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 Westlake Village
We dispatch to Westlake Village from our Los Angeles scheduling office, and crews are usually routing through the 101 corridor within a day of your call. If you’re losing conditioned air through gaps in your attic ductwork, or your upstairs rooms never reach the temperature your thermostat promises, duct sealing is likely the fix. Call us at (361) 326-5060 for a free estimate, and we’ll give you a written price before any work starts.
Westlake Village sits right on the Ventura-Los Angeles county line, and that split identity shows up in the homes we service. Nearly every house here was built between the late 1960s and mid-1990s, often with tightly sealed attic duct systems designed for a different era of energy costs. Many of those original flex-duct runs have degraded after decades in hot attics. The HOAs here are active and detail-oriented, which we respect, because it means we coordinate approvals for roof or crawlspace access before we ever park the van. Our Duct Sealing team knows the local architectural review processes and builds that lead time into every schedule.
Why Hollis Air Duct Cleaning Is Westlake Village’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and that longevity matters in a market where fly-by-night operators rotate through every few seasons. Our technicians are background-checked, uniformed, and expected to arrive inside the quoted window, price the job in writing, and leave the site clean. That’s The Garrison Standard, and it’s how we work in every Westlake Village home we enter.
Our phones are answered by a live person 24 hours a day, seven days a week. No voicemail loops, no callback queues, no waiting until Monday morning to get on the schedule. When you’re dealing with an HVAC system that’s bleeding money through leaky ducts, that responsiveness matters.
The 365-Day Done Right Promise covers every duct sealing job we complete in Westlake Village. If the seal fails or the airflow problem returns within a full year, we come back and make it right at no charge, including a free second visit. That guarantee is backed in writing on every invoice, not offered verbally and forgotten later.
HVAC Duct Sealing in Westlake Village
HVAC Duct Sealing in Westlake Village typically addresses the gaps, disconnected joints, and deteriorated mastic that develop in attic duct systems after 20 to 30 years of thermal cycling. Most homeowners notice the problem through uneven temperatures between floors, dust blowing from registers, or utility bills that climb without explanation. In this market, a whole-home duct sealing job generally runs $1,200 to $2,800 depending on system accessibility, the linear footage of ductwork, and whether we’re working with original flex duct or galvanized sheet metal.
The hot-summer Mediterranean climate here accelerates wear. Attic temperatures in Westlake Village regularly exceed 140°F during July and August, and that thermal stress hardens rubberized duct seals and cracks mastic compounds. Santa Ana wind events add pressure differentials that force unfiltered air through any opening. We see the results every September: homeowners calling because their second-floor bedrooms won’t cool below 78°F despite the compressor running nonstop.
How We Seal Attic Duct Systems
We start with a pressure test to map leakage points, then apply duct sealing mastic, a thick, fiber-reinforced compound that remains flexible after curing, to every joint and seam. For larger gaps or disconnected runs, we install mechanical collars and re-strap sagging flex duct. Our crews use Nikro negative-air machines to maintain containment during the process, so no debris drops into your living space.
When Sealing Beats Replacement
Not every leaky system needs new ductwork. If your galvanized sheet-metal trunk lines are intact and the damage is limited to flex-duct branches and connection points, targeted sealing restores efficiency at roughly one-third the cost of full replacement. Roy Castellanos trains our estimators to recommend the conservative fix first, and we’ll show you the pressure-test numbers so you understand why.
Duct Repair in Westlake Village
Duct Repair in Westlake Village often follows the same inspection that identifies sealing needs, because degraded flex duct and corroded sheet metal frequently appear together. We replace crushed or torn flexible duct runs, repair damaged trunk lines, and rebuild plenum connections that have separated from the air handler. A typical repair project in this area, combining sealing and localized replacement, runs $800 to $2,400.
The 1980s and 1990s condominiums near Westlake Boulevard and the original ranch-style homes south of Agoura Road present distinct challenges. Condos often have vertical duct chases running through shared walls, where access is tight and coordination with neighboring units may be necessary. Older ranches sometimes retain original galvanized ducting that has corroded at the seams, requiring sectional replacement rather than simple sealing.
Condos and Shared-Wall Systems
Multi-unit buildings around the lake and along Lindero Canyon Road need careful containment. We use Nikro negative-air equipment and Aprilaire filtration to prevent cross-contamination between units. Our technicians document every step for HOA records, and we schedule around building maintenance windows when required.
Fire-Season Damage Assessment
After major wildfire events, fine ash infiltrates attic ducts through soffit and ridge vents, and the heat can deform flex duct near roof penetrations. We inspect for both contamination and structural damage, then recommend cleaning, sealing, or replacement based on what we find. We also handle Air Duct Cleaning in Westlake Village and Dryer Vent Cleaning in Westlake Village if multiple services are needed after a fire season.
Trusted Brands We Service in Westlake Village
Our equipment roster includes Rotobrush rotary brush systems for mechanical cleaning, Nikro negative-air machines for containment, and filtration products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman. We stock common duct sealing consumables, mastic compounds, and mechanical fasteners locally, so most Westlake Village jobs don’t wait on parts orders. When a specific fitting or collar size is needed for an older system, our Los Angeles office coordinates same-day or next-morning pickup. That inventory discipline means we complete jobs in one visit more often than not, which matters when HOA scheduling windows are tight.
Common Duct Sealing Problems We See in Westlake Village Homes
- Original flex duct crumbling in hot attics. The 1970s and 1980s tract homes near North Ranch and Three Springs have flex duct that has exceeded its design life. The inner liner disintegrates when disturbed, and the insulation layer compresses, so sealing alone isn’t enough, we replace the damaged sections before sealing the new connections.
- Disconnected collars at the air handler plenum. In homes where the HVAC unit sits in a garage or closet, vibration gradually loosens the sheet-metal collar connecting the plenum to the trunk line. We find this constantly in the 1990s builds near Westlake Lake, and it’s often the primary source of lost airflow.
- Wildfire ash compromising mastic seals. Fine particulate from Santa Ana wind events works into tiny gaps in older mastic, creating a gritty layer that prevents proper adhesion when we reseal. We clean every seam with compressed air and solvent before applying new compound.
- HOA access restrictions delaying repairs. Many Westlake Village associations require 48- to 72-hour notice for roof or exterior wall penetration. We build this into our scheduling and provide the documentation your property manager needs, because we’ve learned that skipping this step costs everyone time.
Pricing for Duct Sealing in Westlake Village, CA
A typical whole-home duct sealing in Westlake Village runs $1,200 to $2,800. Partial sealing of a single zone or limited attic access starts around $800. Duct repair combining sealing with localized flex-duct replacement generally falls between $800 and $2,400. These ranges reflect our actual invoices in this market, not teaser rates that balloon once we’re inside your home.
What moves the price: the linear footage of ductwork, whether we’re working in a walkable attic or a tight crawlspace, the condition of existing mastic and fasteners, and whether HOA coordination adds scheduling complexity. We don’t charge per vent or per linear foot, we quote one flat price per system, agreed in writing before any work begins. That price does not change at the door.
Estimates are free. Call (361) 326-5060 and we’ll schedule a pressure test and written quote at no charge.
We Also Serve Cities Near Westlake Village
Our crews regularly route to Westlake Village from the 101 corridor, and we cover Thousand Oaks, Agoura Hills, Oak Park, and Calabasas on the same scheduling system. The housing stock and climate conditions are similar across these communities, so the expertise we apply in Westlake Village transfers directly. Dispatch and scheduling are coordinated from our Los Angeles office.
Serving Westlake Village, CA - Our Local Coverage Area
We’re based in the Westlake Village 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 Westlake Village
We typically schedule duct sealing inspections within one to two business days for Westlake Village addresses. HOA properties may need 48 to 72 hours additional lead time for architectural review approval. Call (361) 326-5060 to check current availability, estimates are free.
Yes, we service the full Westlake Village area including North Ranch, Three Springs, and the original lake-area properties. Each neighborhood has distinct access considerations, and our estimators account for HOA requirements and attic configurations specific to your development.
We don’t classify duct sealing as an emergency service, because it’s a scheduled repair that requires inspection and written pricing. However, our phones are answered by a live person 24/7, and we prioritize scheduling for homeowners with complete system failures or post-wildfire damage assessments.
Pricing is consistent across our service area, but Westlake Village jobs sometimes run toward the higher end of our ranges due to HOA coordination requirements and the prevalence of complex attic systems in older planned communities. A typical whole-home seal in Westlake Village is $1,200 to $2,800, comparable to Thousand Oaks and Calabasas.
Every duct sealing job is covered by our 365-Day Done Right Promise in writing. If the seal fails or the original airflow problem returns within one full year, Hollis returns and makes it right at no charge, including a free second visit. That guarantee applies to all Westlake Village work.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Westlake Village since 2004.