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 Parkway
Duct sealing in Parkway typically runs $800 – $2,400 for a whole-home job depending on system size and accessibility, with most crawlspace homes in the area falling in the $1,200 – $1,800 range. We can usually inspect and price the work within a day or two, and our Duct Sealing crews are already working in Parkway neighborhoods regularly. Call (361) 326-5060 for a free written estimate.
We’ve been crawling under Parkway homes since 2004, and the pattern is consistent: raised foundations, long uninsulated duct runs, and original mid-century materials that were never meant to last this long. Homes near the American River Parkway face added pressure from fall wildlife seeking warmth. Our dispatch and scheduling are coordinated from our Sacramento office, but the crews serving Parkway live and work locally. They know the difference between a post-war tract near Fair Oaks Boulevard and a farmhouse off the parkway corridor, and they know what each construction type hides in its crawlspace.
Why Hollis Air Duct Cleaning Is Parkway’s Preferred Duct Sealing Company
Hollis Air Duct Cleaning operates under The Garrison Standard, which means written prices before any work starts, arrival inside the quoted window, and a 365-Day Done Right Promise backed in writing on every job. If the seal fails within a year, we return and make it right at no charge, including a free second visit.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. They carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, not hardware-store gear, and they explain what they’re finding in plain terms while they work.
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 for Parkway homeowners who want to schedule or ask questions.
Roy Castellanos leads our operation, and The Garrison Code governs how every technician behaves on a job: arrive squared away, price in writing, complete the work by the book, leave the site clean. That discipline is why Parkway customers who’ve been burned by no-shows and ballooning estimates stick with Hollis.
Duct Insulation in Parkway
Duct Insulation in Parkway is often the companion job to sealing, because extreme summer heat cycling on uninsulated attic and crawlspace runs bakes off cheap sealant within a season or two. We install wrap insulation on accessible ductwork after sealing is complete, using materials rated for the temperature swings these homes see.
When Insulation Becomes Necessary
Many Parkway homes have original fiberglass wrap that has compressed, torn, or been pulled down by rodents. Once we seal the leaks, uninsulated metal or flex duct in a 140-degree crawlspace or attic loses its conditioned air to thermal transfer before it reaches the register. We see this most in the mid-century ranches between Fair Oaks Boulevard and the American River Parkway, where the crawlspace runs can be 30 feet or longer.
What We Use and Why
Our crews carry foil-faced fiberglass wrap and closed-cell foam products from Honeywell and Aprilaire. We match the insulation to the duct material and the space constraints. In tight Parkway crawlspaces, low-profile wrap with proper vapor barrier performs better than bulky batts that get crushed against joists.
HVAC Duct Sealing in Parkway
HVAC Duct Sealing in Parkway starts with finding the leaks that matter, not just the ones that are easy to reach. We use pressure testing and camera inspection to locate disconnected branch runs, failed trunk takeoffs, and rodent damage before we quote the work. The price you get is the price you pay.
The Inspection Process
We pressurize the duct system and measure static loss, then run a camera through supply and return lines to document every separation, crush, and gap. In Parkway’s raised-foundation homes, the worst leaks are often at trunk-to-branch takeoffs in the crawlspace, not at the register where a homeowner might look. This step takes 45 minutes to an hour, and it prevents the patch-and-pray approach that fails within a year.
Materials and Application
We seal with mastic and reinforced mesh at metal joints, and replace chewed or degraded flex duct with new insulated flex secured with proper collars and sealed with UL-181 tape where appropriate. For rodent entry points, we install chew-resistant screening before sealing. The work is verified with a post-seal pressure test, and we show the homeowner before-and-after footage from the camera inspection.
Trusted Brands We Service in Parkway
Hollis stocks parts and materials from Nikro, Honeywell, and Aprilaire, which means most Parkway jobs don’t wait on ordered components. Our Nikro negative-air machines and HEPA filtration systems handle source removal before sealing begins. Honeywell and Aprilaire insulation and filtration products integrate with the systems we encounter in older Parkway homes, from original gravity furnaces to updated forced-air retrofits. Fast turnaround matters when fall temperatures drop and the heating season starts. We carry enough inventory on the van to complete most sealing and insulation jobs in a single visit once the inspection is done.
Common Duct Sealing Problems We See in Parkway Homes
- Failed original sealant at trunk takeoffs. The duct tape and mastic applied in the 1950s and 1960s has dried, cracked, and fallen away. We find powdery residue and bare metal gaps that have been leaking for decades, especially in homes with limited attic or crawlspace access where previous owners never looked.
- Rodent damage near the American River Parkway. Fall wildlife pressure is real in this corridor. Mice and rats chew through flex duct and insulation, and their entry paths reopen sealed joints within a season if the access point isn’t blocked with chew-resistant screening first.
- Crushed or disconnected branch runs on raised foundations. The register looks fine from the living room, but the duct is blowing conditioned air into the crawlspace through a gap at the trunk. Camera inspection finds these every week in Parkway’s older neighborhoods.
- Heat-cycled sealant failure in uninsulated runs. Parkway’s 100-degree summer days bake cheap latex or tape adhesives off metal duct. Proper mastic with mesh reinforcement, applied after insulation is addressed, survives where quick fixes fail.
Pricing for Duct Sealing in Parkway, CA
A typical whole-home duct sealing job in Parkway runs $800 – $2,400. Small systems with accessible attic ductwork and minimal damage start near $800 – $1,200. Full crawlspace jobs on larger homes with multiple disconnected runs, rodent damage, and needed insulation replacement fall in the $1,600 – $2,400 range. Most Parkway homes we see land at $1,200 – $1,800.
What moves the price: system size (number of supply and return branches), accessibility (crawlspace height, attic hatch location), extent of rodent or moisture damage requiring duct replacement before sealing, and whether duct insulation is needed alongside the sealing work. We do not quote per-vent or per-register pricing. One flat price per system, agreed in writing before any work starts.
Every estimate includes the pressure test, camera inspection, source removal under negative pressure with HEPA filtration, sealing materials, and post-job verification. Call (361) 326-5060 for an exact quote. Estimates are free.
We Also Serve Cities Near Parkway
Our crews travel throughout the region for scheduled duct sealing and insulation work. We regularly serve Los Angeles, San Diego, San Jose, and San Francisco, with the same written pricing and 365-Day Done Right Promise that Parkway customers receive. If you’re outside Parkway city limits, call (361) 326-5060 to confirm service to your address.
Serving Parkway, CA - Our Local Coverage Area
We’re based in the Parkway 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 Parkway
Most failures trace to three causes: cheap sealant baked off by extreme summer heat in uninsulated runs, rodent reopening of sealed joints after fall entry, or sealing done without pressure testing so the real leaks at trunk takeoffs were never found. We address all three by using mastic and mesh rated for temperature cycling, installing chew-resistant screening at entry points, and verifying with pre- and post-seal pressure tests. Call (361) 326-5060 if your last sealing job didn’t last.
Yes, nearly always. Original farmhouses and mid-century tracts in Parkway have uninsulated metal duct or degraded fiberglass wrap in crawlspaces and attics. Sealing the leaks stops pressure loss, but thermal transfer through bare metal still wastes energy. We insulate after sealing so the conditioned air arrives at temperature. Call (361) 326-5060 for a combined quote.
We start with pressure testing and camera inspection of the full system, including crawlspace runs that previous crews may have skipped. We remove debris and rodent nests under negative pressure with HEPA filtration, replace damaged flex duct, seal trunk takeoffs with mastic and mesh, reconnect separated branch runs, install chew-resistant screening at entry points, insulate accessible ductwork, and verify with a post-seal pressure test. The homeowner receives before-and-after camera footage and a written 365-Day Done Right Promise. Call (361) 326-5060 to schedule.
Pressure testing measures static loss across the system. Dirty ducts restrict airflow but maintain pressure; leaking ducts lose pressure at the gap. We quantify the loss, then use camera inspection to locate the exact points. In Parkway homes, we often find both problems, but sealing without source removal traps debris, and cleaning without sealing wastes the effort. We address both in the proper sequence. Call (361) 326-5060 for an inspection.
Yes, especially here. Parkway’s 100-degree summer days and high cooling loads mean every cubic foot of conditioned air lost to a crawlspace leak costs real money. A typical Parkway home with 20 – 30% duct leakage, common in pre-1978 construction, can see cooling energy drop 15 – 25% after proper sealing and insulation. The payback period is usually 2 – 4 years, and the comfort improvement is immediate. Call (361) 326-5060 for a free estimate and written price.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Parkway and the surrounding region since 2004.