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 Edgewood
Duct sealing in Edgewood typically runs $450 – $1,200 for a whole-home job, depending on how many runs need attention and whether we’re working with original galvanized trunk lines or newer flex duct. Most Edgewood homes need a combination of mastic sealing at metal seams and proper patching where rodents or age have compromised the ductwork. Call (361) 326-5060 for a written estimate before any work starts.
We’ve been sending crews to Edgewood from our Baltimore office since Hollis Air Duct Cleaning joined the Garrison Partners family in 2004. We know the area: the post-WWII duplexes off Willoughby Beach Road, the 1970s ranches near Edgewood Road, the subdivisions that went up between Route 40 and the Bush River in the 1980s and 90s. Each era of construction has its own duct problems, and we don’t guess. Our Duct Sealing team arrives with a written price, background-checked and uniformed, and we don’t leave until the job is done by The Garrison Code.
Why Hollis Air Duct Cleaning Is Edgewood’s Preferred Duct Sealing Company
Edgewood homeowners call us back because we show up inside the window and price the job in writing before we touch anything. No estimate that balloons once we’re in the crawlspace. The 365-Day Done Right Promise means if a seal fails or a patch doesn’t hold, we return and make it right at no charge, including a free second visit. That’s not a slogan; it’s printed on every Hollis invoice.
Our technicians carry professional-grade equipment from Nikro and Abatement Technologies, the same negative-air machines and HEPA filtration systems commercial crews use. We explain what we’re doing and why, in plain terms. And when you call (361) 326-5060, a live person answers, 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday for a scheduling answer.
Duct Insulation in Edgewood
Duct Insulation in Edgewood is often the missing piece after sealing is complete, especially in homes with crawlspace or attic runs where the original fiberglass wrap has compressed, gotten wet, or been torn apart by rodents. Edgewood’s humidity near Bush River means uninsulated or degraded duct wrap lets warm, moist air hit cold metal in summer, creating condensation that drips back into the system and breeds mildew. Proper insulation after sealing keeps the air at temperature from the handler to the register and stops that cycle.
A typical duct insulation job in Edgewood runs $300 – $800, depending on linear feet and accessibility. Homes with crawlspace trunk lines, common in the post-WWII duplex stock, usually sit at the higher end because the work is slower and the existing wrap is often saturated.
When Insulation Beats Replacement
We don’t tear out intact metal duct just to sell new flex. If the galvanized trunk is structurally sound but the wrap is compromised, we clean the surface, seal the seams, and install new insulation with a proper vapor barrier. That’s the disciplined approach, and it’s what The Garrison Standard requires.
Vapor Barrier Integrity
Edgewood’s tidal air will find any gap in the vapor barrier. We tape every seam and secure the wrap so it doesn’t sag or tear. A sagging wrap collects condensation; a torn wrap lets humidity straight to the metal. Both fail within a season here.
HVAC Duct Sealing in Edgewood
HVAC Duct Sealing in Edgewood addresses the leaks that force your system to work harder than it should, and in this market, those leaks are often compounded by moisture damage and rodent intrusion. A typical whole-home sealing job in Edgewood runs $450 – $1,200. Single-run repairs or spot sealing at accessible joints start around $200 – $350. We write the price down before we start, and it doesn’t move at the door.
The work involves pressurized testing to find leaks, then sealing with mastic at metal seams, proper patching at damaged flex connections, and mechanical fastening where ducts have separated from collars or plenums. We don’t skip steps because a step is hard to reach.
Pressure Testing Before Sealing
We run a duct blaster or static pressure test to quantify leakage before we seal. That number tells us whether we’re looking at a few bad joints or a system-wide problem. It also gives us a baseline to test against when we’re done. Homeowners see the before and after in inches of water column.
Mastic vs. Tape
We use mastic, not foil tape, at metal seams. Tape fails in Edgewood’s humidity; the adhesive degrades and the seal opens. Mastic remains flexible and bonds to galvanized steel even with slight surface oxidation. It’s slower to apply and messier to work with, which is why cheaper crews skip it. We don’t.
Trusted Brands We Service in Edgewood
Our equipment roster includes Nikro negative-air machines for source removal, Abatement Technologies HEPA filtration systems, and Honeywell and Aprilaire filtration products for the air handler side. We stock parts and materials for Edgewood’s common duct configurations, including mastic, mechanical fasteners, and insulation wrap sized for the smaller-diameter galvanized runs found in older Edgewood homes. That means faster turnaround and fewer return trips. When we seal a system, we can also upgrade your filter housing or recommend a properly sized Honeywell or Aprilaire media filter to protect the work we’ve done.
Common Duct Sealing Problems We See in Edgewood Homes
- Moisture-damaged galvanized seams in post-WWII duplexes. The original trunk lines in Edgewood’s military-conversion housing weren’t designed for decades of humid mid-Atlantic air. Rust opens gaps at longitudinal seams, and sealing over rust without addressing the underlying moisture source just traps the problem.
- Rodent-chewed flex duct near wooded edges. Homes backing onto Aberdeen Proving Ground woods see regular mouse and squirrel intrusion. They chew through flex duct liner to nest in the insulation, and simply taping the hole doesn’t stop them from returning.
- Collapsed inner liners in 1970s – 90s flex systems. Early flex duct installed in Edgewood’s subdivision era used thinner plastic liners that sag and collapse over time, choking airflow. Sealing the outside jacket without inspecting the inner liner wastes money; the duct still doesn’t move air.
- Disconnected collars at the plenum in crawlspaces. Edgewood’s high water table means damp crawlspaces, and damp crawlspaces mean corroded sheet-metal screws and separated duct connections. The air you’re paying to heat or cool leaks into the crawlspace before it reaches the house.
Pricing for Duct Sealing in Edgewood, MD
Whole-home duct sealing in Edgewood typically costs $450 – $1,200. Spot repairs or single-run sealing run $200 – $350. Duct insulation added after sealing adds $300 – $800. What moves the price: accessibility (crawlspace vs. basement), linear footage of duct, whether source removal is needed before sealing, and the condition of existing fittings.
We don’t quote per-vent or sell teaser coupons. The price is one flat price per system, agreed in writing before work starts. No per-vent add-ons, no “while we’re here” surprises. Call (361) 326-5060 for a free estimate. We’ll inspect the system, show you what we find, and give you a written number you can count on.
We Also Serve Cities Near Edgewood
Hollis crews work throughout Harford and eastern Baltimore Counties, including Edgewood and nearby Abingdon, Kingsville, White Marsh, and Perry Hall. Scheduling and dispatch run from our Baltimore office, with local crews serving each community.
Serving Edgewood, MD - Our Local Coverage Area
We’re based in the Edgewood 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 Edgewood
Yes. Edgewood’s location on tidal water with relative humidity regularly above 70% creates condensation on cold duct surfaces, especially in summer when attic and crawlspace temperatures swing widely. That moisture, combined with dust and organic debris, supports microbial growth on galvanized and flex duct interiors. Call (361) 326-5060 for a camera inspection if you smell mustiness from your registers.
No, not if the smell comes from microbial growth or rodent debris inside the duct. Sealing over contaminated duct traps the odor source and often makes it worse as humidity continues behind the seal. We source-remove the contamination with agitation tools under negative pressure and HEPA filtration, then seal. That’s the sequence that actually clears the air.
Generally no. Fogging coats surfaces with a chemical layer but doesn’t remove the physical debris, rodent droppings, or microbial growth that causes persistent odors in Edgewood’s humid conditions. Source removal with mechanical agitation and negative-air extraction is what actually cleans the duct. Fogging is cheaper to sell and faster to apply, which is why less disciplined crews push it. We don’t.
Wooded edges near APG harbor dense mouse and squirrel populations that seek warmth in ductwork during fall and winter. They chew entry holes through flex duct and nest in the insulation. Sealing without screening the entry point or replacing chewed sections is temporary at best. We inspect for active intrusion, patch or replace damaged duct, and seal with rodent-resistant materials where appropriate.
For most Edgewood homes, MERV 8 – 11 after sealing is the right range. Higher isn’t always better; MERV 13 and above can restrict airflow on older systems with marginal blower capacity, common in Edgewood’s post-WWII and 1970s housing stock. After we seal your ducts and test static pressure, we can recommend the highest filtration level your system can handle without strain. Call (361) 326-5060 and we’ll size it properly.
Ready to stop losing conditioned air to your crawlspace or attic? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free, written estimate on duct sealing in Edgewood. We’ll show you what we find, price it before we start, and stand behind the work for a full year under our 365-Day Done Right Promise.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Edgewood and the greater Baltimore area since 2004.