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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After
Before
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Before
AfterFast, Reliable Duct Sealing Across South Lake Tahoe
Duct sealing in South Lake Tahoe typically runs $800 – $2,400 per system depending on accessibility, with most multi-system homes falling in the $1,500 – $4,500 range for complete sealing across all air handlers. We scope each system separately, price it in writing before we start, and back it with our 365-Day Done Right Promise. Call (361) 326-5060 for a free estimate.
We’ve worked on enough homes around South Lake Tahoe to know the pattern: a chalet off Pioneer Trail with three separate air handlers, a Tahoe Keys property with zoned heating for the main house and the guest wing, an A-frame near Stateline where the crawlspace supply lines were never sealed at the trunk. At 6,237 feet, with winter heating loads that down-the-hill cities don’t face, every cubic foot of conditioned air that leaks into an unconditioned attic or crawlspace costs real money. Our crews dispatch from the Sacramento office and serve South Lake Tahoe locally, carrying the mastic, foil tape, and aerosol sealant rated for the temperature swings these mountain homes see.
Why Hollis Air Duct Cleaning Is South Lake Tahoe’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and that track record matters in a market where vacation-rental turnover means crews come and go. South Lake Tahoe homeowners and property managers call us back because we show up inside the window, in uniform, with a written price that doesn’t move once we’re inside.
Our technicians are background-checked and held to The Garrison Code: arrive squared away, price before touching anything, finish by the book, leave the site clean. No voicemail loops, either. Phones are answered by a live person 24 hours a day, 7 days a week.
The 365-Day Done Right Promise covers every duct sealing job in writing. If a seal fails, a joint opens, or a reconnected run separates within a year, we come back at no charge. That includes a free second visit, not a negotiation.
We know the local housing stock: the 1960s flex duct in original A-frames, the unsealed sheet metal plenums in chalets off Highway 50, the multi-system luxury homes around the Tahoe Keys where three air handlers mean three separate scopes of work. That local knowledge keeps us from treating a three-system house like a one-system job.
Duct Sealing Services in South Lake Tahoe
Duct Sealing Services in South Lake Tahoe address the conditioned air that escapes through gaps, disconnected runs, and failed sealant in your HVAC distribution system. A typical single-system sealing job in this market runs $800 – $1,800; multi-system homes with two or three air handlers range $1,500 – $4,500 depending on duct accessibility and the condition of existing mastic. Most South Lake Tahoe homeowners need sealing when rooms won’t hold temperature, energy bills spike during winter heating season, or a camera inspection reveals disconnected flex duct or cracked plenum joints.
Multi-System Assessment and Scope
Many South Lake Tahoe homes, especially A-frames and chalets built between the 1960s and 1990s, were constructed with zoned or separate HVAC systems. A property near the Tahoe Keys might have one air handler for the main house, another for the guest wing, and a third for a detached studio. Our Duct Sealing team scopes each system independently, tests airflow at each register, and documents which trunk lines, branch ducts, and plenum connections belong to which unit. Sealing only the primary system while leaving auxiliary handlers leaking is a common miss we see from crews who don’t take the time to map the full distribution network.
Aerosol Duct Sealing for Hard-to-Reach Runs
For ductwork buried in unconditioned attics or crawlspaces where manual sealing isn’t practical, we use aerosol sealant injection. The duct system is pressurized and a fine sealant mist seeks out leaks from the inside, bonding to edges up to 5/8 inch wide. This method works well for the long, inaccessible trunk lines common in South Lake Tahoe’s steep-roof chalets where crawling the full run isn’t feasible. We follow with a post-seal pressure test to verify results.
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.
Duct Insulation in South Lake Tahoe
Duct Insulation in South Lake Tahoe protects against the heat loss and condensation that occur when conditioned air travels through unconditioned spaces at altitude. At 6,237 feet, with winter temperatures regularly dropping below 20°F and summer wildfire smoke pushing HVAC systems hard, properly insulated ductwork reduces energy waste and prevents the moisture buildup that leads to mold and degraded mastic. A typical insulation job for exposed supply runs in a South Lake Tahoe crawlspace or attic runs $600 – $1,400 per system, with multi-system homes ranging $1,200 – $3,200 depending on linear footage and current R-value.
Rodent-Damaged Insulation Replacement
South Lake Tahoe’s cold winters and forested lots make crawlspaces and attics attractive to rodents, and we’ve pulled enough nests out of duct insulation near Pioneer Trail and the Tahoe Keys to know the pattern. Chewed insulation doesn’t just lose R-value; it exposes the duct to temperature extremes and creates entry points for ash and particulates during smoke season. We remove contaminated material, seal the underlying ductwork, and install new insulation with proper vapor barriers rated for mountain climate conditions.
Condensation Control in High-Humidity Zones
Homes near the lake or with crawlspaces that see groundwater movement often develop condensation on cool supply ducts in summer. That moisture degrades mastic, rusts sheet metal fittings, and saturates fiberglass insulation. We address this by improving the duct seal first, then upgrading to insulation with higher vapor resistance and proper jacketing. In some cases we recommend adding mechanical ventilation to the crawlspace itself, which solves the root cause rather than treating symptoms repeatedly.
Trusted Brands We Service in South Lake Tahoe
We carry professional-grade equipment and materials from Rotobrush, Nikro, Aprilaire, and Abatement Technologies, the same tools commercial crews use, not hardware-store substitutes. For filtration and sealing products, we stock Guardsman-rated mastics and vapor barriers sized for the temperature swings South Lake Tahoe ducts experience. That local inventory means faster turnaround on jobs around Stateline, the Tahoe Keys, and Pioneer Trail. We don’t have to order materials from down the hill and wait for delivery through chain-control checkpoints.
Common Duct Sealing Problems We See in South Lake Tahoe Homes
- Disconnected flex duct in multi-system chalets. The original flex runs in 1970s and 1980s A-frames were often supported with inadequate strapping, and decades of vibration plus rodent traffic have pulled connections apart at the boots. We find these with camera inspection, then reconnect and seal with mechanical fasteners and mastic rated for the application.
- Failed mastic in unconditioned attics and crawlspaces. Standard mastic applied in the 1990s has often cracked after thousands of freeze-thaw cycles at 6,237 feet. Temperature swings in South Lake Tahoe’s unconditioned spaces are severe, and condensation behind the sealant accelerates degradation. We remove old material and apply fresh, flexible sealant formulated for mountain climate exposure.
- Plenum cabinet leaks pulling attic air. The air handler cabinet and supply plenum are often the leakiest part of the system, especially after wildfire smoke seasons when loaded MERV-13 filters increase static pressure and force air through every seam. We seal cabinet joints, filter racks, and blower access panels with foil tape and mastic to maintain proper return path.
- Rodent-nested insulation and compromised vapor barriers. Mice and squirrels tear insulation for nesting material, exposing ducts and creating paths for outdoor air infiltration. This is particularly common in crawlspace systems near forested lots around Pioneer Trail and the Tahoe Keys. We remove contamination, seal the duct, and reinstall protected insulation.
Pricing for Duct Sealing in South Lake Tahoe, CA
Honest pricing means ranges you can use before you call. In South Lake Tahoe’s market, a single-system duct sealing job with accessible ductwork typically runs $800 – $1,800. Multi-system homes with two or three air handlers, common in A-frames, chalets, and Tahoe Keys luxury properties, range $1,500 – $4,500. Duct insulation adds $600 – $1,400 per system depending on linear footage and current condition.
What moves the number: accessibility (crawlspace vs. finished basement), number of systems, extent of existing damage, and whether we need to replace rodent-compromised insulation before sealing. We do not price per vent. We price per system, agreed in writing before any work starts, and that price does not change at the door. You’ll get a written scope for each air handler, a pressure test result before and after, and photo documentation of sealed joints. Call (361) 326-5060 for a free estimate.
We Also Serve Cities Near South Lake Tahoe
Our crews travel the Highway 50 corridor to handle duct sealing and insulation work in South Lake Tahoe and surrounding communities including Pollock Pines, Georgetown, Placerville, and Diamond Springs. Each job carries the same written price guarantee and 365-Day Done Right Promise, whether it’s a single-system cabin or a multi-zone property.
Serving South Lake Tahoe, CA - Our Local Coverage Area
We’re based in the South Lake Tahoe 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 South Lake Tahoe
We charge per system, not per house. A three-system chalet near the Tahoe Keys or Stateline gets three separate scopes of work, three separate pressure tests, and three line items on the written price. That prevents the common problem of sealing only the main air handler while auxiliary systems continue leaking into unconditioned space. Call (361) 326-5060 and we’ll scope each system during the free estimate.
We prioritize source removal and documentation. After a smoke event, we camera-inspect for ash infiltration, seal disconnected runs that pulled contaminated air, and pressure-test to verify the system draws only from conditioned space. We provide written documentation of the scope, before-and-after photos, and pressure test results that property managers can show guests or insurers. A second-home owner near Stateline called after the Caldor Fire, complaining of ash odor and cold rooms in a three-system chalet. We ran a camera inspection from the air handler and found a disconnected flex run to a back bedroom plus failed mastic at the plenum; using Rotobrush agitation tools under negative pressure with HEPA filtration, we sealed the trunk and branch joints and reconnected the run. The smoke odor dropped and the open return stopped pulling attic air, so the homeowner could document source removal for their rental guests.
A written scope of work for each system, dated before-and-after photos of sealed joints, pre- and post-seal pressure test results in CFM25, and an invoice that itemizes the work by air handler. Vacation-rental managers in South Lake Tahoe, many working with platforms like Vacasa or independent Airbnb listings, use this documentation for guest reassurance and “mountain fresh” marketing. We also note any filter upgrades or MERV ratings that complement the sealing work.
Original construction used unsealed sheet metal plenums and early flex duct with minimal fastening standards, and these materials have degraded through decades of freeze-thaw cycles at altitude. Many were built with multiple small systems rather than central zoned HVAC, multiplying the number of connection points that can fail. The steep roofs that define South Lake Tahoe’s architectural character also mean ducts run through difficult-to-access attics and crawlspaces where problems go unnoticed until rooms won’t heat or energy bills spike.
Yes, but only if the duct system is tight. A leaky return pulls unfiltered attic or crawlspace air around the filter, and a leaky supply pressurizes wall cavities where ash can settle. Sealing the duct system, especially the air handler cabinet and plenum, ensures that all air moving through the system actually passes through the MERV-13 filter. In South Lake Tahoe’s smoke seasons, that matters. Call (361) 326-5060 and we’ll pressure-test your system to find the leaks that bypass your filtration.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving South Lake Tahoe since 2004.