Duct Sealing in East Palo Alto - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across East Palo Alto

Duct sealing in East Palo Alto typically runs $800 – $2,400 for a whole-home system, with most ranch-style homes falling in the $1,200 – $1,800 range depending on attic accessibility and how many joints need mastic. We dispatch crews from our San Francisco Bay Area office and serve East Palo Alto directly, so you’re not waiting on a van coming up from San Jose or across the bridge. Call (361) 326-5060 for a free estimate with a written price before any work starts.

Call (361) 326-5060

We know these streets. Weeks Street, Bay Road, the neighborhoods off University Avenue – we’ve sealed ducts in the attics of East Palo Alto’s 1940s – 1960s ranch homes where the original fiberglass trunk lines have been pulling wildfire smoke straight from the Santa Cruz Mountains for decades. That local knowledge matters because sealing ducts here isn’t the same job as sealing ducts in a new build in San Jose. The housing stock is older, the fire season is real, and the fix has to address both.

Why Hollis Air Duct Cleaning Is East Palo Alto’s Preferred Duct Sealing Company

Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. Our Duct Sealing in East Palo Alto work follows The Garrison Standard: arrive inside the quoted window, price in writing before touching equipment, complete the job by the book, and leave the site clean. Every technician is background-checked and uniformed, and our phones are answered by a live person 24 hours a day, 7 days a week.

East Palo Alto homeowners call us back because we show them the problem before we quote the fix. Our techs carry camera systems that feed video from inside the attic trunk lines to a tablet you can watch in real time. When we find unsealed joints pulling smoke from last season’s fires, you see it. The price we write down covers the full seal – mastic, mesh reinforcement, and pressure testing – not a per-joint add-on that balloons once we’re in the attic.

Our 365-Day Done Right Promise applies to every duct sealing job in East Palo Alto. If the seal fails, if smoke smell returns, if your static pressure drops out of spec within a year, we come back and make it right at no charge. That includes a free second visit. No negotiation, no runaround. It’s in writing on every invoice.

Duct Insulation in East Palo Alto

Duct Insulation in East Palo Alto addresses a specific problem in the city’s older ranch housing stock: attic ducts that lose conditioned air through thin or deteriorated fiberglass wrapping, forcing your HVAC to run longer and pull more unfiltered outside air through every leak point. In a climate with dry 80-degree summers and increasing wildfire smoke events, poorly insulated ducts don’t just waste money – they stay warm enough to let smoke particles off-gas back into your system long after the fires have died down. A typical Duct Insulation job in East Palo Alto runs $1,100 – $2,800 depending on linear feet of duct and whether we’re working around existing blown-in insulation.

When Insulation Beats Sealing Alone

Some East Palo Alto homes need both, but insulation takes priority when the fiberglass wrap on your supply lines has compressed to half its original thickness or when rodents have tunneled through attic insulation and exposed the metal core. We use Guardsman-rated insulation products with proper vapor barriers, not the hardware-store wrap that slips after one season. The work takes a full day in most 1,200-square-foot ranch homes, and we test temperature drop across the system before and after.

Fire Season and Thermal Retention

Here’s the local angle most crews miss: during wildfire events, hot attic air saturated with smoke particles presses against your ducts for days. Proper insulation slows that heat transfer, which means your system cycles less frequently and pulls less contaminated air through any remaining micro-leaks. In East Palo Alto’s climate, that’s a real air-quality benefit, not just an efficiency play.

HVAC Duct Sealing in East Palo Alto

HVAC Duct Sealing in East Palo Alto means closing the leaks in your forced-air system’s metal or fiberglass ductwork using mastic sealant and reinforced mesh, then verifying the result with a static pressure test. Most jobs target the attic trunk line, the plenum connections at the air handler, and the register boots where ducts meet your ceiling or floor vents. In East Palo Alto’s 1940s – 1960s ranch homes, we regularly find return-side trunks that were never fully sealed at installation – gaps of a quarter-inch or more that pull attic air straight into your living space. A typical HVAC Duct Sealing job here runs $800 – $2,400, with most homes in the $1,200 – $1,800 range.

The Camera-First Approach

We don’t quote sealing blind. Our techs run a video scope through the full length of your attic ductwork before writing a price. In East Palo Alto, this step catches hidden problems: joints buried under decades of blown-in insulation, corroded plenum seams, or previous DIY repairs with failing foil tape. The camera footage goes on the invoice. You know what we saw, where we saw it, and what it costs to fix.

Smoke-Specific Sealing Protocol

Standard sealing stops conditioned air loss. Our Duct Sealing protocol for East Palo Alto adds a smoke-focused step: after mastic application, we pressurize the system and test with a non-toxic smoke pencil at every joint. If we see wisps pulling in from the attic, the seal isn’t done. This matters because wildfire smoke particles are smaller than the dust and pollen most standard tests target. A seal that passes a basic pressure test can still fail against smoke.

Trusted Brands We Service in East Palo Alto

Our vans carry professional-grade equipment from Rotobrush, Nikro, and Guardsman – the same tools commercial HVAC crews use, not hardware-store alternatives that fail mid-job. For East Palo Alto homes with older ductwork, we stock mastic compounds rated for the temperature swings these attics see, plus reinforced mesh tape that outlasts standard foil products by years. We also offer East Palo Alto Dryer Vent Cleaning using the same professional-grade equipment. We source filtration upgrades through Honeywell and Aprilaire when a sealing job reveals the system needs better particle capture to handle smoke season. Parts are on the van, so most East Palo Alto jobs finish in one visit without waiting on a supply run to San Jose.

Common Duct Sealing Problems We See in East Palo Alto Homes

• Unsealed attic return trunks in ranch homes. The 1940s – 1960s housing stock around Weeks Street and the Bay Road corridor was built with return-side ductwork that was never properly sealed at the joints. During wildfire season, these open gaps pull smoke-laden attic air directly into your HVAC system and distribute it through every vent.
• Foil tape failures at the air handler. Previous owners or handymen often used standard foil tape on the plenum connections. East Palo Alto’s hot, dry summers bake that adhesive brittle within a season. We remove it entirely and apply mastic with mesh reinforcement, which flexes with temperature cycles.
• Hidden leaks behind attic insulation. Blown-in insulation in these older homes covers duct joints that have been open for decades. Without a camera inspection, a sealing crew can miss half the problem. We pull back insulation methodically, seal what we find, and replace the insulation properly.
• Sealed ducts with inadequate filtration. Even a perfect seal won’t stop smoke particles if your filter is a basic fiberglass panel. We check MERV rating and upgrade to proper filtration where the system can handle the static pressure load. Otherwise you’re sealing the envelope but leaving the window open.

Pricing for Duct Sealing in East Palo Alto, CA

We Also Serve Cities Near East Palo Alto

Our Bay Area crews also handle East Palo Alto neighbors in Los Angeles, San Diego, San Jose, and San Francisco. Each location runs independently under The Garrison Standard, with local dispatch and the same written pricing, background-checked technicians, and 365-Day Done Right Promise.

FAQs About Duct Sealing in East Palo Alto