Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
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AfterFast, Reliable Duct Sealing Across Granite Bay
Duct sealing in Granite Bay typically runs $450 – $1,200 per HVAC system depending on accessibility and the condition of the existing ductwork, with most multi-system homes falling in the $1,400 – $3,200 range for complete sealing across all zones. We scope every job per system, not as one vague whole-house number, because that’s how Granite Bay’s larger homes are actually built. If your home has two or three independent zones, you’ll get a written price for each before we touch anything.
We’ve worked through the custom neighborhoods off Auburn Folsom Road, the hillside builds near Douglas Ranch, and the estate properties along Barton Road. Our crews dispatch from the Sacramento office and carry enough mastic, metal tape, and support strap inventory to handle the long attic runs and multi-zone layouts that define Granite Bay’s housing stock. When you call (361) 326-5060, a live person answers, and we’ll book you into a window we actually show up for.
Why Hollis Air Duct Cleaning Is Granite Bay’s Preferred Duct Sealing Company
Granite Bay homeowners know the difference between a crew that tapes a few registers and leaves, and one that crawls the full attic run to find where conditioned air is bleeding into a 110°F attic space. We’ve been on enough jobs in this market to know that a 6,000 sq ft home with three zones isn’t three times a standard house, it’s a completely different scope, and we price it that way in writing before any work starts.
Our technicians are background-checked, uniformed, and expected to perform by The Garrison Code: arrive inside the quoted window, price in writing, complete the job by the book, and leave the site clean. That standard matters more in Granite Bay than in most markets because so much of the ductwork here sits in unconditioned attic space over long spans, and sloppy sealing fails fast in that environment.
Every repair we make carries the 365-Day Done Right Promise. If the seal fails, the mastic cracks, or the tape releases within a year, we come back and make it right at no charge, including a free second visit. We put that in writing on every job, not as a verbal assurance that disappears with the van.
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 Insulation in Granite Bay
Duct Insulation in Granite Bay addresses a specific problem created by this market’s combination of hot, dry summers and long duct runs through unconditioned attics. When your supply ducts carry 55°F air through a 100°F+ attic with only thin fiberglass wrap or degraded original insulation, you lose cooling capacity before the air ever reaches the register. We remove the old insulation, seal all joints and connections with mastic and metal tape, then wrap with fresh insulation rated for the temperature extremes these attics see June through September.
Most Granite Bay homes need duct insulation attention when the original wrap has compressed, torn, or pulled away at the straps, which is common on the 1990s-era flex duct runs that sag between support points. A typical duct insulation and sealing job in Granite Bay runs $600 – $1,400 per system depending on linear footage and attic accessibility.
Attic Heat Gain on Long Runs
Granite Bay’s custom homes often push 40 – 60 linear feet of duct through attic space to reach distant zones. Without proper insulation, that air gains 10 – 20°F before delivery. We measure supply temperatures at the air handler and at the register to document the actual loss, then insulate to a standard that closes that gap.
Fire-Rated Materials for Local Code
California Title 24 requires specific insulation R-values and fire-smoke ratings for ductwork in unconditioned spaces. We use products that meet or exceed those standards, not hardware-store wrap that degrades in two seasons of Granite Bay heat.
HVAC Duct Sealing in Granite Bay
HVAC Duct Sealing in Granite Bay is where most homeowners discover their system has been bleeding conditioned air into the attic for years. The symptoms show up gradually: rooms that won’t hold temperature, a blower motor that runs constantly, utility bills that climb every summer without explanation. We pressurize the system and use smoke pencils and thermal imaging to find the leaks, then seal with mastic for permanent joints and metal-backed tape for flex connections that need future access.
On a 6,200 sq ft multi-level home off Auburn Folsom Road with three separate HVAC systems, our tech found the upstairs zone’s original flex trunk sagging into a debris slough at the low point, bleeding conditioned air into a 100°F+ attic all summer. We performed camera inspection of the supply and return ducts, then isolated and sealed the sagging runs and the leaking return-side connections feeding the air handler, verifying with a blower-door check before we closed up. The homeowner’s second-story rooms finally held temperature through the afternoon peak instead of running the blower motor nonstop.
A typical HVAC duct sealing job in Granite Bay runs $450 – $1,200 per system. Whole-home scopes for two- or three-system houses generally fall between $1,400 – $3,200.
Return-Side Sealing for Smoke Intrusion
Granite Bay’s wildfire season pulls smoke odor through leaky return ducts and blower compartments. Sealing only the supply side leaves that pathway open. We always include return-side sealing and blower compartment inspection in our scope, because in this market, it’s part of the job, not an upsell.
Per-System Diagnosis on Multi-Zone Homes
A three-system home needs three separate evaluations. The zone that runs hottest in the attic often has the worst sag and the most leaks, but it’s easy to miss if you’re treating the house as one generic scope. We isolate each system, test each independently, and report findings per zone.
Trusted Brands We Service in Granite Bay
Our trucks carry sealing and insulation materials from Abatement Technologies, Aprilaire, and Guardsman, plus the rotary brush systems and negative-air equipment from Rotobrush and Nikro that we use for the cleaning work that often precedes sealing. We don’t run to the supply house mid-job because we stock for Granite Bay’s specific housing stock: the wide-diameter flex duct common in 1990s builds, the rigid metal trunk lines in newer custom homes, and the transition fittings where zone dampers meet main supplies. That inventory means we can complete most sealing jobs in one visit, with the materials already on the van matched to what your system actually uses.
Common Duct Sealing Problems We See in Granite Bay Homes
- Sagging flex duct at low points in unconditioned attics. The 1990s-era homes along Auburn Folsom Road often still run original flex duct that wasn’t supported on proper intervals. Low points collect debris and condensation slough, and the sag itself creates gaps at the connections. We re-support before we seal, or the seal fails when the duct settles again.
- Return-side leaks pulling wildfire smoke and pollen into the system. Granite Bay’s spring oak pollen and late-summer wildfire smoke find their way in through gaps in the return plenum, filter rack, and blower compartment. Sealing only the supply registers leaves this pathway wide open.
- Three-system homes scoped as one flat price. A 4,000 – 8,000 sq ft home with independent upstairs, downstairs, and guest zone systems needs per-system evaluation. The attic zone that runs 120°F in August usually has the worst leakage, but gets skipped when the scope assumes one uniform condition.
- Original flex duct approaching end of service life. The 1990s flex has a 20 – 25 year realistic lifespan in Granite Bay’s heat. When the inner liner is brittle and the insulation wrap is degraded, sealing alone is a temporary fix. We tell you when replacement is the honest recommendation, and we document it with camera footage you can see.
Pricing for Duct Sealing in Granite Bay, CA
A typical single-system duct sealing in Granite Bay runs $450 – $1,200. Two-system homes generally fall in the $950 – $2,200 range. Three-system properties, common in the 5,000+ sq ft builds off Barton Road and in the Douglas Ranch area, typically run $1,400 – $3,200 for complete sealing across all zones.
What moves the price: attic accessibility (cathedral ceilings over finished space make some runs reachable only by cutting access), the condition of existing flex duct (sagging runs need re-support before sealing), and whether return-side sealing is included (it always is with us, but some competitors quote supply-only to hit a lower number). We give you one flat price per system, agreed in writing before work starts. No per-vent pricing, no add-ons at the door, no “we found another problem” once the van is in your driveway.
Every sealing job includes before-and-after documentation: camera footage of the duct interior, thermal images of leak locations, and blower-door test results where applicable. You see what we saw, and you see what changed. Call (361) 326-5060 for a free estimate. We’ll scope your systems, give you written pricing per zone, and let you decide without pressure.
We Also Serve Cities Near Granite Bay
Our crews work throughout the Sacramento metro foothills, including Duct Sealing in Granite Bay as well as Roseville, Rocklin, Orangevale, and Loomis. Dispatch and scheduling are coordinated from our Sacramento office, with local crews serving each market. If you’re in a nearby city and found this page because you’re comparing options, the same per-system pricing structure and 365-Day Done Right Promise apply. Call (361) 326-5060 and we’ll confirm coverage for your address.
Serving Granite Bay, CA - Our Local Coverage Area
We’re based in the Granite Bay area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Duct Sealing in Granite Bay
Because Granite Bay’s 4,000 – 8,000 sq ft homes typically have two or three independent HVAC zones with separate air handlers, duct networks, and attic runs. The upstairs zone often runs through the hottest part of the attic and has the worst leakage, while a downstairs zone in a conditioned basement might need minimal work. A whole-house flat rate either overcharges you for the easy zone or underfunds the crew to do the hard one right. We diagnose and price each system separately, and you get written scope for each before we start. Call (361) 326-5060 for a free per-system estimate.
It depends on the condition of the flex itself. If the inner plastic liner is still flexible and the insulation wrap is intact, re-supporting sags and sealing connections with mastic can extend service life 5 – 10 years. If the liner is brittle, cracked, or the insulation is compressed and falling away, sealing is a temporary fix and replacement is the honest recommendation. We camera-inspect every run and show you the footage before we quote either option. Call (361) 326-5060 to schedule an inspection.
Yes. In Granite Bay, return-side leaks are the primary pathway for wildfire smoke odor to enter the conditioned air stream. The return plenum, filter rack gaps, and blower compartment pull attic air directly into the system, and during red-flag days that attic air is laden with smoke particles. Sealing these pathways, combined with a proper filter seal, materially reduces odor intrusion. We include return-side sealing in every scope because in this market, it’s standard, not optional. Call (361) 326-5060 for an evaluation of your return ductwork.
Before-and-after camera footage of the duct interior, thermal images showing leak locations and temperatures, and a written report noting which runs were sealed, which were re-supported, and any recommendations for replacement or additional insulation. For multi-system homes, we document per zone so you know which system got what. The 365-Day Done Right Promise is included in writing with that documentation. If anything fails within a year, the paperwork tells us exactly what was done and where to find it. Call (361) 326-5060 and we’ll walk you through a sample report.
A properly sealed rigid metal or supported flex duct system should last 15 – 20 years in Granite Bay’s dry climate. The failure points are usually not the seal itself but new sags developing in unsupported flex, or vibration working tape loose at blower connections. We inspect support spacing and mechanical connections as part of the sealing job to prevent those failures. If your home still has original 1990s flex duct, plan on inspection every 3 – 5 years even if the initial sealing holds. Call (361) 326-5060 to schedule a check.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Granite Bay as part of the Garrison Partners family since 2004.