Duct Sealing in Martinez - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Martinez

Duct sealing in Martinez typically runs $800 – $2,400 for a whole-home system, depending on whether we’re working with standard flex duct or the original gravity-furnace runs common in older neighborhoods. We’re the Duct Sealing in Martinez crew homeowners call when the job starts with asbestos-aware assessment, not a quick spray-and-go. Dispatch and scheduling are coordinated from our San Francisco Bay Area office, and our technicians serve Martinez locally, carrying the tools and materials needed for both modern HVAC and century-old ductwork. If your vents blow weak, your rooms heat unevenly, or your energy bills climbed without explanation, call us at (361) 326-5060. We’ll give you a written price before any work starts, and every repair is covered by our 365-Day Done Right Promise.

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

We’ve been in business since 2004 as part of the Garrison Partners family, and our reputation in Martinez is built on showing up inside the window, pricing in writing, and leaving the site clean. Homeowners here also know us for Martinez Dryer Vent Cleaning. Homeowners here know us for handling the tricky jobs: the 1920s Craftsman on Escobar Street with asbestos-wrapped supply pipes, the post-war ranch in the hills with crushed returns behind a kitchen remodel, the downtown Victorian where ducts were rerouted through wall chases in 1987 and partially flattened by a plumbing update.

Our technicians are background-checked and uniformed, and our phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues. When you schedule Duct Sealing with Hollis, you know who is walking into your home before they arrive. We use professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, and we document our work with before-and-after photos so you can see what changed.

The Garrison Standard means we arrive inside the quoted window, price in writing before touching anything, complete the job by the book, and leave your home clean. That standard applies to every job in Martinez, whether we’re sealing a modern system in a hillside tract home or remediating original ductwork in Alhambra Valley.

HVAC Duct Sealing in Martinez

HVAC Duct Sealing in Martinez often begins with discovery, not application. Many homes in this city were built between 1900 and 1950 with gravity furnaces, octopus duct layouts, and asbestos-wrapped pipe runs that modern sealing methods aren’t designed to handle. We start by camera-inspecting the system, testing static pressure, and documenting any friable materials. Only then do we specify the right combination of repairs, custom sheet-metal transitions, and sealant work.

A typical HVAC duct sealing job in Martinez runs $1,200 – $2,400 for whole-system work on older homes with gravity-furnace conversions, and $800 – $1,600 for standard forced-air systems in newer construction. The price is written down before we begin, and it does not move at the door.

Gravity Furnace Transitions

The large, uninsulated plenum opening at an octopus gravity furnace is often the biggest leak in the system. We build custom sheet-metal transitions that reduce the opening to match modern airflow requirements, then seal all joints with mastic and proper tape. Without this step, sealing branch ducts is largely wasted effort.

Asbestos-Aware Sealing Protocol

When we encounter asbestos-wrapped pipes, we document the condition, stabilize any friable material, and design our sealing approach to avoid disturbance. Standard inflatable-blower sealing is deferred until the hazard is properly managed. This is why our Martinez bids include assessment time that cheaper competitors often skip.

Duct Repair in Martinez

Duct Repair in Martinez frequently involves more than patching a hole. In Alhambra Valley, our crew responded to a 1940s home where the original octopus gravity furnace fed oversized, uninsulated runs; while cleaning we found a crushed return run behind the kitchen wall and disconnected branch ducts in the crawlspace. We repaired the disconnect, reconnected the crushed run, and then applied sealing at the air handler plenum and all accessible supply and return joints, and the blower motor amp draw dropped enough that the homeowner noticed quieter cycles immediately.

Typical duct repair in Martinez ranges from $400 – $900 for isolated fixes like reconnecting a branch or patching a crushed section, to $1,000 – $2,000 when multiple runs need replacement or custom fabrication. We always provide a written price before any work starts.

Disconnected and Crushed Runs

Older Martinez homes often have ducts that have separated at joints or been crushed by later remodeling work. We find these with camera inspection, then repair or replace the damaged section before any sealing begins. Sealing over a disconnected run just traps the leak inside your wall or crawlspace.

Post-Repair Verification

After repair and sealing, we test static pressure and airflow at the registers to confirm the fix. You’ll see the numbers, and you’ll get before-and-after photos of the work. If anything fails within a year, we return at no charge under our 365-Day Done Right Promise.

Trusted Brands We Service in Martinez

We carry equipment and materials from Rotobrush, Nikro, Abatement Technologies, Aprilaire, and Guardsman, the same brands commercial crews rely on. For Martinez homeowners, this means we stock the right fittings, mastics, and filtration components to match your existing system without waiting on special orders. Whether your home uses a standard Honeywell media filter or needs an Aprilaire upgrade after sealing improves your static pressure, we have the parts on the truck. Fast turnaround matters when you’re living with uneven heating or cooling, and we build our inventory around the systems we actually encounter in Contra Costa County homes.

Common Duct Sealing Problems We See in Martinez Homes

• Sealing over disconnected or crushed runs without first repairing them. We find this constantly in crawlspaces beneath downtown Victorians and hillside ranches. The mastic looks fine, but air still leaks into unconditioned space. We camera-inspect first, repair the physical damage, then seal.
• Applying sealant to old asbestos-wrapped pipe sections before stabilization. In homes near Alhambra Valley and the older downtown grid, this risks disturbing friable material and will fail inspection. We document and stabilize first, seal second.
• Ignoring the gravity furnace plenum. That massive opening at the octopus furnace is often the system’s biggest leak. We build custom transitions before touching branch ducts with tape or mastic.
• Skipping camera inspection in tight wall chases. Downtown Martinez Victorians often have ducts rerouted through spaces later invaded by plumbing or electrical. We look before we seal, so we don’t trap a crushed run behind finished walls.

Pricing for Duct Sealing in Martinez, CA

We Also Serve Cities Near Martinez

Our crews work throughout Contra Costa County, including Martinez and neighboring Pleasant Hill, Benicia, Lafayette, and Concord. The same Garrison Standard applies: written price, background-checked uniformed technicians, and the 365-Day Done Right Promise on every job.

FAQs About Duct Sealing in Martinez