Fast, Reliable Duct Repair & Sealing Across Landover
Duct repair and sealing in Landover typically costs $180–$650 depending on whether you’re dealing with disconnected flex ducts, deteriorating fiberglass duct board, or full section replacement. Most Landover jobs are completed same-day, and we carry the materials to fix 1970s-era systems on the spot. Call (855) 301-6549 for a free estimate.
We’ve been working in Landover’s 20784 ZIP code for 14 years, and there’s no duct problem we haven’t seen in these mid-century garden apartments and townhomes. Robert Garcia handles every job personally as lead technician — you’ll get the owner on your property, not a subcontracted crew. From Brightseat Road to the communities near Landover Mall, we know the fiberglass duct board, the corroded flex-duct collars, and the humidity-driven mold patterns that define this market. Our Duct Repair & Sealing team arrives with Rotobrush and Nikro equipment plus mastic sealant and replacement flex duct in the truck.
Why Apex Air Duct Cleaning Maryland Is Landover’s Preferred Duct Repair & Sealing Company
Our reputation in Landover is built on showing up and fixing what others patch. We’ve earned 254 verified reviews averaging 4.7 stars, and a significant share come from repeat calls in Prince George’s County — property managers who tried the coupon guys first, then called Robert when the “repair” failed within a season.
Response time to Landover is typically same-day or next-morning. We’re based in Baltimore and route regularly through the US-50 corridor, which means we’re not guessing about your building type when we arrive. We know which complexes off Brightseat Road have the original 1970s fiberglass duct board, which townhomes near the I-495 interchange deal with salt-corroded hardware, and why a standard metal-duct repair approach won’t work on your system.
That local knowledge saves time and money. We don’t run back to the shop for parts we should have brought. We don’t recommend sealing on duct board that’s too degraded to hold mastic. And we don’t leave until we’ve tested static pressure and temperature split — because in Landover’s humid Coastal Plain climate, a half-sealed system just breeds mold behind your walls.
Our Duct Repair & Sealing Services in Landover
Duct Sealing
Landover’s aging housing stock loses 20–30% of conditioned air through leaks before it reaches the vents. In garden apartments off Brightseat Road, we regularly find supply plenums pulling attic air through gaps you can’t see without a borescope. Our sealing process starts with pressure testing to locate leaks, then we apply mastic sealant — not duct tape — at every joint, penetration, and connection point. For metal duct systems, we use UL-181 rated foil tape as a backup, but mastic is the primary seal. In properties within a half-mile of the US-50 and I-495 interchange, we pay special attention to return plenums caked with road dust; those fine particulates degrade tape adhesive and accelerate collar corrosion.
Flex Duct Repair
Flex duct is the weak link in most Landover townhomes. The plastic inner liner cracks, the fiberglass insulation compresses, and the metal collars corrode — especially in units near the freight corridor where salt-laden air accelerates rust. At a garden apartment complex off Brightseat Road near US-50, we sealed a 1970s flex-duct system where salt-laden coastal air had corroded the metal collars and straps, causing multiple disconnections. We replaced the rotted flex with insulated duct, applied mastic sealant at every joint, and installed heavy-gauge metal ties. The resident reported her cooling bills dropped $35 that first month. We stock R-6 and R-8 flex duct, heavy-gauge straps, and corrosion-resistant collars on every truck.
Metal Duct Repair
When we find intact galvanized steel ductwork in Landover, it’s usually in later additions or partial replacements. We repair separated seams with drive cleats and mastic, replace rusted sections with 26-gauge galvanized pipe, and reinforce sagging runs with proper supports. The real challenge in 20784 isn’t the metal itself — it’s the transitions where metal meets flex or fiberglass duct board. Those hybrid connections were often slapped together by original builders and have vibrated loose over 40+ years of HVAC cycling. Robert rebuilds them with proper start collars, reducers, and sealed takeoffs.
Mastic Sealant Application
Mastic is our standard for Landover, not an upsell. Fiberglass duct board can’t be sealed with tape alone — the porous surface won’t hold adhesive, and any vibration from repair work releases friable fibers into the airstream. We brush on water-based mastic at 1/8-inch thickness, forcing it into the pores of aged duct board and over every joint. In Landover’s humid climate, this encapsulation step is critical: unsealed fiberglass that’s been disturbed during repair will reactivate mold colonies within 90 days. We’ve seen it. We don’t let it happen on our jobs.
Duct Insulation
Condensation on ductwork is a summer constant in Landover, where humidity stays high from May through September and HVAC systems run almost continuously. We replace degraded fiberglass insulation with formaldehyde-free duct wrap, sealed with vapor-barrier mastic. In crawlspace and attic runs common in 20784 garden apartments, proper insulation prevents the “rain” inside duct board that leads to structural collapse and mold blooms.
What happens when you call
- 1
A real person answersNo phone trees — you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Landover
We work with Honeywell and Aprilaire air quality components when duct repairs require integration with whole-home filtration or humidity control — common requests in Landover’s moisture-challenged environment. Our containment and negative-air setups use Abatement Technologies equipment to prevent cross-contamination during repairs, especially critical in multifamily buildings where one unit’s ductwork connects to common plenums. For air sanitizing after major repairs, we apply Guardsman treatments where appropriate. We stock replacement parts and materials locally, so Landover customers aren’t waiting on shipped components while their AC struggles through another humid week.
Common Duct Repair & Sealing Problems We See in Landover Homes
- Fiberglass duct board liners disintegrate into friable dust. In 20784’s 1960s–1980s garden apartments, we open return plenums and find the internal liner has turned to powder. Any repair vibration — even a thorough cleaning — sends those fibers back into living spaces. We encapsulate with mastic or recommend section replacement.
- Salt-corroded metal collars and straps fail at flex-duct connections. Properties within a half-mile of the US-50/I-495 freight corridor see measurably faster corrosion. Technicians working this area routinely find filters and return plenums caked with fine road dust and diesel particulates; the same particulates accelerate hardware decay.
- Persistent coastal humidity reactivates mold colonies in repaired fiberglass duct board within 90 days. Landover sits in Maryland’s humid Coastal Plain, within the drainage basin of the Anacostia and Patuxent watersheds. Without mastic encapsulation or full replacement, “repaired” duct board becomes a mold incubator by the end of the cooling season.
- Original flex-duct extensions have never been replaced and have compressed to R-2 or less effective insulation. The plastic vapor barrier cracks, the fiberglass sags, and the duct becomes a thermal liability. We see this in nearly every 1970s Landover townhome with original HVAC.
Pricing for Duct Repair & Sealing in Landover, MD
| Service | Typical Range in Landover |
|---|---|
| Basic duct sealing (mastic, up to 10 joints) | $180 – $320 |
| Flex duct section replacement (per run) | $220 – $380 |
| Fiberglass duct board repair with encapsulation | $280 – $450 |
| Metal duct section replacement with sealing | $340 – $520 |
| Full duct insulation replacement (per system) | $480 – $650 |
What moves you within these ranges: accessibility (crawlspace vs. basement), material type (flex is faster than metal), and whether we’re working around existing HVAC components. Multifamily buildings in Landover often have limited access panels, which adds labor. We quote upfront after inspection — no open-ended billing. Call (855) 301-6549 for a free estimate; we’ll pressure-test your system and show you exactly where the leaks are before you decide.
We Also Serve Cities Near Landover
Our service radius covers East Riverdale, College Park, Bladensburg, and Cheverly — all dealing with similar mid-century housing stock and Coastal Plain humidity challenges. Each area gets Robert Garcia as lead technician, same as Landover. Route us through on your property manager’s schedule; we’ll batch adjacent buildings for efficiency.
Serving Landover, MD — Our Local Coverage Area
We’re based in the Landover 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 Landover
Diesel particulates and fine road dust from the US-50/I-495 freight corridor infiltrate return plenums and overwhelm standard filters. We find filters and return collars caked with black dust even in units with recent maintenance. Sealing the return plenum and upgrading to MERV-11 or better filtration helps, but the first step is fixing the leaks that pull unfiltered air from wall cavities and attic spaces. Call (855) 301-6549 and we’ll pressure-test to find the infiltration points.
Only if encapsulated with mastic sealant or replaced entirely. Raw fiberglass duct board exposed during repair will reactivate mold within 90 days in Landover’s persistent humidity. We don’t do partial fixes on degraded liner — we encapsulate or we replace. Robert evaluates the board’s structural integrity on every job and gives you a straight recommendation.
Original metal collars and straps have corroded from decades of salt-laden coastal air, and the plastic flex liner has stiffened and cracked. Tape repairs fail because the surface is compromised. We replace the flex with new insulated duct, install heavy-gauge metal ties, and seal with mastic — a permanent fix, not another temporary patch.
Original systems in 20784’s 1960s–1980s buildings should be inspected every 3–5 years, with sealing touch-ups as needed. If you’ve never had professional duct service, start with a full inspection — these systems often go 40–60 years without proper maintenance. After our initial repair and seal, we’ll tell you honestly whether you’re on a 3-year or 5-year cycle based on your specific materials and HVAC usage.
Yes — Rotobrush systems are part of our pre-repair cleaning protocol to remove debris before we seal or replace sections. We also use Nikro equipment for heavier buildup and Abatement Technologies containment to protect adjacent units during multifamily work. The cleaning happens first; then Robert handles the repair and sealing personally.
Ready to fix your ductwork? Call (855) 301-6549 for a free estimate in Landover. Robert Garcia handles every job personally — 14 years, 254 reviews, and no subcontracted crews.
Written by Robert Garcia, Owner at Apex Air Duct Cleaning Maryland, serving Landover and the Baltimore metro area since 2010.