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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After
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Before
AfterFast, Reliable Duct Sealing Across Fulton
Duct sealing in Fulton typically runs $800 – $2,400 for a whole-home system depending on accessibility and leak severity, and most jobs are completed in a single visit. We dispatch crews to Fulton from our Washington, DC coordination office, so we’re familiar with Howard County’s permitting requirements and the specific duct configurations common in newer homes here.
We’ve worked in enough Maple Lawn homes and along Route 216 to know what Fulton’s building stock looks like from the inside. Large multi-zone systems, long duct runs through finished basements, and the occasional surprise: original ductwork that still leaks because it was never properly sealed after construction. If you’re noticing uneven temperatures between rooms, dust that returns quickly after cleaning, or utility bills that climb without explanation, the problem is often air escaping through gaps in your duct system before it ever reaches your vents. Call us at (361) 326-5060 for a free inspection and written estimate.
Why Hollis Air Duct Cleaning Is Fulton’s Preferred Duct Sealing Company
Fulton homeowners don’t hire us because we’re the cheapest option. They hire us because we show up inside the window, price the job in writing before touching anything, and leave the site clean. That’s The Garrison Standard, and it’s how we’ve operated since 2004.
Our technicians are background-checked and uniformed, and you’ll know who’s arriving before they knock. Our phones are answered by a live person 24 hours a day, seven days a week, no voicemail loops or callback queues. Every duct sealing job we complete in Fulton carries our 365-Day Done Right Promise in writing: if the seal fails or the leak returns within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no fine print.
We also handle Air Duct Cleaning in Fulton and Dryer Vent Cleaning in Fulton, so if your inspection reveals multiple issues, one crew can address them without coordinating separate appointments.
Air Duct Sealing in Fulton
Air Duct Sealing in Fulton addresses a problem that’s especially common in this area’s newer construction: duct systems that were built tight but never sealed tight. In the luxury homes rising throughout Howard County’s green corridor, we’ve found that builders often install high-efficiency HVAC equipment connected to ductwork with dozens of small leaks at joints, seams, and register boots. The equipment works hard, but conditioned air escapes into attics, crawl spaces, and wall cavities before reaching your rooms.
Our process starts with a pressure test to measure exactly how much air your system is losing. We then seal accessible leaks using duct sealing mastic, a thick, durable compound that bonds to metal and flex duct alike, or with mechanical fasteners where appropriate. For homes with extensive leakage or ducts buried behind finished surfaces, we may recommend aerosol-based duct sealing, which sends sealant particles through the pressurized system to find and close leaks from the inside.
When Sealing Beats Replacement
Not every leaky duct needs to be torn out. In Fulton’s 10 – 20 year old homes, the ductwork itself is often structurally sound; it simply was never properly sealed during construction. A targeted sealing job restores efficiency without the cost and disruption of full replacement.
Signs Your System Is Leaking
Watch for rooms that never reach the thermostat setting, dust accumulation near vent edges, or a whistling sound when the blower runs. In Fulton’s humid summers, leaking return ducts can also pull musty attic air into your living space, straining your dehumidifier and encouraging microbial growth.
Duct Sealing Services in Fulton
Duct Sealing Services in Fulton from Hollis cover everything from single-register repairs to whole-system sealing for 6,000 square foot homes with four or more zones. We use professional-grade equipment from Rotobrush and Nikro, the same negative-air and rotary brush systems commercial crews rely on, adapted for residential precision work.
Every job begins with a written price. We inspect your system, identify the leak points, and give you a flat rate for the sealing work before we start. That price does not change when the technician is in your home. No per-vent add-ons, no “we found another problem” surprises.
New Construction Remediation
Fulton’s building boom left many homes with ductwork full of construction debris and joints that were never sealed to completion. We call this commissioning work: treating a new system as if it were being finished for the first time, because in many cases, it essentially is.
Energy Audit Follow-Up
If you’ve already had a home energy audit that flagged duct leakage, bring us the report. We’ll align our sealing scope with the auditor’s findings and provide documentation of the improvement for any utility rebate applications.
What happens when you call
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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 Fulton
Our equipment roster includes rotary brush systems from Rotobrush, negative-air machines from Nikro, and filtration products from Honeywell, Aprilaire, and Guardsman. For Fulton homeowners with high-end HVAC installations, we stock compatible sealing materials and fasteners for brands commonly found in local new construction, including the tight-tolerance fittings used in multi-zone systems. That means faster turnaround and no waiting for special-order parts. We also carry Abatement Technologies HEPA filtration equipment to protect your home’s air quality during the sealing process itself, a step many competitors skip.
Common Duct Sealing Problems We See in Fulton Homes
- Construction-era leakage in Maple Lawn and new developments. Homes built during Fulton’s rapid growth often have duct joints that were taped but never mastic-sealed. The tape dries and fails within five to ten years, leaving gaps that bleed conditioned air into unfinished spaces.
- Long duct runs with multiple junctions. Fulton’s larger homes frequently have supply lines running fifty feet or more from the air handler, with half a dozen turns and connections. Each junction is a potential leak point, and cumulative small losses add up to significant efficiency penalties.
- Humidity-driven duct degradation. Our humid summers and cold winters create expansion and contraction cycles in metal ductwork. Over time, this movement loosens connections, especially in attics where temperature swings are most extreme.
- Return duct leaks pulling unconditioned air. In homes with basement or attic return plenums, gaps allow the system to draw in dusty, humid, or mold-affected air rather than recirculating clean indoor air. This strains equipment and degrades air quality simultaneously.
Pricing for Duct Sealing in Fulton, MD
Most whole-home duct sealing jobs in Fulton fall between $800 and $2,400. Single-zone homes with accessible ductwork and moderate leakage typically land in the $800 – $1,400 range. Larger multi-zone systems, homes with ducts buried behind finished ceilings, or jobs requiring aerosol sealing can run $1,800 – $2,400.
What moves the price: the number of zones, how much of the ductwork is accessible, whether we can reach leaks from the basement and attic or need to create access points, and whether we’re addressing a straightforward sealing job or also removing construction debris that complicates the work. We do not charge per vent or per linear foot. One flat price per system, agreed in writing, before any work begins.
Estimates are free. Call (361) 326-5060 to schedule an inspection at your Fulton home.
We Also Serve Cities Near Fulton
Our crews regularly work in Fulton and the surrounding Howard County area, including Columbia, Savage, Ellicott City, and Jessup. If you’re near the border of our service area, call and we’ll confirm coverage. Our Duct Sealing team coordinates dispatch from our Washington, DC office to reach these communities efficiently.
Serving Fulton, MD - Our Local Coverage Area
We’re based in the Fulton 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 Fulton
Whole-home duct sealing in Fulton typically costs $800 – $2,400, with most single-zone homes falling in the $800 – $1,400 range. The exact price depends on system size, accessibility, and whether aerosol sealing is needed. Call (361) 326-5060 for a free written estimate.
Low quotes often use per-vent pricing that balloons once the technician arrives, or they skip the pressure test that verifies results. We give one flat price per system in writing before starting, and we test after sealing to prove the improvement. If a quote seems too low, ask whether it includes post-seal verification.
We pressure-test your system before and after sealing, and we show you the numbers. You’ll see exactly how much leakage we eliminated. We also photograph accessible work areas and provide a written summary with your invoice. Our 365-Day Done Right Promise means if leaks recur, we return at no charge.
Properly sealed ductwork should last the life of the system, but Fulton’s expansion-contraction cycles from humid summers to cold winters can loosen connections over ten to fifteen years. We recommend inspection every five years, or sooner if you notice uneven heating, rising bills, or dust patterns around vents.
We answer calls live 24 hours a day, seven days a week, and we schedule urgent appointments as quickly as possible. True duct sealing emergencies are rare, but if a disconnected duct is flooding your home with attic air or creating a safety issue, we’ll prioritize getting a crew to your Fulton home.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Fulton and Howard County since 2004.