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 Clovis
We’re the Duct Sealing in Clovis crew that shows up when we said we would, prices the job in writing before we touch anything, and seals your ducts by the book. Our dispatch runs from the Fresno, Central Valley office, and our trucks cover Clovis neighborhoods from the older west-side streets near Old Town to the newer northeast subdivisions off Herndon and Temperance. Call us at (361) 326-5060 for a free estimate.
Why Hollis Air Duct Cleaning Is Clovis’s Preferred Duct Sealing Company
We’ve been doing this since 2004 as part of the Garrison Partners family, and our 365-Day Done Right Promise means if the seal fails, we come back and make it right at no charge. That includes a free second visit. Our technicians are background-checked, uniformed, and held to The Garrison Code: arrive inside the window, price in writing, leave the site clean.
Our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
HVAC Duct Sealing in Clovis
HVAC Duct Sealing in Clovis is the process of closing gaps, disconnected joints, and deteriorated collar connections in your forced-air system so the air you’ve already paid to heat or cool actually reaches the rooms it’s supposed to. If your dryer vent also needs attention, we offer Clovis Dryer Vent Cleaning as well. In Clovis, we see two very different sealing challenges: pre-1970 downtown and west-side homes with original galvanized steel ducts that have separated at the seams after decades of expansion and contraction, and northeast subdivisions built from the 2000s onward where flexible duct inner liners have torn or collapsed at the plenum collar after years in 140°F+ attic heat.
A typical HVAC duct sealing job in Clovis runs $450 – $1,200 for a single-system home, depending on how many runs need attention and whether we can access them through existing registers or need to open ceiling or attic access points. Two-system homes common in the northeast tracts start around $800 and can reach $1,800 if both air handlers have multiple failed collar connections.
Sealing Galvanized Ducts in Older Clovis Homes
Pre-1970 homes near Old Town, along Shaw Avenue west of Highway 168, or south of Bullard often have rigid galvanized ductwork in shallow crawlspaces. The seams were originally sealed with fabric tape that dries out and peels. We remove the old tape, clean the joint surface, and apply duct sealing mastic with reinforcing mesh for a permanent seal that won’t degrade again in our dry Central Valley climate.
Re-Collaring Flex Duct in Northeast Clovis Attics
In subdivisions off Herndon, Temperance, and Copper, we find flex duct inner liners torn where they meet the plenum collar. Sealing tape alone won’t hold. We cut back to sound liner, install a new collar with mechanical fastening, seal with mastic, and support the flex to prevent future stress at the connection point.
Duct Repair in Clovis
Duct Repair in Clovis goes beyond sealing when the duct material itself has failed: crushed flex runs, collapsed inner liners shedding fiberglass into your air, or rusted-out galvanized sections that are leaking air and drawing attic or crawlspace contaminants into the system. We don’t just patch over damage. We identify what caused it and fix it so it stays fixed.
Duct repair in Clovis typically runs $350 – $950 for partial replacement of failed sections, and $1,100 – $2,400 for more extensive rebuilds of multiple runs or both systems in a two-story home. Every repair gets a written price before we start and is covered by our 365-Day Done Right Promise.
Inner Liner Replacement for Fiberglass Contamination
When the flex inner liner has degraded enough to shed particles into your supply air, sealing the outside won’t stop the problem. We remove the failed section, replace with new insulated flex duct rated for high-temperature attic use, and seal all connections with mastic. We then run a camera inspection to confirm no liner debris remains in the air handler or downstream runs.
Galvanized Duct Section Replacement
Rusted or heavily damaged galvanized sections in older Clovis homes get cut out and replaced with new sheet metal, sealed at every joint, and insulated if they’re in unconditioned spaces. We match the original duct size to maintain proper airflow balance for your system.
Trusted Brands We Service in Clovis
Our Duct Sealing teams carry professional-grade equipment and materials from Nikro, Honeywell, Aprilaire, and Abatement Technologies. For Clovis homeowners, that means we stock the right collar fittings, mastic compounds, and replacement flex duct for the high-heat attic conditions common here. We don’t run back to Fresno for parts mid-job. Our trucks are loaded for the specific failure modes we know we’ll find in Clovis: heat-degraded flex liners, baked-on dust in galvanized systems, and the two-system configurations that need matched components. Turnaround on most repairs is same visit because we planned for your home before we arrived.
Common Duct Sealing Problems We See in Clovis Homes
- Collapsed flex liner at the plenum collar in northeast tracts. The 140°F+ attic heat in Clovis subdivisions off Herndon and Temperance degrades the adhesive bond at the collar connection. Fast-built tract homes from the 2000s – 2010s often had minimal mechanical fastening at this joint. We re-collar with proper support and mastic seal.
- Baked-on dust layer in pre-1970 galvanized ducts. Decades of Central Valley dust, combined with summer heat cycling, fuses a hard layer onto galvanized duct walls in downtown and west-side Clovis homes. Sealing alone won’t restore airflow if this buildup has narrowed the duct. We assess with camera inspection and break it loose with agitation tools before sealing.
- Disconnected second-floor flex runs in two-system homes. Northeast Clovis two-stories often have a second air handler in the attic with flex runs buried under blown insulation. A disconnected run here keeps leaking conditioned air even after visible ducts are sealed. We map the full system and verify airflow at every register.
- Seam separation in crawlspace galvanized from ground moisture. Older Clovis homes with shallow crawlspaces, especially near Dry Creek, can have galvanized seams corroded from decades of seasonal moisture. We replace failed sections and seal remaining intact joints with mastic rated for damp conditions.
Pricing for Duct Sealing in Clovis, CA
We’re upfront about what duct sealing costs in Clovis because we’ve seen too many homeowners get a low phone quote that doubles once the technician is inside. That doesn’t happen here. The price is written down before any work starts, and it does not move at the door.
| Service | Typical Range in Clovis |
|---|---|
| Single-system duct sealing (seal accessible joints, collar repairs) | $450 – $1,200 |
| Two-system duct sealing (northeast tract homes) | $800 – $1,800 |
| Partial duct repair (section replacement, re-collaring) | $350 – $950 |
| Extensive duct repair/rebuild (multiple runs, both systems) | $1,100 – $2,400 |
| Camera inspection and airflow verification | $150 – $250 (included with sealing/repair) |
What moves the price: how many runs need attention, whether we need to open access points, if liner replacement is required versus simple sealing, and whether we’re working around blown insulation in northeast attics or tight crawlspaces downtown. Every estimate is free. Call (361) 326-5060 and we’ll give you a straight answer.
We Also Serve Cities Near Clovis
Our crews work throughout the Central Valley. We regularly do duct sealing and repair in Clovis, Fresno, Sanger, Fowler, and Madera. Same standards, same written pricing, same 365-Day Done Right Promise at every stop.
Serving Clovis, CA - Our Local Coverage Area
We’re based in the Clovis 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 Clovis
The combination of 140°F+ attic temperatures from June through September and minimal mechanical fastening during fast tract construction degrades the adhesive bond at the collar. The inner liner tears or collapses, shedding fiberglass into your supply air. This is the single most common duct failure we see in homes off Herndon, Temperance, and Copper. Call (361) 326-5060 for a camera inspection if you’re seeing white dust around registers or smelling hot fiberglass.
Sealing can fix separated seams and small leaks in intact galvanized ductwork, but many pre-1970 Clovis homes have a baked-on dust layer or rust damage that sealing alone won’t address. We camera-inspect first. If the ducts are structurally sound, we seal with mastic and mesh. If they’re degraded, we quote repair or section replacement with the same written upfront price. Call (361) 326-5060 for a free assessment.
Leaks usually show as uneven temperatures between rooms, high energy bills, or dust blowing from registers. A failed inner liner adds visible white fiberglass particles around vents, a chemical or hot-plastic smell when the system runs, or respiratory irritation that worsens when you’re home. We run a camera through the duct to confirm which problem you have before quoting any work. Call (361) 326-5060 to schedule.
Sealing closes gaps and joints in intact duct material. Repair replaces failed material: torn flex liner, crushed runs, rusted galvanized sections. On a typical Clovis northeast tract home, we might seal 80% of the system and repair two collar connections where the liner has torn. We quote each separately so you know exactly what you’re paying for. Call (361) 326-5060 for an exact breakdown on your home.
Two-system homes have twice the ductwork and twice the failure points, especially when the second air handler is in a 140°F attic with flex runs buried under insulation. We’ve found disconnected second-floor runs in Clovis homes where the owner had already paid another company to “seal the ducts” but the buried runs were never checked. We map and verify every run. Call (361) 326-5060 for a complete system inspection.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Clovis since 2004.