Sealing team will show you the camera footage, explain what we found, and give you a written price for the full fix before we proceed. No surprises.
Materials That Hold Up in Madera’s Climate
Madera’s hot-dry temperature swings, 40 degrees or more between summer days and winter nights, cause duct materials to expand and contract. We use mastic and reinforced tape rated for thermal cycling, not the hardware-store foil tape that cracks within a season on original sheet-metal joints.
Duct Repair in Madera
Duct Repair in Madera addresses the physical damage that sealing alone cannot fix: crushed flex runs, disconnected supply trunks, corroded sheet metal, and rodent-chewed sections. Much of Madera’s housing was built before 1980, with many older homes still using original sheet-metal or flex duct systems that have accumulated decades of wear. The mix of older downtown bungalows and post-war tract homes often means ducts are undersized, poorly supported, or physically damaged by the time we arrive. Repair costs in Madera typically range from $400 – $950 for a section replacement or reconnection, and $1,200 – $2,800 for more extensive rebuilds of multiple runs or plenum work.
We don’t guess. We run a camera through the system first, show you what we found, and write down the repair price before we cut or seal anything. That’s The Garrison Standard.
Common Damage in Older Madera Homes
On a post-war tract home near downtown Madera, our tech found a crushed flex run off the air handler and two disconnected supply ducts that had been dumping conditioned air into the crawlspace for years. After agitation tools and negative pressure pulled out decades of dust and a handful of almond hulls, we sealed the runs and reconnected the supply trunks; the blower motor no longer ran nonstop on 105-degree afternoons. We left the registers balanced and the homeowner breathing easier.
Repair Before Sealing
Sealing a damaged duct is like patching a tire with a nail still in it. We repair first, then seal. The 365-Day Done Right Promise covers both: if a repair we made fails within a year, we return at no charge.
Trusted Brands We Service in Madera
Our Madera crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies. Rotobrush rotary brush systems agitate debris loose from duct walls; Nikro negative-air machines maintain suction so nothing escapes into your home during the job. For filtration upgrades tied to sealing work, we stock Honeywell, Aprilaire, and Guardsman products. We don’t use hardware-store gear. These are the same tools commercial crews use, maintained and calibrated for residential jobs. Parts for common Madera systems are on our trucks, so most repairs don’t wait for a supply run to Fresno. When we seal your ducts, we do it with materials and methods that last.
Common Duct Sealing Problems We See in Madera Homes
- Crushed or disconnected flex runs in post-war tract homes. These often sit unsupported in crawlspaces, sagging until they separate at the collar or collapse entirely. Sealing over them without camera inspection hides the real leak and leaves supply and return ducts dumping air into crawlspaces.
- Mastic or tape applied to original sheet-metal joints on pre-1980 bungalows that flex with Madera’s hot-dry swings. Cheap materials crack within a season and re-open the leak. We use reinforced, thermally rated products that move with the metal.
- Rodent-stashed almond and walnut hull debris inside original ducts. In Madera, this is a recurring fall discovery driven by the surrounding orchards. Sealing without first removing that debris just traps the problem behind panels, where it continues to degrade air quality and attract pests.
- Undersized ducts from original construction. Many Madera homes were built with ducts too small for modern HVAC loads. Sealing helps, but sometimes we need to upsize a run or add a return to solve the root problem. We tell you straight when that’s the case.
Pricing for Duct Sealing in Madera, CA
Whole-home duct sealing in Madera typically costs $850 – $1,800 for standard crawlspace or basement access. Complex jobs with wall access, multiple repairs, or extensive reconnection work run $2,000 – $2,400. Duct repair, when needed before sealing, adds $400 – $950 per section or $1,200 – $2,800 for larger rebuilds. What moves the price: accessibility (crawlspace height, attic temperature), extent of damage found during camera inspection, and whether we need to remove debris or pest contamination before sealing.
We give one flat price per system, agreed in writing before work starts. No per-vent pricing. No add-ons at the door. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Madera
Our Fresno-based crews also handle Madera area calls from Fresno, Clovis, Kerman, and Chowchilla. Same equipment, same written pricing, same 365-Day Done Right Promise. Scheduling is coordinated from our Central Valley office, with local technicians dispatched to your area.
Serving Madera, CA - Our Local Coverage Area
We’re based in the Madera 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 Madera
Madera’s combination of pre-1980 housing stock, extreme summer heat, and surrounding agricultural dust creates more severe duct leakage problems than you’ll find in newer or coastal cities. Hot, dry summers push HVAC systems to run constantly for months, circulating dust and allergens, while agricultural activity and winter inversions trap particulate matter that infiltrates ductwork through every gap. Sealing matters more here because your system works harder, longer, and pulls more outside contamination through leaks. Call (361) 326-5060 for a free inspection and written estimate.
We find decades of accumulated dust, degraded insulation, and in fall especially, almond and walnut hull debris that rodents have stashed inside original sheet-metal and flex ducts. In Madera, this is a seasonal nuisance driven by the surrounding orchards. We also see crushed flex runs, disconnected supply trunks, and corroded sheet metal from pre-1980 construction. Call (361) 326-5060 and we’ll show you exactly what your system contains.
Yes, we seal original sheet-metal ducts regularly in Madera’s older homes. The key is using mastic and reinforced tape rated for thermal cycling, not cheap foil tape that cracks as the metal expands and contracts with Madera’s 40-degree day-night swings. We also inspect with a camera first to confirm the metal is intact and not corroded through. If repair is needed, we price it separately in writing before we start. Call (361) 326-5060 to schedule.
Yes, if there is debris, rodent contamination, or accumulated dust inside. Sealing over almond hull debris, pest droppings, or heavy accumulation traps those contaminants in your system and can worsen air quality. In Madera, where rodent-stashed orchard debris is common in fall, we almost always clean before sealing. We use Rotobrush agitation tools and Nikro negative-air machines to remove everything, then seal clean ducts. The camera inspection tells us what’s inside before we decide. Call (361) 326-5060 for a free assessment.
We run a camera through the system and take static pressure readings. High static pressure with visible gaps at joints or collars indicates sealing. Restricted airflow with heavy debris buildup, crushed runs, or disconnected trunks indicates cleaning or repair, or both. In Madera’s older homes, we often find both problems together. We show you the footage, explain what we found, and give you a written price for the right fix. Call (361) 326-5060 and we’ll diagnose it properly.
Ready to stop paying to cool your crawlspace? Call (361) 326-5060 for a free written estimate on duct sealing in Madera. We’ll inspect your system with a camera, show you what we found, and give you one flat price before any work begins. Every job is covered by our 365-Day Done Right Promise. If it’s not done right, we make it right. That’s The Garrison Standard.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Madera and the Central Valley.