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 Mendota
Duct sealing in Mendota typically runs $400 – $900 for a whole-house seal on single-story homes, with most jobs completed in a single visit once the estimate is approved. Our crews dispatch from the Fresno office and carry the mastic, mesh, and mechanical fasteners needed for the older galvanized and flex ducting common in Mendota’s housing stock.
We’ve worked on enough homes near Belmont Avenue and along the older blocks off Derrick Avenue to know what the agricultural soil from Westlands fields does to duct seams here. It’s not generic dust. The particulate is fine enough to infiltrate, abrasive enough to lift tape, and persistent enough that sealing without proper surface prep fails within a season. That’s why our Duct Sealing team starts with source removal and mechanical fastening before any sealant goes on. If you’re seeing dust blow from registers after spring dust storms, or rooms that never cool evenly through a Mendota summer, the problem is often failed seals at joints and collars rather than a dirty duct. Call (361) 326-5060 for a free estimate and we’ll show you exactly where your system is leaking.
Why Hollis Air Duct Cleaning Is Mendota’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our Central Valley crews have handled enough Mendota jobs to recognize the patterns. The 1950s – 1980s stucco and wood-frame homes that dominate this city, especially the rental stock near the west side, share the same duct problems: original galvanized with pinhole leaks, flex duct crushed in crawlspaces, and collar connections that separated years ago but only get noticed when a dust storm fills the house with visible particulate.
Our technicians are background-checked and uniformed, and they arrive inside the quoted window. The price is written down before any work starts. Every repair is covered by our 365-Day Done Right Promise – if the seal fails within a year, we return and make it right at no charge, including a free second visit. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
We don’t compete on teaser coupons. We compete on showing up, pricing it straight, and doing it by the book under The Garrison Standard.
Duct Repair in Mendota
Duct Repair in Mendota means fixing the mechanical failures that make sealing impossible – crushed flex runs, disconnected collars at the air handler, and separated seams in original galvanized duct that tape alone won’t hold. Most Mendota homeowners need duct repair when they notice uneven cooling, whistling from registers, or dust that returns immediately after cleaning. A typical duct repair in Mendota runs $300 – $700 depending on accessibility and whether we’re rebuilding a single run or multiple joints. We always inspect with a camera first so you see the failure before we quote the fix.
Crushed and Disconnected Runs
In the crawlspaces of west-side rentals, we regularly find flex duct that has been crushed by foot traffic or sagging so long it’s pulled free at the collar. Sealing the visible duct in these cases traps debris behind the break and wastes your money. We rebuild or replace the damaged section, mechanically fasten the connection, then seal.
Galvanized Seam Separation
Original galvanized duct in Mendota’s 1960s and 1970s homes has hundreds of pinhole leaks and separated longitudinal seams. Tape alone lifts within a season under the pressure and temperature swings of a Central Valley summer. We mechanically fasten first, then seal with mastic and mesh for a repair that holds.
Air Duct Sealing in Mendota
Air Duct Sealing in Mendota addresses the leaks that let conditioned air escape into attics and crawlspaces while pulling in unfiltered air from those same spaces. Because Mendota sits downwind of Westlands farm fields, the fine agricultural soil that infiltrates forced-air systems is abrasive enough to wear at seam tape and flex-duct collars, so sealing failures here show up earlier and more often at joints rather than at the register boots. A typical whole-house air duct sealing in Mendota runs $400 – $900 for single-story homes with accessible ductwork. We seal supply and return ducts, not just the visible registers.
Source Removal Before Sealing
Agricultural soil is fine enough to work under sealant edges if the surface isn’t cleaned first. We use negative-air methods and rotary brush agitation to remove debris to source, then seal. Skip this step and the sealant lifts prematurely. We don’t skip it.
Mastic and Mesh Application
We seal with mastic – a thick, flexible compound – reinforced with mesh at joints and collars. It flexes with temperature changes and holds under the pressure of a running system. Duct tape, by contrast, dries and fails. We don’t use it as a primary seal.
Trusted Brands We Service in Mendota
Our trucks carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, plus filtration and sealing products from Aprilaire and Guardsman. For Mendota homeowners, this means we stock the collars, mastic, and mesh needed for same-day repair and sealing on most jobs, without waiting on parts from Fresno or beyond. The rotary brush systems handle the source removal that must precede any lasting seal. The negative-air machines keep debris contained during the process. And the Aprilaire and Guardsman filtration products we install give you a defense against the next dust storm. We don’t show up with hardware-store tape and hope for the best.
Common Duct Sealing Problems We See in Mendota Homes
- Pinhole leaks in original galvanized duct. The 1950s – 1980s housing stock throughout Mendota, especially near Belmont Avenue and the older blocks off Derrick Avenue, contains galvanized duct with hundreds of tiny leaks and separated seams. Tape alone won’t hold. Joints must be mechanically fastened first, then sealed with mastic and mesh.
- Crushed flex duct under west-side rentals. Cheap flex runs in crawlspaces get crushed by maintenance traffic or sag until they disconnect at the air handler collar. Sealing the visible duct just traps debris behind the break. We rebuild the run, then seal.
- Premature sealant lift from agricultural soil infiltration. The fine soil that blows off Westlands fields is abrasive enough to work under sealant edges if the surface isn’t cleaned to source first. We see this failure mode most often after spring dust storms in homes that were sealed without proper prep.
- Disconnected returns pulling in crawlspace air. Return duct leaks are harder to detect because the register still blows, but the system is pulling unfiltered air from the attic or crawlspace. We inspect returns with cameras and seal them the same as supplies.
Pricing for Duct Sealing in Mendota, CA
A typical duct sealing job in Mendota runs $400 – $900 for a whole-house seal on a single-story home with accessible ductwork. Duct repair, when needed before sealing, adds $300 – $700 depending on how many runs need rebuilding. Factors that move the price: accessibility (crawlspace height, attic temperature), extent of damage (single joint versus multiple crushed runs), and whether source removal is required before sealant can adhere.
We give one flat price per system, agreed in writing before any work starts. No per-vent pricing. No add-ons at the door. You’ll see the camera footage of your leaks, get a written quote, and approve it before we begin. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Mendota
Our Central Valley crews handle Duct Sealing in Mendota and surrounding communities including Firebaugh, Kerman, Chowchilla, and Madera. Each job carries the same written price guarantee and 365-Day Done Right Promise, whether we’re working on a Mendota rental near the west side or a ranch home outside Firebaugh.
Serving Mendota, CA - Our Local Coverage Area
We’re based in the Mendota 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 Mendota
It’s usually both, but sealing is often the root fix. When return ducts leak in the crawlspace or attic, the system pulls in unfiltered air – including agricultural soil – and distributes it through your registers. Cleaning removes what’s there, but sealing stops new infiltration. In the older rental blocks near the west side of town, we find that dust storms trigger complaints because leaks that were minor all winter suddenly pull in visible volume. Call (361) 326-5060 and we’ll camera-inspect to show you where the leaks are.
Most galvanized duct in 1970s Mendota homes can be sealed if the metal is intact. The issue is usually hundreds of pinhole leaks and separated longitudinal seams, not rust-through. We mechanically fasten the seams, then seal with mastic and mesh. Replacement becomes necessary only when sections are crushed, corroded through, or inaccessible. We’ve saved Mendota homeowners thousands by sealing rather than replacing. Call (361) 326-5060 for a camera inspection and we’ll give you an honest assessment.
Because the leaks are invisible until the particulate load gets high enough to blow visible dust from registers. In Mendota’s older rental stock, especially near the west side, landlords often don’t maintain HVAC systems proactively. Tenants live with uneven cooling and minor dust until a spring dust storm makes the problem undeniable. Then we get the call. We document with camera footage so tenants and landlords both see the failure. Call (361) 326-5060 – we work with property owners and tenants.
We seal both. Return leaks are actually more damaging to air quality because the system is pulling unfiltered air from attics and crawlspaces under negative pressure. Supply leaks waste energy and create uneven temperatures, but return leaks introduce the agricultural soil and other contaminants that Mendota homeowners notice most. Our whole-house seal includes both sides. Call (361) 326-5060 for an estimate that covers your complete system.
We start with a camera inspection so you see the leaks. Then we clean to source removal – negative-air HEPA containment plus rotary brush agitation – so sealant will adhere. Next we mechanically fasten any separated joints or collars. Finally we apply mastic reinforced with mesh at every leak point. The job typically takes 4 – 6 hours for a single-story Mendota home. You get before-and-after photos of your own ducts, a written invoice matching the written estimate, and coverage under our 365-Day Done Right Promise. Call (361) 326-5060 to schedule.
On a 1960s stucco rental near the west side of town, our tech pulled a camera inspection and found a crushed run of original galvanized duct in the crawlspace plus disconnected flex at the air handler collar. We started with negative pressure and HEPA filtration, used agitation tools to complete source removal on the supply and return ducts, then rebuilt and sealed the failed joints with mastic and mesh. The tenant’s complaint about dust blowing from the registers stopped after the next dust-off-the-fields week.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Mendota and the Central Valley since 2004.