Fast, Reliable Duct Repair & Sealing Across Florence-Graham
Duct repair and sealing in Florence-Graham typically runs $180-$650 depending on whether we’re patching a single leak or resealing an entire system, and most jobs are completed in one visit. We’re Bellows Air Duct & Vent Co. of California, and we’ve been driving out to Florence-Graham from our Los Angeles base for over 42 years. If you live off Graham Avenue, near Firestone Boulevard, or closer to the I-110 corridor, we’re usually there within the hour. Call (855) 401-6006 for a free estimate - we’ll give you the full price before we touch a single tool.
Why Bellows Air Duct & Vent Co. of California Is Florence-Graham’s Preferred Duct Repair & Sealing Company
We’ve built our reputation in Florence-Graham one repair at a time. Homeowners here know we’re the company that shows up when we say we will, explains what’s actually wrong with their ducts, and fixes it without trying to sell them a whole new system they don’t need.
Our technicians know the difference between a 1950s galvanized trunk line and a 1970s flex duct retrofit because they’ve crawled through both in Florence-Graham attics. They know the county code quirks that affect rental properties here. That local knowledge saves time and money.
Calls to our office are answered by a live person, 24 hours a day. Not a voicemail tree. Not an app. A real person who can dispatch a background-checked, uniformed technician to Florence-Graham today.
Every job carries our 90-Day Done Right Promise in writing. If it’s not right, we make it right. No paperwork, no arguing.
Our Duct Repair & Sealing Services in Florence-Graham
Metal Duct Repair
Most Florence-Graham homes built between the 1940s and 1960s have original galvanized steel ductwork. That metal lasts, but the seams and joints don’t. We recently serviced a 1952 duplex on Graham Avenue where the galvanized metal duct trunk had a fist-sized hole rusted through near the furnace plenum, wrapped with duct tape that had failed. We cut out the corroded section, installed a new 18-gauge metal patch, and sealed all joints with mastic - restoring airflow to both units without replacing the entire system. Metal duct repair in Florence-Graham typically runs $280-$550.
Mastic Sealant Application
Here’s something most contractors won’t tell you: decades of baked-on industrial soot and grease from Vernon’s meatpacking and chemical plants degrade mastic seals in Florence-Graham homes at rates you won’t see in Huntington Park or South Gate. The ambient particulate here is genuinely different. We strip failed sealant, clean the joint surface with Nikro equipment, and apply fresh mastic rated for high-particulate environments. A full system mastic reseal in Florence-Graham runs $350-$650 for a typical single-family home.
Flex Duct Repair
Original flex duct from the 1950s-60s has brittle, sagging insulation that detaches from collars, creating massive air leakage pathways. In Florence-Graham’s older duplexes and apartment buildings, we see this constantly. We replace damaged flex runs with new insulated duct, secure with proper mechanical fasteners, and seal with mastic - not duct tape. Flex duct repair in Florence-Graham typically costs $180-$340 per run.
Duct Insulation
Florence-Graham sits far enough inland that it gets little marine air flushing, and LA Basin temperature inversions trap heat at low altitudes. Uninsulated or degraded ductwork in your attic is essentially running through a convection oven. We install proper duct insulation to keep conditioned air cold in summer and warm in winter. Duct insulation in Florence-Graham runs $400-$800 depending on linear footage.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Florence-Graham
We carry parts and materials from Honeywell, Aprilaire, and Nikro - the same brands serious HVAC contractors specify. For Florence-Graham customers, this means we don’t have to order parts and make you wait. Our trucks are stocked for the specific failures we see in this market: high-temperature mastic for grease-degraded seals, 18-gauge galvanized patches for original metal trunks, and proper flex duct collars for 1960s retrofits. Most repairs are done same-day because we’ve already got what we need.
Common Duct Repair & Sealing Problems We See in Florence-Graham Homes
- Industrial contamination degrading seals. Florence-Graham’s position adjacent to Vernon means meatpacking grease and chemical particulate accumulate in duct systems at rates that dwarf nearby residential communities. This contamination breaks down mastic seals from the outside in, causing leaks that decrease system efficiency by 20-30%.
- Brittle original flex duct failing at collars. The 1950s-60s flex duct in Florence-Graham’s older housing stock has insulation that has hardened and separated from its wire helix. Air pours out into attics and crawl spaces instead of reaching your rooms.
- DIY duct tape patches failing repeatedly. Property owners in unincorporated zones often patch leaks with standard duct tape, which dries and fails within months. We see the same addresses every six months until someone calls us to do it properly with mastic and mechanical fasteners.
- County code enforcement gaps in multi-unit buildings. Because Florence-Graham is unincorporated LA County rather than City of LA, some older rental properties fall under county code enforcement rather than city inspectors. Duct systems in these buildings can go uninspected for longer periods, and technicians frequently find ductwork that has been patched rather than replaced since original construction.
Pricing for Duct Repair & Sealing in Florence-Graham, CA
We’re upfront about pricing because we’ve been burned by bait-and-switch operators too, and we refuse to operate that way.
| Service | Typical Range in Florence-Graham |
|---|---|
| Single leak patch (metal or flex) | $180-$280 |
| Metal duct repair with patch and mastic | $280-$550 |
| Flex duct replacement (per run) | $180-$340 |
| Full system mastic reseal | $350-$650 |
| Duct insulation (typical single-family) | $400-$800 |
What moves you within these ranges: accessibility (crawl space vs. accessible attic), extent of contamination damage, and whether we’re matching to existing 1950s-60s dimensions or upgrading. We inspect with a camera before quoting, so you see what we see. Estimates are free. Call (855) 401-6006.
Standing offers: $50 off any repair over $250. Free second opinion on any written estimate. Permanent 5% senior and veteran discount.
We Also Serve Cities Near Florence-Graham
Our Duct Repair & Sealing in Florence-Graham team also covers Huntington Park, Walnut Park, Willowbrook, and South Gate. Same trucks, same technicians, same upfront pricing.
Serving Florence-Graham, CA - Our Local Coverage Area
We’re based in the Florence-Graham 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 - Duct Repair & Sealing in Florence-Graham
Florence-Graham sits directly adjacent to Vernon, one of the most concentrated industrial municipalities in the United States, packed with meatpacking plants, food processing facilities, and chemical manufacturers. This drives ambient particulate and grease-laden airborne contamination into home HVAC systems at rates that dwarf those found in residential communities even a few miles away. Your ducts aren’t just leaking air - they’re pulling in industrial contamination that degrades seals and pollutes indoor air. Call (855) 401-6006 for a camera inspection and free estimate.
You’ll feel uneven heating or cooling between rooms, see dust streaking near ceiling vents, or notice your HVAC system running longer than it used to. Gravel tape and early mastic from the 1950s has a 60-70 year service life at best, and Florence-Graham’s industrial particulate exposure accelerates failure. We camera-inspect every system before quoting, so you’ll see exactly where the leaks are. Call (855) 401-6006 to schedule - estimates are free.
Yes, in most cases we can replace damaged sections without tearing out the entire system. Original 1960s flex duct in Florence-Graham has typically brittle insulation that detaches from collars, but the routing and plenum connections are often still sound. We replace failed runs with new insulated flex, secure with mechanical fasteners and mastic sealant, and preserve what still works. A typical 1960s flex duct repair runs $180-$340 per run. Call (855) 401-6006 for an exact quote on your system.
Yes. We regularly work on multi-unit buildings in Florence-Graham’s unincorporated zones where county rather than city inspectors have jurisdiction. We document our work with before-and-after camera footage, which satisfies most county compliance requests, and we repair to standards that exceed minimum code. If you’re a property owner or manager dealing with long-deferred duct maintenance, we can assess the full scope and prioritize repairs by urgency. Call (855) 401-6006 - we also offer free second opinions on any written estimate you’ve already received.
Sealing leaks in a duct system that’s never been cleaned is like fixing holes in a dirty filter - you’ll stop the leaks, but you’re still circulating decades of accumulated particulate. In Florence-Graham, that particulate includes industrial soot and grease that you won’t find in coastal communities. We typically recommend camera inspection first to assess both contamination level and leak locations. Often the right approach is cleaning followed by sealing, which we can complete in a single visit. Call (855) 401-6006 and we’ll walk you through what your specific system needs.
Ready to stop patching and fix it right? Call Bellows Air Duct & Vent Co. of California at (855) 401-6006 for a free estimate on duct repair and sealing in Florence-Graham. We’ll show you the camera footage, give you one honest price before we start, and back our work with the 90-Day Done Right Promise - in writing, no arguing.
Written by Roger Castañeda, Owner at Bellows Air Duct & Vent Co. of California, serving Florence-Graham since 1984.