Duct Sealing in Pleasanton - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Pleasanton

Duct sealing in Pleasanton typically runs $800 – $2,400 for a whole-house seal depending on access, duct material, and how many runs need attention. Most Pleasanton homes we work on take one day, with the price written down before we start. Call (361) 326-5060 for a free estimate.

Call (361) 326-5060

We’ve been sealing ducts in Pleasanton long enough to know what the Tri-Valley does to a house. Those 40°F summer mornings that flip to 95°F by afternoon force your HVAC to cycle between heat and AC daily for months. That cycling stresses every joint, boot, and plenum connection. Meanwhile, the spring olive and oak pollen, plus late-summer wildfire smoke, loads your ductwork with fine debris that coastal Bay Area cities simply don’t see. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, but our crews serve Pleasanton locally and know the difference between a 1962 ranch near downtown and a 1990s tract in Hacienda.

Why Hollis Air Duct Cleaning Is Pleasanton’s Preferred Duct Sealing Company

Hollis Air Duct Cleaning has been part of the Garrison Partners family since 2004. We operate under The Garrison Standard: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. Our Duct Sealing team doesn’t negotiate at the door or add line items after the van is parked.

Pleasanton homeowners call us because we’ve seen their specific problems before. The original 1960s furnace closet in a hallway with a short, undersized return. The sagging flex duct in Ruby Hill attics baked to crumbling by August heat. The gray film on return grilles that coastal-city techs misdiagnose as normal dust. We know what causes it and we fix it with mastic, mesh tape, and camera verification.

Every job gets our 365-Day Done Right Promise in writing. If the seal fails within a year, we come back at no charge, including a free second visit. Our technicians are background-checked and uniformed. Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.

Duct Insulation in Pleasanton

Duct Insulation in Pleasanton addresses a problem most homeowners don’t know they have: hot attic air bleeding through thin or degraded duct walls, and cooled air warming up before it ever reaches the register. In Pleasanton’s climate, with attic temperatures regularly hitting 130°F in July and August, uninsulated or poorly insulated ductwork can lose 20 – 30% of its thermal energy. We typically see this in Hacienda and Ruby Hill homes with 1980s – 2000s flex duct runs that were installed with minimal wrap, or where the original fiberglass blanket has compressed, torn, or been disturbed by rodents. A typical duct insulation job in Pleasanton runs $600 – $1,800 depending on linear footage and whether we’re adding new wrap or replacing degraded material.

Attic Heat Gain and What It Costs You

Pleasanton’s inland location means your attic is a furnace six months a year. When your flex duct runs through that space with thin or missing insulation, the 55°F air your AC just produced is 65°F by the time it hits your bedroom register. Your system runs longer. Your bill climbs. We measure supply temperatures at the air handler and at the register to show you the difference before we quote anything.

Insulation Replacement vs. Supplement

Some Pleasanton homes have intact but compressed insulation that we can supplement with new fiberglass wrap or reflective bubble barrier. Others, especially in older downtown properties with original metal duct, need full replacement with R-6 or R-8 flex duct and fresh insulation. We photograph the condition before we start and show you what we found. The price is fixed to the scope, not an hourly rate that balloons.

HVAC Duct Sealing in Pleasanton

HVAC Duct Sealing in Pleasanton is the repair that stops your conditioned air from leaking into your attic, crawl space, or walls before it ever reaches your rooms. We use mastic sealant and fiberglass mesh tape on metal duct joints, and specialized foil tape or mastic on flex duct connections. For a typical Pleasanton home, whole-house HVAC duct sealing runs $800 – $2,400. Smaller partial seals, such as a single disconnected run or a leaking plenum, can run $300 – $700. The work usually takes 4 – 8 hours, and we verify with a visual camera inspection and airflow check at each register.

Metal Duct in Older Pleasanton Homes

The galvanized steel duct in downtown and Pleasanton Heights homes from the 1950s – 1970s corrodes and separates at joints over decades. We open the plenum, clean the joints, and seal with mastic rated for 200°F. On corroded sections too far gone to seal, we replace with new flex or sheet metal and seal the transitions. Camera inspection afterward proves the fix.

Flex Duct in Subdivision Homes

Hacienda and Ruby Hill homes with 1980s – 2000s flex duct often have sagging runs that kink at low points, crushing airflow and creating tears where the duct pulls away from the boot. We support with proper straps, replace damaged sections, and seal every connection with mastic. The hot Pleasanton attic bakes the inner liner until it flakes; we check for that degradation and replace before it clogs your system.

Trusted Brands We Service in Pleasanton

We carry professional-grade equipment and materials from Rotobrush, Nikro, Abatement Technologies, and Guardsman. Our rotary brush systems and negative-air machines are the same tools commercial crews use, not hardware-store rentals. For filtration and sealing products, we stock Honeywell, Aprilaire, and Guardsman components so Pleasanton customers don’t wait for parts to ship. When we seal a duct system, we use mastic and tape rated for the temperature swings your attic sees. That matters in Pleasanton, where a January morning can be 38°F and a July afternoon 102°F. Fast turnaround because we keep inventory local. No “we’ll come back next week when the part arrives.”

Common Duct Sealing Problems We See in Pleasanton Homes

• Original galvanized duct corroding at joints. Downtown Pleasanton and Pleasanton Heights homes built in the 1960s and 1970s have metal duct that has separated at seams after 50+ years of thermal cycling. Attic dust and insulation fibers pull straight into the return through those gaps. The gray film on your return grille is the tell.
• Short, undersized returns pulling attic debris. That original hallway furnace closet was built for a smaller system. The return is too short and too small, creating negative pressure that sucks attic air through every gap in the building envelope. Sealing the ductwork helps, but we also flag when the return itself needs modification.
• Flex duct sagging and kinking in hot attics. Hacienda and Ruby Hill subdivisions have long flex duct runs that weren’t properly supported. Gravity and attic heat combine to create low points where dust collects and airflow dies. The inner liner breaks down faster in Pleasanton’s 130°F attics than in cooler coastal climates.
• Failed seals at plenums and air handler cabinets. Those extreme diurnal temperature swings, 40°F to 95°F in a single summer day, expand and contract metal and flex connections until the seals crack. We see this most in homes where the air handler is attic-mounted and exposed to daily baking and cooling.

Pricing for Duct Sealing in Pleasanton, CA

We Also Serve Cities Near Pleasanton

Our crews work throughout the Tri-Valley and southern East Bay. We regularly seal ducts in Pleasanton and nearby Hayward, Dublin, Livermore, and San Ramon. Same standards, same written pricing, same 365-Day Done Right Promise at every stop.

FAQs About Duct Sealing in Pleasanton