Duct Sealing in Santa Rosa - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Santa Rosa

Duct sealing in Santa Rosa typically runs $800 – $2,400 for a whole-house system, depending on whether we’re reconnecting separated rigid metal runs in a 1960s ranch or sealing flex-duct plenum connections in a newer rebuild. Most Santa Rosa jobs take a single day, and we give you a written price before any work starts. Call (361) 326-5060 for a free estimate.

Call (361) 326-5060

We’ve worked in Santa Rosa long enough to know the ductwork here isn’t like the rest of the Bay Area. The post-WWII ranch tracts in Rincon Valley, the 1970s builds off Mendocino Avenue, and the Fountaingrove rebuilds after Tubbs each carry different leak paths, different materials, and different smoke loads. Our crews dispatch from the San Francisco Bay Area office and serve Santa Rosa locally, so we understand how the Mayacamas winds drive ash into returns during red-flag events and why sealing matters more here than in cities that don’t burn every few years.

Why Hollis Air Duct Cleaning Is Santa Rosa’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 before touching equipment, complete the job by the book, and leave the site clean. In Santa Rosa, that standard means something specific. Homeowners here have watched crews come and go after fire season, some with low teaser prices that ballooned once the van was in the driveway. We don’t do that.

Our Duct Sealing in Santa Rosa crews are background-checked and uniformed. You know who’s walking into your home before they arrive. Every repair is backed by our 365-Day Done Right Promise: if the seal fails within a year, we return and make it right at no charge, including a free second visit. The price we write down before work starts is the price you pay. No per-vent add-ons, no surprise charges at the door.

Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday to schedule.

Duct Repair in Santa Rosa

Duct Repair in Santa Rosa usually means reconnecting separated rigid metal runs, replacing crushed flex duct, or rebuilding plenum connections that have pulled apart after decades of seasonal expansion and smoke-event pressure spikes. Typical repairs run $400 – $1,200, depending on accessibility and whether we need to open a soffit or chase. We always inspect with a camera before quoting, so you see what we see.

Disconnected Rigid Metal Runs

The original galvanized steel ductwork in 1960s-70s Santa Rosa ranch homes was built to last, but the collars and seams weren’t. After fifty years of heating and cooling cycles, joints separate. Add a fall red-flag event with the HVAC running, and the negative pressure pulls ash through every gap. We reconnect with mechanical fasteners and mastic, then pressure-test to confirm the seal holds.

Crushed or Damaged Flex Duct

In crawl spaces and attics across Bennett Valley and the west side, we’ve found flex duct flattened by storage boxes, rodent damage, or installers who treated it like electrical cable and pulled it too tight. Crushed flex doesn’t move air; it creates back-pressure that blows other joints loose. We replace the damaged section and verify flow with a manometer.

Air Duct Sealing in Santa Rosa

Air Duct Sealing in Santa Rosa is most often a whole-system job on homes with original rigid metal ductwork that has never been properly sealed at the joints. Full sealing runs $800 – $2,400. We use mastic and reinforced mesh on metal systems, and UL-181 tape plus mastic on flex connections. The goal is simple: every joint airtight, every return pulling from the house, not the attic or crawl space.

Smoke-Ash Remediation Sealing

After Tubbs, Kincade, or Glass, Santa Rosa homeowners call us about smell, not dust. Ash and char particulate enter through leaks in the return path and coat the blower wheel and plenum. Cleaning removes the residue; sealing prevents the next event from doing the same damage. In Coffey Park rebuilds and Fountaingrove homes, we’ve documented grey ash staining in returns months after the visible smoke cleared.

Static Pressure Reduction

Older Santa Rosa systems with too few returns run high static pressure. That pressure finds every weak joint and pushes supply air into the attic or pulls attic air into the return. Sealing lowers the static load, reduces blower motor strain, and stops the cross-contamination that makes fire-season ash a recurring problem.

Trusted Brands We Service in Santa Rosa

We carry parts and sealing materials from Abatement Technologies, Guardsman, and Aprilaire, so most Santa Rosa jobs don’t wait on shipping. Our equipment roster includes Rotobrush rotary brush systems for pre-seal cleaning and Nikro negative-air machines for source removal. When we seal a system, we use the same mastic and mesh tapes that commercial crews specify, not hardware-store caulk. That means faster turnaround for Santa Rosa homeowners and seals that hold through fire season, pollen season, and the temperature swings of a Sonoma County winter.

Common Duct Sealing Problems We See in Santa Rosa Homes

• Original rigid metal joints separated in Rincon Valley ranches. The 1960s-70s tract homes off Montecito Boulevard and Yulupa Avenue were built with unsealed collars that loosen after decades of thermal cycling. After a red-flag wind event, ash pulls through every gap and deposits on the blower wheel even when registers look clean.
• High static pressure blowing reconnected branches loose. Systems with only one or two returns can’t move enough air without strain. We see this in Bennett Valley ranch homes where a previous contractor reconnected a fallen run but skipped mastic and mechanical fasteners. The joint fails before the smoke odor does.
• Flex-duct plenum leaks in Fountaingrove and Coffey Park rebuilds. Post-Tubbs construction used flex duct and tighter envelopes, but the plenum connections and the negative-pressure path still leak. Sealing must target the new connections, not the original metal runs that no longer exist.
• Return-side plenum ash contamination after Glass or Kincade. Homeowners in the hills west of Santa Rosa report persistent smoke odor from vents months after evacuation orders lift. The ash is in the plenum and blower, not the branches. Sealing the return path prevents recontamination.

Pricing for Duct Sealing in Santa Rosa, CA

We Also Serve Cities Near Santa Rosa

Our crews work throughout Sonoma County, including Santa Rosa and the surrounding communities of Sebastopol, Windsor, Rohnert Park, and Cotati. Whether you’re in a 1940s farmhouse west of Sebastopol or a newer development in Windsor, we apply the same standard: inspect first, price in writing, seal to hold pressure, and back it for a full year.

FAQs About Duct Sealing in Santa Rosa