Fast, Reliable Duct Repair & Sealing Across Temple Hills
Duct repair and sealing in Temple Hills, MD typically costs $180–$650 depending on whether you’re sealing accessible seams or replacing collapsed fiberglass duct board, and most jobs are completed in a single visit. We regularly work in the 20748 and 20757 ZIP codes, and our Duct Repair & Sealing crew can usually be on-site in Temple Hills within 24–48 hours of your call. If your rancher or split-level was built during the 1950s–1970s boom and you’re noticing weak airflow, musty odors, or rooms that won’t heat or cool evenly, the problem often starts in ducts that have never been touched since construction.
We’ve spent 14 years working in Prince George’s County, and Temple Hills presents a specific set of challenges you won’t find in newer suburbs. The clay soils, shallow crawl spaces, and original fiberglass duct board common to this area create a repair profile that’s distinct from what we see in Charles County or even higher-elevation parts of the DC metro. Robert Garcia, our owner and lead technician, handles every Temple Hills job personally — not a subcontracted crew learning your house on the fly. Call (855) 301-6549 for a free estimate and same-week scheduling.
Why Apex Air Duct Cleaning Maryland Is Temple Hills’s Preferred Duct Repair & Sealing Company
Our reputation in Temple Hills is built on showing up when we say we will and telling homeowners the truth about their ductwork — even when that means recommending a more involved repair than they expected. We’ve earned 254 verified reviews with a 4.7-star average across our service area, and a significant portion of those come from repeat customers in Prince George’s County who initially called us for duct cleaning and later needed repair work once we showed them what was actually inside their system.
Response time matters in Temple Hills, especially during summer humidity spikes when sweating ducts can push mold growth from a crawl-space problem into a whole-house air quality issue. We’re typically able to schedule Temple Hills appointments within one to two business days, and we carry the equipment to complete most sealing and repair jobs — including flex duct replacement and mastic application — in a single visit. Robert Garcia arrives with Rotobrush and Nikro extraction systems plus Abatement Technologies containment gear, so we’re prepared for the negative-pressure protocols that Temple Hills’s deteriorating fiberglass duct board often requires.
We know the local housing stock. The ranchers along Allentown Road, the split-levels in the Hillcrest neighborhood, the post-war developments near Silver Hill Road — we’ve worked in all of them. That familiarity means we can often diagnose your duct configuration before we even enter the crawl space, because we’ve seen how Prince George’s County builders of that era routed systems through unconditioned attics and shallow crawl spaces over clay.
Our Duct Repair & Sealing Services in Temple Hills
Duct Sealing
Most Temple Hills homes lose 20–30% of conditioned air through leaks at duct seams and joints, and in 50–70-year-old systems that percentage climbs higher. We seal accessible ductwork with mastic sealant — a brush-applied compound that remains flexible and creates a permanent bond at temperatures from -20°F to 350°F. For Temple Hills’s corroded metal duct seams and deteriorating fiberglass board connections, mastic outperforms foil tape, which degrades in humid crawl spaces within a few years. A typical duct sealing job in Temple Hills runs $180–$400 for a single system with accessible ductwork.
Flex Duct Repair
Flex duct became common in Temple Hills additions and retrofits from the 1970s onward, and after decades in hot attics or damp crawl spaces, the inner liner tears and the insulation compacts. We replace collapsed or damaged flex duct runs with new, properly sized flexible duct — never the “good enough” approach of taping over tears that restricts airflow and traps moisture. In Temple Hills’s shallow crawl spaces, proper flex duct support is critical; sagging creates low points where condensation pools. Flex duct repair or replacement in Temple Hills typically ranges from $220–$480 per run depending on length and accessibility.
Metal Duct Repair
The galvanized steel ducts original to many Temple Hills ranchers corrode from the inside out when condensation combines with household air contaminants, and from the outside in when ground moisture wicks through unvented crawl spaces. We repair isolated corrosion with patch panels and mastic, replace short damaged sections with matching gauge metal, and advise when a full section replacement makes more sense than repeated patching. Metal duct repair in Temple Hills generally runs $250–$550 for localized work; full section replacement in difficult crawl-space conditions can reach $650–$900.
Duct Insulation & Mastic Sealant Application
Uninsulated or degraded duct insulation in Temple Hills’s unconditioned spaces is an energy waste and a mold risk. We install foil-faced fiberglass insulation at R-6 or R-8 value on repaired ductwork, sealed with mastic at all seams. For homes with chronic condensation problems — common in Temple Hills’s clay-soil crawl spaces — we may recommend upgrading to closed-cell foam insulation on critical runs. Insulation work combined with sealing typically ranges from $320–$650 in Temple Hills, depending on linear footage and access difficulty.
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 Temple Hills
We maintain active authorization to work with Honeywell and Aprilaire air quality systems, and we deploy Abatement Technologies containment equipment on every Temple Hills job where fiberglass duct board degradation is present. This matters because disturbed fiberglass in a 1960s duct system can contaminate your entire home if not properly isolated and extracted. We don’t show up with a shop vac and hope for the best. For homeowners in Temple Hills who’ve invested in Honeywell or Aprilaire whole-home air purifiers, we coordinate duct repairs to preserve those systems’ performance — a split-level on Brinkley Road or a rancher near Allentown Road deserves that integration, not a generic fix that ignores your existing equipment.
Common Duct Repair & Sealing Problems We See in Temple Hills Homes
- Fiberglass duct board shedding particulate after 50+ years. The original duct board in Temple Hills’s 1950s–1970s homes has softened to the point where standard brush cleaning would release clouds of fiberglass into your living space. We use negative-pressure extraction with HEPA containment to address this safely.
- Corroded metal seams from ground moisture in unvented crawl spaces. Prince George’s County clay holds moisture against shallow crawl-space floors, and that humidity attacks galvanized steel from below. We find this constantly in Temple Hills ranchers — seams that looked fine from inside are rusted through underneath.
- Condensation-driven mold colonization in summer. When dew points climb into the mid-70s°F for weeks at a time, uninsulated attic and crawl-space ductwork in Temple Hills sweats on its interior surface. That moisture seeds mold that then circulates through every room your HVAC serves.
- Collapsed sections from physical degradation combined with humidity. On a recent job in the 20748 Hillcrest neighborhood, our crew found a 1960s split-level where the original fiberglass duct board had deteriorated in the crawl space over clay soil, causing collapsed sections. We sealed the compromised runs with mastic and replaced the worst sections with metal duct, restoring airflow and preventing future condensation.
Pricing for Duct Repair & Sealing in Temple Hills, MD
| Service | Typical Range in Temple Hills | What Affects Cost |
|---|---|---|
| Duct sealing with mastic (accessible seams) | $180–$400 | System size, number of seams, crawl space vs. attic access |
| Flex duct repair/replacement (per run) | $220–$480 | Length, diameter, accessibility, insulation grade |
| Metal duct repair (localized corrosion/seams) | $250–$550 | Extent of damage, gauge matching, location |
| Duct insulation + sealing combo | $320–$650 | Linear footage, R-value, access conditions |
| Full section replacement (metal or flex) | $650–$900 | Material type, labor in confined crawl spaces |
These ranges reflect actual Temple Hills jobs we’ve completed in the past 24 months. Costs run toward the higher end when we’re working in shallow, unvented crawl spaces over clay soil — the physical access is harder, and the moisture damage tends to be more extensive. We provide upfront, itemized estimates before any work begins, and we’ll show you photo documentation of what we find so you can make an informed repair-versus-replace decision. Call (855) 301-6549 for your free estimate.
We Also Serve Cities Near Temple Hills
Our duct repair and sealing crews work throughout southern Prince George’s County, including Hillcrest Heights, Marlow Heights, Fort Washington, and Silver Hill. These communities share Temple Hills’s post-war housing stock and clay-soil moisture challenges, and we apply the same owner-led, equipment-heavy approach to every job. Whether you’re in a 1950s rancher off Allentown Road or a split-level near the Marlow Heights shopping corridor, the diagnosis and repair protocol is similar — though we always inspect your specific system before recommending any work.
Serving Temple Hills, MD — Our Local Coverage Area
We’re based in the Temple Hills 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 Temple Hills
It depends on the degree of degradation. If the fiberglass duct board is intact but leaking at seams, we can seal it with mastic and extend its service life. If the board has softened and is shedding particulate — common in Temple Hills’s 1950s–1970s homes after decades of humidity exposure — replacement with metal duct is the safer long-term solution. We’ll inspect your system with a borescope camera and show you exactly what we’re seeing before you decide. Call (855) 301-6549 for a free evaluation.
Your ducts sweat because unconditioned air in your crawl space or attic is reaching the dew point against the cool metal or fiberglass surface. Temple Hills’s low elevation and clay soils trap ground moisture, and Prince George’s County summer dew points in the mid-70s°F push conditions past the condensation threshold for weeks at a time. Proper sealing plus insulation — typically R-6 or R-8 on crawl-space runs — breaks that thermal bridge and stops the sweating. Most ranchers near Allentown Road benefit from this combination. Call (855) 301-6549 to schedule an inspection.
Rattling usually indicates loose duct sections or failed supports, while air loss points to seam leaks — two problems that often occur together in 20757 split-levels. Sealing with mastic will stop the air loss, but you’ll also need support repair to eliminate the rattle and prevent future seam stress. We address both in a single visit for most Temple Hills split-levels. The combined repair typically runs $280–$520. Call (855) 301-6549 for an exact quote — estimates are free.
If the mold is superficial and the duct material itself is structurally sound, we can clean with HEPA-contained negative-pressure extraction and then seal to prevent recurrence. However, if the mold has penetrated deteriorated fiberglass duct board — common in Temple Hills’s older homes — cleaning alone won’t solve the problem; the compromised material needs replacement. We never recommend sealing over active mold growth. Robert Garcia will assess your specific situation and give you a straight answer on which approach applies. Call (855) 301-6549.
Metal ducts are generally the better long-term choice for Temple Hills’s shallow, moisture-prone crawl spaces. Flex duct’s inner liner can sag and pool condensation in low spots, and the insulation jacket degrades faster in humid conditions. Rigid metal with external insulation and mastic-sealed seams resists the moisture cycling that defines Prince George’s County crawl spaces. That said, flex duct has its place for short, properly supported connections in accessible areas. We’ll recommend the right material for each section of your system. Call (855) 301-6549 to discuss your specific layout.
Ready to fix your ductwork? Call Apex Air Duct Cleaning Maryland at (855) 301-6549 for a free estimate in Temple Hills. Robert Garcia, our owner and lead technician, will inspect your system personally and give you an honest repair-versus-replace recommendation — no pressure, no subcontracted crews, just 14 years of focused indoor air quality experience applied to your home.
Written by Robert Garcia, Owner at Apex Air Duct Cleaning Maryland, serving Temple Hills and the greater Baltimore-Washington corridor since 2010.