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 Canyon Lake
We’re the crew Hollis Air Duct Cleaning sends to Canyon Lake when homeowners notice rooms that won’t hold temperature, dust that keeps coming back, or energy bills that climb for no clear reason. Our dispatch runs out of the Inland Empire office, and we’ve made the drive up Highway 74 enough times to know which lakefront roads narrow after rain and which hillside driveways need a smaller service vehicle. We answer calls live, 24 hours a day, at (361) 326-5060. If you’re in Canyon Lake Shores, North Shore, or up in the hills off FM 306, we’ll give you a written price before we start and stand behind the work for a full year.
Why Hollis Air Duct Cleaning Is Canyon Lake’s Preferred Duct Sealing Company
We’ve been doing this since 2004 as part of the Garrison Partners family, and our Canyon Lake customers come back because the price on the paper matches the price at the door. No bait, no switch. Our technicians are background-checked, uniformed, and expected to operate by The Garrison Code: arrive inside the window, price in writing, finish by the book, leave the site clean. The 365-Day Done Right Promise means if a seal fails or a connection separates within a year, we return and make it right at no charge, including a free second visit. That’s not a slogan. It’s written on every job.
We know the local housing stock here. The 1970s lake cabins with flex duct in crawlspaces. The custom hill-country homes with multiple returns and heat pumps working overtime through July. The double-wides where original ductwork has been leaking into unconditioned space for decades. That knowledge changes what we look for and how we fix it.
Air Duct Sealing in Canyon Lake
Air Duct Sealing in Canyon Lake means finding every leak, gap, and separated joint in your supply and return ductwork, then sealing them with mastic and reinforced mesh so conditioned air reaches the rooms it’s supposed to reach. We see the worst leaks in attics and crawlspaces where temperature swings are extreme and where Canyon Lake’s humid subtropical climate turns minor gaps into condensation points. A typical whole-house duct sealing job in Canyon Lake runs $1,200 – $2,800, depending on system size, accessibility, and whether we need to repair or replace damaged flex runs before sealing.
What We Seal and Why It Fails Here
We seal collar connections, air handler boots, plenum seams, and register boots. In Canyon Lake, the failures we find most often trace back to two things: the fine white limestone dust that infiltrates when lake levels drop below 890 feet, and the humidity spikes that follow flash-flood cycles. Dust works into tape adhesives and degrades them. Humidity swells mastic and causes it to separate. We use professional-grade sealing compounds rated for high-humidity environments, not hardware-store tape that’ll peel inside a season.
How We Verify the Seal
After sealing, we run a blower-door or duct-blaster test to measure leakage reduction. We show you the before and after numbers. In older Canyon Lake homes with original 1980s flex duct, we often see leakage drop from 25 – 35% of total airflow down to under 10%. That’s air you’re already paying to condition that was dumping into your attic or crawlspace.
Duct Sealing Services in Canyon Lake
Duct Sealing Services in Canyon Lake cover everything from spot repairs on disconnected runs to full-system sealing with access panel installation for future maintenance. We don’t price per vent or per linear foot. We price per system, agree on it in writing before we touch anything, and that’s the number on the invoice. For a partial seal on a single zone or a small lake cabin, expect $600 – $1,100. For larger custom homes with complex zoning or buried duct runs, $2,200 – $3,500 is realistic.
Outbuilding and Detached Systems
We seal ductwork in guest houses, workshops, and pool equipment sheds. Long driveways and unpaved access roads around Canyon Lake don’t change our arrival window; we factor the drive into scheduling. If your outbuilding has a separate heat pump or ducted mini-split, we’ll seal it as a standalone system with its own written price.
Pre-Sealing Cleaning and Mold Treatment
We won’t seal over mold. If our camera inspection finds microbial growth inside your ducts, we’ll recommend source-removal cleaning first, using negative-air machines and HEPA filtration. Sealing a dirty system traps the problem. We clean it, dry it, then seal it. That’s the order, every time.
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.
Trusted Brands We Service in Canyon Lake
Our sealing work is backed by equipment from Rotobrush, Nikro, and Abatement Technologies. Rotobrush rotary brush systems handle pre-sealing cleaning in older flex duct without damaging it. Nikro negative-air machines maintain proper containment pressure so dust and debris don’t re-enter your living space during the job. For filtration upgrades after sealing, we stock Honeywell, Aprilaire, and Guardsman products with fast turnaround from our Inland Empire warehouse. We don’t guess at what fits your system. We measure, spec, and install.
Common Duct Sealing Problems We See in Canyon Lake Homes
- Crushed or disconnected flex duct in lake cabins and double-wides. The original 1970s – 1990s flex runs in crawlspaces get stepped on during maintenance, chewed by rodents, or simply sag and separate at the air handler. Sealing tape won’t hold on a duct that’s structurally failed. We replace the damaged run, then seal the connections properly.
- Condensation and mold from humidity spikes. Canyon Lake’s flash-flood cycles and constant summer HVAC operation push moisture into poorly sealed ducts. Cool supply air hits humid attic air at a leak point, and you’ve got a mold colony inside six weeks. Sealing stops the condensation; cleaning removes what’s already growing.
- Limestone dust bypassing worn seals. When the reservoir drops and that fine white dust gets airborne, it loads the return side heavily. Old tape seals crumble under the particulate load. We remove the degraded material, clean the mating surfaces, and apply mastic rated for dusty environments.
- Multiple returns with unbalanced pressure. Newer custom homes around Canyon Lake often have complex return systems that were never properly sealed at the rough-in. We map the airflow, identify the leaks, and seal each return trunk and branch so the system breathes evenly.
Pricing for Duct Sealing in Canyon Lake, CA
Here’s what duct sealing actually costs in Canyon Lake. A small system, single zone, accessible attic or crawlspace: $600 – $1,100. Average whole-house system with standard access: $1,200 – $2,200. Large custom home, multiple zones, buried duct runs, or significant flex replacement before sealing: $2,500 – $3,800. What moves you up or down: how many runs need replacement versus repair, whether we need to install access panels, and if mold remediation or full-system cleaning precedes the seal.
We don’t do coupons. We don’t do per-vent pricing that balloons at the door. We inspect, we write the price, you approve it, we do the work. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Canyon Lake
Our crews travel throughout Southern California from the Inland Empire office. We also provide Duct Sealing to homeowners in Los Angeles, San Diego, San Jose, and San Francisco. If you’re outside Canyon Lake city limits but in the region, we’ll quote the drive time honestly and give you the same written price guarantee. Every Duct Sealing in Canyon Lake job gets the same equipment, the same technicians, and the same 365-Day Done Right Promise.
Serving Canyon Lake, CA - Our Local Coverage Area
We’re based in the Canyon Lake 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 Canyon Lake
Every 5 – 7 years for most Canyon Lake homes, but every 3 – 4 years if you’re lakefront and dealing with the limestone dust cycle. When the reservoir drops below 890 feet, that dust loads your returns and degrades seals faster than in inland neighborhoods. Call (361) 326-5060 and we’ll inspect to tell you where you stand.
Yes, but only if your ducts are clean first. Sealing stops new dust from entering through leaks, but it won’t remove what’s already inside. We clean with negative-air HEPA filtration, then seal. Homeowners in Canyon Lake Shores and North Shore see the biggest difference during low-water summers.
Humidity is entering through duct leaks and condensing on cool surfaces, which grows mold inside 48 – 72 hours in Canyon Lake’s climate. Sealing the leaks stops the moisture intrusion. If you smell it now, we need to inspect for active growth before sealing. Call us at (361) 326-5060.
Yes. We schedule for the drive time and send the right vehicle for unpaved or steep access. Outbuilding heat pumps and ducted mini-splits are priced as standalone systems with the same written guarantee. No surcharges for distance within our service area.
Often yes, but we’re honest when it’s not. If your flex duct is crushed, rodent-damaged, or original 1970s material, replacement makes more sense than sealing. We’ll show you the camera footage and give you both options in writing. The 365-Day Done Right Promise applies either way.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Canyon Lake since 2004.