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
Before
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Before
AfterFast, Reliable Duct Sealing Across Ardmore
Duct sealing in Ardmore typically runs $450 – $1,200 for a whole-home job, depending on whether we’re working with original 1920s round sheet-metal trunk lines or the shorter post-war systems in Ardmore Park. Most Ardmore homeowners call us after they’ve had their ducts cleaned once or twice and still feel uneven temperatures or see dust settling fast after we’ve left. That’s usually a pressure leak, not a cleanliness problem. Our crews dispatch from the Philadelphia office and carry mastic, mesh, and collar sealants sized for both the stone colonials along Lancaster Avenue and the capes off Wynnewood Road. If you’re in Ardmore and suspect your conditioned air is escaping before it reaches your rooms, call (361) 326-5060. We’ll scope it and price it in writing before any work starts.
Why Hollis Air Duct Cleaning Is Ardmore’s Preferred Duct Sealing Company
We’ve been working Main Line homes since 2004, and Ardmore’s mix of building eras keeps our crews sharp. The Garrison Standard requires us to arrive inside the quoted window, price in writing, and leave the site clean – no exceptions. Our Duct Sealing technicians are background-checked and uniformed; you know who’s walking in before they ring the bell.
Ardmore homeowners specifically tell us they chose Hollis because the price we write down is the price they pay. No per-vent add-ons, no “we found another problem” surprises once the van is in the driveway. The 365-Day Done Right Promise covers every sealing job in writing: if a joint fails or a collar loosens within a year, we come back and make it right at no charge, including a free second visit.
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 Sealing Services in Ardmore
Duct Sealing Services in Ardmore are most often repair work, not routine maintenance. In this market, we seal because original gravity-furnace ductwork has shifted, crushed, or disconnected over decades – and because the floor-level return chutes in Ardmore Park capes create air paths that standard register taping won’t close. A typical whole-home duct sealing job in Ardmore runs $450 – $1,200. Single-register repairs or collar sealing start around $180 – $340.
Gravity-Furnace Trunk and Branch Repair
Pre-1930 stone colonials and twins near Lancaster Avenue often carry original round sheet-metal ducts tied to converted coal furnaces. We seal these with mastic and fiberglass mesh, not hardware-store tape, because temperature swings across stone-and-stucco walls flex the metal seams. Before we seal, we camera-inspect to confirm the trunk isn’t crushed and the boot hasn’t pulled free.
Floor-Return Chute Sealing
In Ardmore Park’s 1940s – 60s capes, the return path is frequently the original cold-air chute set into the floor. We seal the pit walls, the collar, and the register boot as a system. Standard roto-brush kits can’t reach the debris settled at the bottom, so we pull the register and hand-clean before we seal.
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.
Duct Insulation in Ardmore
Duct Insulation in Ardmore addresses a problem most homeowners don’t notice until winter: conditioned air bleeding through thin metal walls into unconditioned basements, crawl spaces, or behind plaster. In Ardmore’s older homes, ducts often run through exterior walls with no wrap at all. A typical duct insulation job in Ardmore runs $600 – $1,800 depending on linear footage and access. We use professional-grade wraps from Honeywell and Aprilaire, sized for the 6-inch and 8-inch round stock common in Main Line homes.
Basement and Crawl-Space Runs
Original sheet-metal trunk lines in Ardmore basements lose efficiency through conduction, not just leaks. We wrap with foil-faced fiberglass or closed-cell sleeve insulation, sealed at seams with mastic. This is especially effective on the long east-west trunks feeding second-floor bedrooms in stone colonials.
Attic and Knee-Wall Ducts
Post-war capes in Ardmore Park sometimes have flex duct or modified trunk lines in attic spaces. We inspect for compression at bends, then insulate and seal as a single operation. The goal is to deliver the same temperature air to the register that left the furnace.
Trusted Brands We Service in Ardmore
Our Ardmore crews carry sealing and insulation products from Honeywell, Aprilaire, and Abatement Technologies – the same filtration and wrap materials commercial crews use on institutional jobs. We don’t order parts from a catalog while you wait. Our Philadelphia office stocks collar sealants, mastic compounds, and insulation sleeves sized for the 6-inch, 7-inch, and 8-inch round ductwork found in Main Line homes, so most Ardmore jobs finish in one visit without a parts delay.
Common Duct Sealing Problems We See in Ardmore Homes
- Crushed branch runs behind plaster walls. In 1920s stone colonials off Lancaster Avenue, we’ve found second-floor branch lines flattened by decades of wall settlement or renovation work. The register blows weakly, so homeowners crank the thermostat. Sealing alone won’t fix it; we restore the duct shape, then seal.
- Disconnected boots at the trunk collar. Original round sheet-metal systems rely on friction and a few screws. Vibration from a modern blower motor gradually works boots loose. We find these with camera inspection, reconnect with mechanical fasteners, then seal with mastic and mesh.
- Floor-return chutes treated as standard grilles. Ardmore Park capes have gravity-furnace cold-air chutes in the floor, not wall returns. Taping the register face ignores the real leak path. We pull the register, clean the pit, and seal the chute walls and collar.
- Wrong sealant for the substrate. Standard flex-duct tape fails on pre-1930 metal seams that expand and contract with temperature swings across stone walls. We use mastic and fiberglass mesh, rated for the movement and the humidity Ardmore’s mature tree canopy traps against older homes.
Pricing for Duct Sealing in Ardmore, PA
Whole-home duct sealing in Ardmore typically costs $450 – $1,200. Single-register or collar repairs run $180 – $340. Duct insulation, when needed, adds $600 – $1,800 depending on how many linear feet we’re wrapping. What moves the number: access (crawl space vs. open basement), whether we need to pull and reseat floor registers, and if camera inspection reveals crushed or disconnected runs that need repair before sealing.
We write the price down before any work starts. One flat price per system. No per-vent pricing, no “we found something else” add-ons once the technician is inside. If you’re in Ardmore, call (361) 326-5060 for a free estimate. We’ll scope the job, explain what we found, and give you a written number you can compare.
We Also Serve Cities Near Ardmore
Our crews work Ardmore regularly and also handle duct sealing calls in Narberth, Bryn Mawr, Merion Station, and Bala Cynwyd. The same Garrison Standard, the same written pricing, the same 365-Day Done Right Promise applies in every township.
Serving Ardmore, PA - Our Local Coverage Area
We’re based in the Ardmore 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 Ardmore
Yes. We pull the floor register, clean the gravity-furnace cold-air chute by hand, and seal the pit walls, collar, and boot as a system. Standard register taping won’t close the real leak path in these original floor returns. Call (361) 326-5060 if you’re in Ardmore Park and want us to check yours.
Yes. We inspect first with a camera, then clean under negative pressure with HEPA filtration before we seal any joint. On pre-1930 round sheet-metal systems, we use mastic and fiberglass mesh, not tape, because NADCA guidelines and Ardmore’s temperature swings both demand a flexible, mechanical seal.
Because the dust keeps coming back through gaps you can’t see. On a two-story 1920s stone colonial just off Lancaster Avenue in Ardmore, we pulled the original round sheet-metal trunk and found two crushed branch runs and a disconnected boot feeding a second-floor bedroom. After source removal under negative pressure with HEPA filtration and agitation tools, we sealed the joints and the boot with mastic and mesh, then camera-inspected the trunk to confirm the collar was tight before we buttoned the floor register back down. Cleaning removed the debris; sealing fixed the pressure leak that was pulling new debris in.
Sometimes. If your ducts run through an unconditioned basement, crawl space, or exterior wall cavity, sealing stops air loss but insulation stops temperature loss. We inspect both during our estimate and tell you which matters more for your specific layout. In Ardmore’s stone colonials, we often recommend both.
It can. The township line running down Lancaster Avenue means some Ardmore jobs fall under Lower Merion codes, others under Haverford Township. We document and dispose of debris according to the applicable township requirements, a split that changes paperwork mid-route for crews working both sides of the avenue. You don’t need to know which side you’re on; we handle that when we schedule.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Ardmore and the Main Line since 2004.