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 Inglewood
Most duct sealing jobs in Inglewood run $400 – $1,200 for a whole-house seal, depending on whether we’re working with original ductwork or one of the retrofitted systems common in older homes. Our Duct Sealing in Inglewood crews are dispatched from the Los Angeles office and typically book within 2 – 3 business days. We serve the full Inglewood grid, from the century-old bungalows near Manchester Square to the postwar stucco tracts off Crenshaw and the newer builds around SoFi Stadium.
Inglewood’s housing stock is unlike neighboring markets. Many homes here were built as streetcar suburbs in the 1920s – 1940s, long before forced-air HVAC was standard. The ductwork you have now was likely patched in during a 1960s or 1980s retrofit, running through attics, crawl spaces, or under floors in ways no original blueprint predicted. That matters for sealing because every joint, splice, and transition is a potential leak point that a technician rushing through a checklist will miss.
Call (361) 326-5060 for a free written estimate. We’ll inspect the full duct run with a camera, price the seal in writing before any work starts, and back it with our 365-Day Done Right Promise.
Why Hollis Air Duct Cleaning Is Inglewood’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our Duct Sealing team has worked enough Inglewood homes to know the local patterns. Homes within a mile of the 405/La Cienega corridor pull in heavy black freeway soot that binds to damp duct liner. The marine layer that rolls in from the coast keeps under-floor duct runs more humid than inland LA systems. These aren’t abstract climate facts. They determine whether a seal will hold or fail within a season.
Our technicians are background-checked, uniformed, and expected to work by The Garrison Code: arrive inside the quoted window, price in writing, complete the job by the book, leave the site clean. Every repair is covered for 365 days. If it fails, we return and make it right at no charge, including a free second visit. No negotiation, no runaround.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops. No callback queues.
Duct Insulation in Inglewood
Duct Insulation in Inglewood addresses a specific problem: retrofitted duct systems in older homes lose conditioned air through thin or degraded wrap, especially in attic and under-floor runs where the marine layer keeps ambient humidity high. A typical insulation job here runs $600 – $1,800 depending on linear footage and accessibility. We see this most often in 1950s – 60s stucco tracts where the original fiberglass wrap has compressed or torn, and in bungalows where ducts were later added to unconditioned spaces never meant to carry heated or cooled air.
When Insulation Matters More Than Sealing
Some Inglewood homes have structurally sound ducts with intact joints but no thermal barrier. The air arrives at the register at the wrong temperature, and the HVAC runs longer to compensate. We assess with a thermal camera before recommending insulation versus sealing, or both. No point charging for work that won’t solve the actual failure.
Material and Method
We use professional-grade foil-faced fiberglass wrap or closed-cell foam where space and code allow, installed after any sealing is complete. Sealing first, insulating second. Reversing that order traps air leaks behind the insulation where they continue to waste energy and can draw in attic dust or crawl-space moisture.
HVAC Duct Sealing in Inglewood
HVAC Duct Sealing in Inglewood is the process of closing leaks in the supply and return ductwork so conditioned air reaches the rooms it was meant for, not the attic or crawl space. A typical whole-house seal runs $400 – $1,200 in this market. We use mastic compound and mechanical fasteners on metal duct, and specialized sealant on flex runs, after a camera inspection maps every leak. This is not tape slapped on a joint. Mastic remains flexible, handles thermal expansion, and lasts the life of the duct when applied correctly.
Pressure Testing After the Seal
We run a duct blaster or static pressure test after sealing to verify the result. If the system doesn’t hit the target pressure differential, we find the missed leak and close it. The homeowner sees the numbers. No guesswork, no “trust us, it’s better.”
Retrofit Systems Need Retrofit Thinking
Inglewood’s ad-hoc duct layouts often mean a sealed supply branch changes airflow balance in ways a modern system was designed to handle but a 1970s retrofit wasn’t. We check register flow at each vent and adjust dampers or recommend minor modifications so sealing doesn’t create hot spots or overwork the blower.
Trusted Brands We Service in Inglewood
Our equipment roster includes Nikro negative-air machines, Honeywell filtration components, and Aprilaire media cleaners. We stock common sealing and insulation materials for Inglewood jobs so we’re not waiting on a parts run while your system is open. For homes with integrated air cleaners or UV systems, we carry Abatement Technologies replacement media. The tools are professional-grade, not hardware-store gear, and our technicians explain what each piece does and why it matters to your specific duct layout.
Common Duct Sealing Problems We See in Inglewood Homes
- Sealing over damp, microbially-active surfaces without source removal. Inglewood’s marine-layer humidity keeps under-floor duct liner damp year-round. Slapping mastic or sealant over active microbial growth traps moisture and organic material behind a vapor barrier. The smell returns within weeks. We remove the source first, then seal.
- Ignoring the ad-hoc retrofit layout of streetcar-suburb bungalows. A supply branch sealed without checking total system static pressure can back-pressure a blower motor that was already near its limit. We measure before and after. The amperage drop tells us the seal worked, not just that it looks neat.
- Using fogging “sanitizers” as a substitute for negative-pressure source removal. We were called to a 1920s bungalow off Manchester Square where the homeowner had been quoted a “duct sanitizer fog” by another company. Our tech ran a camera inspection and found the under-floor return duct was lined with damp, salt-affected debris and microbial growth. The fog would have masked it, not removed it. We set up negative pressure with HEPA filtration, used agitation tools to dislodge the caked soot and lint, then applied duct sealing to close the leaks that were pulling in more marine air. The blower motor amperage dropped back to spec and the musty smell was gone.
- Missing the freeway-soot factor in 405-adjacent homes. Heavy black particulate buildup in return ducts near the 405/La Cienega and Manchester Square corridors isn’t ordinary household dust. It’s a mix of freeway soot and decades of accumulation that binds to damp liner. Standard brushing won’t dislodge it. We use rotary agitation and negative-air extraction before any sealant touches the surface.
Pricing for Duct Sealing in Inglewood, CA
Whole-house duct sealing in Inglewood typically runs $400 – $1,200. Duct insulation runs $600 – $1,800. Combined sealing and insulation jobs for full retrofitted systems range $1,000 – $2,400. What moves the number: linear footage of duct, accessibility (attic crawl versus open basement), condition of existing joints, and whether we find damage requiring repair before sealing can be effective.
We give one flat price per system, agreed in writing before work starts. No per-vent pricing. No add-ons at the door. The price you approve is the price you pay. Estimates are free. Call (361) 326-5060 to schedule.
We Also Serve Cities Near Inglewood
Our crews work throughout the west LA basin, including Inglewood plus Hawthorne, Culver City, El Segundo, and Lawndale. The same written pricing, same 365-Day Done Right Promise, same background-checked uniformed technicians apply in every service area.
Serving Inglewood, CA - Our Local Coverage Area
We’re based in the Inglewood 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 Inglewood
No, not if the smell comes from microbial growth on damp duct liner. Sealing over active growth traps moisture and organic material behind the sealant. The odor returns. We remove the source with negative-pressure extraction and HEPA filtration first, then seal the leaks that were pulling in humid marine air. Call (361) 326-5060 for an inspection and exact quote.
Yes, and these retrofits are common in Inglewood’s 1920s – 1940s streetcar-suburb housing stock. We camera-inspect the full run first to map joints, splices, and any damage from decades of moisture exposure. Sealing is straightforward once we know what previous contractors patched in. We also check system static pressure so sealing doesn’t overwork an older blower motor.
Inglewood’s coastal humidity keeps under-floor and crawl-space duct runs damp year-round, far more than inland systems. That moisture supports microbial growth on duct liner that a fogging “sanitizer” cannot fix. Sealing must follow source removal, or the sealant traps active growth behind it. Inland LA homes dry faster between weather events and rarely show the same salt-air corrosion on metal joints we see here.
No. A fogging treatment deposits a chemical mist on interior surfaces. It does not remove debris, soot, or microbial growth. In Inglewood homes, where freeway soot binds to damp liner, the fog perfumes the odor while the underlying problem remains. We use negative-pressure source removal with agitation tools, verified with before-and-after camera documentation. The debris leaves the house through a HEPA-filtered vacuum, not your living room air.
Homes within a mile of the 405 typically need cleaning on a shorter cycle than the rest of Inglewood due to heavy black particulate accumulation in return ducts. Every 2 – 3 years is common for these addresses, versus 3 – 5 years for inland neighborhoods. Sealing is done once, inspected annually. If you’re noticing reduced airflow, longer HVAC run times, or musty odors, call (361) 326-5060 for a camera inspection and we’ll tell you exactly what you’re dealing with. For dedicated service, see our Inglewood Dryer Vent Cleaning.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Inglewood since 2004.