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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Sealing Across Lansdowne
Lansdowne homeowners know the difference between a crew that understands old houses and one that treats every job like a new build. Our Duct Sealing team works on Victorian and Colonial homes here regularly, from the tree-lined blocks near Lansdowne Avenue to the Tudor Revivals closer to the historic downtown. We dispatch from our Baltimore office and typically schedule Lansdowne appointments within a few business days, not weeks. If your ducts are leaking heated air into the attic or pulling basement dust through unsealed joints, call us at (361) 326-5060 for a free estimate and a written price before any work starts.
Why Hollis Air Duct Cleaning Is Lansdowne’s Preferred Duct Sealing Company
We’ve been sealing ducts in Lansdowne long enough to know that a 1920s Colonial on Stratford Avenue needs a different approach than a 1980s split-level near Penn Wood High School. The gravity-duct systems and retrofitted forced-air runs in this borough don’t forgive sloppy work.
Our customers here leave strong reviews because we show up inside the quoted window, price the job in writing before touching anything, and leave the site clean. That discipline is The Garrison Standard, and it’s how we’ve built our reputation in Lansdowne and across the Baltimore metro.
Response time matters when your heating bill spikes in January or your upstairs bedrooms won’t cool in July. We schedule Lansdowne jobs promptly, and our technicians arrive uniformed, background-checked, and equipped with professional-grade tools from Rotobrush and Abatement Technologies.
We also know the local quirks: unsealed duct chases behind plaster walls, coal-era debris still sitting in basement trunk lines, and the partial disconnections that happen when decades of renovations meet original metalwork. That local knowledge saves time and prevents callbacks.
Duct Repair in Lansdowne
Duct Repair in Lansdowne usually means fixing the damage that decades of use, humidity, and amateur modifications have caused to older metal and flex duct systems. In this borough’s 1890s – 1930s housing stock, we see crushed flex runs in attics, rusted metal joints in damp basements, and sections that have pulled apart where they were never properly supported. A typical duct repair in Lansdowne runs $180 – $450 depending on accessibility and the extent of the damage. We always inspect the full system before quoting, because patching one leak while ignoring three others wastes your money.
When Repair Beats Replacement
Most Lansdowne homes don’t need full duct replacement. Isolated damage to a few feet of metal duct, a disconnected collar, or a corroded elbow can be repaired with mastic sealing and mechanical fasteners, preserving the original system that was built to outlast modern flex duct by decades.
Basement and Attic Access Challenges
Many Lansdowne basements have low headroom and original stone foundations that make maneuvering difficult. Our crews carry compact equipment and work methodically in tight spaces, documenting the repair with before-and-after photos you can review before we pack up.
Air Duct Sealing in Lansdowne
Air Duct Sealing in Lansdowne addresses the conditioned air that escapes through gaps, joints, and seams before it ever reaches your rooms. In a borough where many homes still run retrofitted forced-air through unsealed metal chases and plaster wall cavities, leakage rates of 20 – 30 percent are common. We seal with mastic compound and reinforced tape rated for temperature cycling, not the hardware-store foil tape that peels off in humid basements. A typical whole-system duct sealing job in Lansdowne runs $800 – $1,800 for an average three-bedroom home, with larger Victorian properties toward the higher end. Every quote is written and agreed before work begins.
Mastic Sealing vs. Tape-Only Methods
We apply duct mastic, a thick, flexible compound that remains pliable and creates a permanent bond at joints and seams. Tape alone fails where temperature swings cause expansion and contraction, which is why we use mastic as the primary seal and tape only as reinforcement.
Pressure Testing After the Seal
After sealing, we run a pressure test to verify leakage reduction. You’ll see the before-and-after numbers in writing, along with photos of the sealed joints. If the system doesn’t meet the standard we quoted, we keep working until it does.
Trusted Brands We Service in Lansdowne
Our technicians carry parts and sealing products from Aprilaire, Guardsman, and Abatement Technologies, brands that commercial HVAC crews trust for durability in high-use systems. For Lansdowne homeowners, that means we don’t need to special-order basic materials and wait a week. A typical sealing job uses mastic rated for 200°F continuous exposure and reinforced mesh tape that won’t degrade in damp basement conditions. We also stock filtration upgrades from Honeywell and Aprilaire that pair well with sealed duct systems, since stopping leaks is only half the battle, keeping clean air moving through intact ducts is the other half. If your system needs a component we don’t carry, our Baltimore office coordinates fast delivery so we don’t leave you with a half-finished job.
Common Duct Sealing Problems We See in Lansdowne Homes
- Coal-era debris in original trunk lines. Homes along Lansdowne Avenue and near the historic downtown often have basement ductwork that dates to gravity-furnace days. That old metal still connects to modern systems, and the seams were never designed for forced-air pressure. We seal these transitions with mastic rated for the temperature swings of today’s furnaces.
- Unsealed duct chases behind plaster walls. When forced-air was retrofitted into Lansdowne’s Victorian and Colonial homes, installers sometimes ran flex duct through wall cavities without sealing the chase openings. Conditioned air leaks into wall voids, and wall dust gets pulled into the return. We seal the chase perimeter and repair damaged flex where accessible.
- Humidity-damaged tape in basements and crawl spaces. Lansdowne’s humid summers and stone-foundation basements create conditions where standard duct tape fails within a few years. We remove the failed material, clean the joint, and apply mastic that won’t peel when moisture levels spike in August.
- Disconnected or sagging flex runs in attics. Attic ductwork in Lansdowne’s older homes often lacks proper support, causing flex duct to sag, kink, or pull away from collars. We re-support the run, reconnect with mechanical fasteners, and seal with mastic and mesh for a joint that holds.
Pricing for Duct Sealing in Lansdowne, MD
Honest pricing starts with honest ranges. In Lansdowne’s market, spot duct sealing for isolated leaks runs $180 – $340. Whole-system sealing for an average home with 15 – 25 runs typically falls between $800 and $1,800. Larger Victorians with complex attic and basement duct networks can run $2,000 – $3,200. What moves the price: accessibility (crawl spaces and sealed chases take longer), the condition of existing ductwork (repairs add labor), and whether we need to remove old failed sealing material before applying new.
We don’t quote per-vent or bait you with a low teaser that balloons once we’re inside. The price is written, agreed, and locked before any work starts. That’s The Garrison Standard, and it’s how we’ve operated since 2004. Call (361) 326-5060 for a free estimate with no obligation.
We Also Serve Cities Near Lansdowne
Our crews work throughout the Baltimore metro, including Duct Sealing in Lansdowne and surrounding communities. We regularly schedule jobs in Baltimore, Columbia, Ellicott City, and Glen Burnie, with dispatch coordinated from our Baltimore office. If you’re in one of these areas and need duct sealing, the same written pricing and 365-Day Done Right Promise apply.
Serving Lansdowne, MD - Our Local Coverage Area
We’re based in the Lansdowne 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 Lansdowne
We typically schedule Lansdowne appointments within 2 – 4 business days, and our Baltimore office dispatches crews to the borough regularly. Call (361) 326-5060 to check current availability, we’ll give you a firm date and arrival window.
Yes, we work across the borough, from the Victorian blocks along Lansdowne Avenue to the Colonial homes near Penn Wood High School and the Tudor Revivals closer to Baltimore Pike. Older homes with retrofitted ductwork are actually our specialty.
We don’t classify duct sealing as an emergency service, but our phones are answered by a live person 24 hours a day, 7 days a week. If you’re without heat in winter or your system is failing due to severe duct damage, call (361) 326-5060 and we’ll prioritize your job or coordinate temporary measures.
Lansdowne prices align with the broader Baltimore metro market, though older homes here sometimes need more preparatory work, removing old failed tape, accessing sealed chases, that can nudge costs slightly above newer suburbs like Columbia. We quote each job individually after inspection, and the written price doesn’t change at the door.
Every duct sealing job is covered by our 365-Day Done Right Promise in writing. If a sealed joint fails, a repair we made comes apart, or the system doesn’t perform as quoted within one year, we return and make it right at no charge, including a free second visit. That’s not a verbal assurance, it’s printed on your invoice.
We also handle Air Duct Cleaning in Lansdowne and Dryer Vent Cleaning in Lansdowne if your system needs more than sealing. Many homeowners pair these services for a complete duct system refresh.
Ready to stop losing heated and cooled air to your attic and walls? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate on duct sealing in Lansdowne. We’ll inspect your system, explain what we find in plain terms, and give you a written price before any work begins. No pressure, no surprises, just sealed ducts and lower utility bills backed by a full year of coverage.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Lansdowne since 2004 as part of the Garrison Partners family.