Duct Sealing in Riverside - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Riverside

Duct sealing in Riverside typically costs $450 – $1,200 for a whole-home seal, depending on how much of the system we need to open up and whether we’re repairing original metal trunk lines or flex duct runs. Most Riverside jobs take a half day to a full day, and we quote the full price in writing before touching anything. Call (361) 326-5060 for a free estimate.

Call (361) 326-5060

We’ve worked in Riverside since 2004 as part of the Garrison Partners family, and our Inland Empire office dispatches crews daily to homes from the Wood Streets to Orangecrest. We know the difference between a 1920s Craftsman bungalow with retrofit ductwork stapled through a crawlspace and a 1990s tract home in Mission Grove with flex runs that separate at every joint. That local knowledge changes what we quote, what we seal, and what we replace instead.

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

Hollis Air Duct Cleaning has built a reputation in Riverside by doing what we said we’d do, at the price we wrote down. Our Duct Sealing in Riverside crews arrive inside the quoted window, in uniform, with background-checked technicians who’ve been trained on The Garrison Code. No callbacks that never come. No price that jumps once the van is in your driveway.

Our customers in Riverside mention the same things in feedback: we showed up when promised, we explained what we found before we fixed it, and we left the site clean. The 365-Day Done Right Promise backs every job in writing. If a sealed joint fails or a mastic seam cracks within a year, we return and make it right at no charge, including a free second visit.

Dispatch and scheduling run from our Inland Empire office, so we’re not routing crews from Los Angeles or San Diego and hoping they hit the 91 on time. That matters when you’re trying to schedule around work, kids, or the next Santa Ana wind event.

Air Duct Sealing in Riverside

Air Duct Sealing in Riverside is often the real fix behind rooms that never cool, utility bills that climb every summer, and dust that reappears days after cleaning. Riverside’s combination of 100°F+ attic heat, abrasive silt from Santa Ana wind events, and decades-old duct materials means leaks develop faster here than in coastal markets, and they cost more if ignored.

We camera-inspect before we quote. That’s non-negotiable on a Riverside job. The grit that blows off the Santa Ana River wash and nearby hills is unusually abrasive. It works its way into mastic seams and pulls duct tape loose years earlier than in Orange County homes with marine-layer moisture to settle the dust. Cameraing first lets us show you exactly which joints are failed, which runs are crushed, and where silt has accumulated behind a tape patch that looked fine from the outside.

Typical Air Duct Sealing in Riverside runs $450 – $900 for partial-system work focused on accessible attic trunk lines and major branch connections. Whole-home sealing that includes crawlspace runs, multiple crushed branches, or replacement of failed flex duct sections ranges $700 – $1,200. We write the price before we start. It does not move.

Sealing Original Metal Ductwork

Mid-century homes in Riverside’s Eastside and University neighborhoods often have original galvanized metal trunk lines from the 1950s or 1960s. The mastic and duct tape of that era has long since hardened or fallen away. We remove the old material, clean the joint with a wire brush, apply fresh mastic, and wrap with Guardsman reinforcement mesh. For split seams or holes, we patch with sheet metal and seal the perimeter.

Flex Duct Repair and Reconnection

Orangecrest and Mission Grove homes built from the 1980s through the 2000s use flexible duct with an inner plastic liner that separates at joints under heat cycling. Tape alone traps silt against the tear. We cut back to sound material, reconnect with a mechanical collar, seal with mastic, and support the run properly so it doesn’t sag and separate again.

Duct Sealing Services in Riverside

Duct Sealing - Riverside services cover more than squirting foam into a register. We seal the full distribution system: trunk lines in the attic, branch connections, crawlspace runs, and the return plenum at the air handler. Every gap we close is air you’re no longer paying to cool in July or heat in January.

Because Riverside’s HVAC systems run hard from May through October, even small leaks add up. A 15% duct leakage rate, common in homes we inspect, means 15 cents of every conditioning dollar is lost to the attic or crawlspace. In a Riverside summer, that shows up fast on your SCE bill. Our Duct Sealing team measures static pressure before and after sealing to prove the system is moving air where it was designed to go.

Most Duct Sealing Services in Riverside fall between $450 and $1,200. Single-zone partial sealing on accessible attic trunk lines starts around $450. Whole-home systems with multiple problem zones, crawlspace access, or replacement of failed flex sections run toward the upper end. We quote free. The price is written. It holds.

Static Pressure Testing and Verification

We don’t guess. After sealing, we measure static pressure at the air handler and compare it to manufacturer specs and our pre-seal baseline. If the numbers don’t improve, we find out why before we leave. That verification is part of every job, not an upsell.

Camera Documentation

Our Rotobrush camera system records before-and-after footage of the sealed joints and any replaced sections. You see what we saw. No “trust us” required.

Trusted Brands We Service in Riverside

Hollis stocks professional-grade sealing materials and filtration products from Guardsman, Aprilaire, and Abatement Technologies, the same lines commercial HVAC crews specify. We don’t use hardware-store duct tape or consumer-grade mastic that cracks in a Riverside attic within two seasons. For flex duct repairs, we carry mechanical collars and supported connection hardware that meets California Title 24 energy standards. Parts are on the van, so most Riverside jobs finish in one visit without waiting on a supplier run to San Bernardino or Corona.

Common Duct Sealing Problems We See in Riverside Homes

• Failed mastic on Eastside and University metal trunk lines. Original mid-century ducts in these neighborhoods were sealed with mastic that hardens and cracks under decades of 100°F+ attic heat. Santa Ana silt works into the gaps, accelerating corrosion and pulling joints open. We scrape to bare metal and reseal with Guardsman mesh-reinforced mastic rated for high-temperature cycling.
• Retrofit runs in Wood Streets and Northside Craftsman homes with no collar seal. These bungalows often have ductwork added decades after construction, with flex runs stapled through attics or crawlspaces and no mastic where the flex meets the trunk. Every gap pulls Santa Ana dust into the system. We collar, mastic, and support each connection.
• Separated flex duct liners in Orangecrest and Mission Grove tract homes. The inner plastic liner of 1980s – 2000s flex duct pulls away from the wire helix at joints, especially where installers left the duct unsupported. Tape-over sealing traps abrasive silt against the tear and masks the real problem. We replace damaged sections and reconnect with proper mechanical supports.
• Crushed branches from attic storage or rodent damage near the Santa Ana River bottom. Homes in Alessandro Heights and areas near the wash see more rodent activity and homeowner storage traffic in attics. A crushed branch kills airflow to a bedroom or office. We repair or replace the run, seal all connections, and verify airflow at the register.

Pricing for Duct Sealing in Riverside, CA

We Also Serve Cities Near Riverside

Our Inland Empire crews work throughout the metro, including Riverside and neighboring Grand Terrace, Bloomington, Colton, and Loma Linda. Same written pricing, same 365-Day Done Right Promise, same background-checked uniformed technicians at every stop.

FAQs About Duct Sealing in Riverside