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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Colton
We seal ducts in Colton homes where the real problem isn’t always dirt, it’s air leaking where it shouldn’t. If your utility bills keep climbing through July and August or certain rooms never cool down, disconnected or unsealed ductwork is usually the cause. Our Duct Sealing in Colton crews run out of the Inland Empire office and carry mastic, mesh, and replacement flex on every van, so most sealing jobs finish in a single visit. Call (361) 326-5060 for a free estimate with a written price before any work starts.
Why Hollis Air Duct Cleaning Is Colton’s Preferred Duct Sealing Company
We’ve been doing this since 2004, and the Garrison Standard hasn’t changed: show up inside the window, price it in writing, finish by the book, leave the site clean. Colton homeowners know the difference between a crew that tapes a joint and calls it done versus one that pressure-tests after sealing. Our technicians are background-checked, uniformed, and accountable. Every repair carries the 365-Day Done Right Promise in writing. If the seal fails or the connection separates within a year, we come back 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.
Duct Repair in Colton
Duct Repair in Colton often starts with a homeowner complaint that sounds like a cooling problem but traces back to the distribution system. We find crushed flex returns, disconnected sheet-metal trunk lines, and sagging attic runs that have pulled free from boots or plenums. In Colton’s market, typical duct repair runs $280 – $580 for reconnecting and sealing separated runs, and $650 – $1,200 when we need to replace crushed or deteriorated flex duct sections and re-support them properly.
Slab-Floor Disconnections
Original sheet-metal supply trunks in south Colton’s 1950s-70s slab homes separate at joints after decades of thermal cycling. We cut access, rejoin the trunk with mechanical fasteners, then seal every joint with mastic and mesh so the connection holds.
Attic Flex Replacement
North-side two-story homes from the 1990s and 2000s run long flex duct through hot attic chases. The material sags, tears at stress points, and collects debris. We replace damaged sections, re-support with proper strapping, and seal to the plenum so air reaches the register instead of the attic.
Air Duct Sealing in Colton
Air Duct Sealing in Colton is the step that actually fixes the pressure loss and contamination cycle. We seal supply and return joints, plenum connections, and register boots using duct-sealing mastic reinforced with fiberglass mesh, not foil tape that peels off in attic heat. In Colton, a typical whole-system sealing job runs $450 – $850 for a single-story home with accessible ductwork, and $750 – $1,400 when we need to open soffits or chase walls to reach disconnected runs in slab-floor construction.
Mastic and Mesh Method
We brush mastic, a thick water-based sealant, onto every joint and seam, then embed mesh for structural reinforcement. It cures flexible and permanent, rated for the temperature swings Colton attics see between January and August.
Pressure Testing After Sealing
Once sealing is complete, we run a duct blaster or static pressure check to verify the system holds pressure. You see the numbers. We don’t guess.
Trusted Brands We Service in Colton
Our vans carry sealing and filtration products from Aprilaire, Abatement Technologies, and Guardsman, plus rotary brush systems from Rotobrush for the agitation work that precedes sealing. We stock common flex diameters, mastic, mesh, and register boots locally, so Colton jobs don’t wait on parts orders. When a north-side two-story needs new flex in an attic chase or a south-side slab home needs a plenum reseal, the material is already on the van.
Common Duct Sealing Problems We See in Colton Homes
- Original sheet-metal joints separating under thermal stress. In the neighborhoods south of the 10 freeway, 1950s-70s slab-floor homes have duct joints that open and close with every heating and cooling cycle. Cajon Pass grit pours straight into the gap, and the homeowner notices dust pouring from registers or rooms that won’t hold temperature.
- Flex duct sagging and tearing in north-side attics. The 1990s-2000s two-story builds in north and northeast Colton run flex through attic chases where summer temperatures exceed 140 degrees. The material softens, sags over time, and tears at bends or support points, creating open leaks that bypass conditioned space entirely.
- Greasy particulate film in freeway-adjacent homes. East-side Colton neighborhoods near the 215/10 interchange pull brake dust and road particulate alongside Cajon Pass wind grit. The combination coats duct interiors with a dark, greasy layer that standard vacuuming won’t remove. Sealing without agitation and source removal traps that contamination in the system.
- Crushed returns at the air handler. In older homes where the original installer routed flex too tight to the plenum, the return collapses under negative pressure. The system starves for air, the coil ices, and the homeowner pays for compressor repairs when the real fix is a properly sized and sealed return duct.
Pricing for Duct Sealing in Colton, CA
Most Colton homeowners want to know what duct sealing costs before they schedule. Here’s what we see in this market:
- Duct sealing, whole system, accessible single-story: $450 – $850
- Duct sealing with chase or soffit access work: $750 – $1,400
- Duct repair, reconnecting separated runs: $280 – $580
- Duct repair with flex replacement and re-support: $650 – $1,200
- Register boot reseal and replacement (per boot): $85 – $150
These are whole-system prices, not per-vent teaser rates that balloon once the technician is inside. We inspect first, write the price down, and get your approval before touching anything. The price does not move at the door. Every job includes the 365-Day Done Right Promise. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near Colton
Our Duct Sealing crews work throughout the Inland Empire. We regularly schedule jobs in Grand Terrace, Loma Linda, Riverside, and San Bernardino from the same dispatch office that handles Colton, so neighboring city appointments book with the same written pricing and the same crew standards.
Serving Colton, CA - Our Local Coverage Area
We’re based in the Colton 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 Colton
They need agitation and source removal first because the dark, greasy film coating those ducts defeats standard vacuuming. The particulate is a mix of Cajon Pass wind grit and freeway brake dust that bonds to metal and flex surfaces. We run Rotobrush rotary agitation and Nikro negative-air HEPA extraction to strip that film, then seal so contaminants aren’t trapped inside. Call (361) 326-5060 if your east-side Colton home has persistent dust or musty smells.
Most can be sealed if the metal is structurally sound. We cut strategic access, rejoin separated joints with mechanical fasteners, and seal with mastic and mesh. Replacement only becomes necessary when the metal has corroded through or the original design is so poorly routed that sealing won’t restore airflow. We inspect and give you a written price for both options before any work starts.
Attic temperatures in north Colton’s 1990s-2000s builds regularly exceed 140 degrees from June through September, softening flex duct insulation and causing sagging at unsupported spans. Sagging creates turbulence, debris accumulation, and eventual tearing at stress points. We re-support with proper strapping, replace damaged sections, and seal to prevent the cycle from repeating.
Most Colton homes do well with MERV 8 – 11 filters, changed every 60 – 90 days in peak summer. Higher MERV ratings restrict airflow in older systems and can actually increase static pressure, stressing the blower. During Santa Ana wind events or if you live near the 215/10 interchange, check monthly. We evaluate your system’s capacity and recommend the right filtration during every sealing job.
Proper sealing reduces dust by stopping the system from pulling attic air, crawl space air, and wall cavity air through leaks. In Colton’s older homes, unsealed return leaks are often the primary dust source, not the supply. After we seal and pressure-test, homeowners typically notice less dust accumulation on surfaces within two to three weeks of normal HVAC cycles.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Colton and the Inland Empire since 2004.