Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Guardsman Duct Sealing & Repair: The Brooklyn Owner’s Guide
If your Guardsman duct sealing has failed or you’re seeing gaps, tears, or separated joints in your ductwork, we can help. A typical Guardsman duct sealing and repair job in Brooklyn runs between $250 and $550 installed, depending on how much sealing material needs replacement and how accessible the duct runs are. Most owners discover the problem the same way: a room that never quite reaches temperature, a musty smell near a supply register, or visible tape peeling away from a duct joint in a basement or crawl space.
We’re an independent service provider in Brooklyn, not affiliated with Guardsman, but we work with Guardsman-compatible sealing tapes, mastics, and repair materials every week. Paul Adeyemi has spent years opening up ductwork across the borough, from Park Slope brownstones to pre-war buildings near Prospect Park, and the pattern he sees is consistent: the original sealing fails long before the duct itself does. Call (607) 536-9605 for a free estimate, and we’ll tell you exactly what you’re looking at before any work begins.
Which Guardsman Models This Applies To
Guardsman duct sealing and repair is not model-specific in the way a furnace part is. What matters more is the duct configuration and the sealing product originally used. Most Guardsman residential systems in Brooklyn use either foil-backed butyl tape or water-based duct mastic, and each behaves differently over time. If you can see a Guardsman label on your air handler or duct trunk, note the series number, but the sealing itself is matched to the duct material: galvanized steel, flex duct, or fiberboard.
One compatibility detail that trips up a lot of Brooklyn owners: older Guardsman systems installed before roughly 2010 used a thinner foil tape that dries out and loses adhesion within eight to ten years, especially in humid basement environments. Newer installations typically use mastic, which lasts longer but cracks if the ductwork shifts. When we come out, we match the replacement material to your existing duct type, not just to the Guardsman name. OEM Guardsman sealing tape is available, but quality aftermarket equivalents from brands we stock often perform better in Brooklyn’s humidity cycle for less money. We’re happy to show you both options and let you decide.
Styles & brands we work with
Signs Your Guardsman Duct Sealing & Repair Is Failing
- Uneven room temperatures. Rooms on the far end of the duct run stay cold in summer or warm in winter because conditioned air is leaking into wall cavities or the basement before it reaches the register. The leak is almost always at a taped joint that has separated.
- Dust accumulating faster than normal. When a duct joint opens up, the system pulls unfiltered air from wherever the gap is. That dust ends up blown through your registers and onto furniture. If you’re dusting noticeably more in one room, check the nearest register.
- A musty or stale smell when the system runs. Gaps in return ducting pull air from crawl spaces, between floors, or other unconditioned areas. That air carries whatever odor lives in those spaces straight into your living areas.
- Peeling tape or visible gaps you can see. In an unfinished basement, you may literally see the foil tape hanging loose from a duct seam, or old mastic cracked and falling away. This is the most reliable sign, and it means sealing has been failing for a while.
- Higher utility bills with no change in usage. When conditioned air leaks out before reaching the room, the system runs longer to hit the thermostat setting. Brooklyn summers make this particularly visible on Con Edison bills. A 15 to 20 percent leak across a system is common in homes where the original sealing is over a decade old.
Replacement Cost & What’s Included
In Brooklyn, expect to pay between $250 and $550 for Guardsman duct sealing and repair on a typical single-family home system. Here’s how that typically breaks down:
- Inspection and leak testing: $75 to $125. We locate every failed joint or gap before we quote the repair, not after.
- Sealing tape replacement (per duct run): $40 to $90 per run, depending on accessibility and the length of the run.
- Mastic application (per joint): $25 to $50 per joint. Mastic is the right choice for galvanized steel joints that have shifted.
- Full system re-seal for a typical Brooklyn home: $325 to $475 when multiple runs need work.
Every quote includes a written price before we touch anything. You’ll know the total before we start. If we open up a run and find something we couldn’t see from the access point, we stop and call you before doing anything that changes the number. That’s the only way we work.
Our labor on Guardsman sealing and repair is backed by the 365-Day Done Right Promise. If a sealed joint fails within a year, we come back and fix it. No argument, no invoice.
See the difference
Before
After
Before
After
Before
AfterDIY or Call Us?
You can safely inspect your own ductwork in Brooklyn if you can access it. Look for peeling foil tape, cracked mastic, or gaps at joints. That’s a reasonable Saturday afternoon task. What we’d caution against is the actual repair. Reaching seams in tight joist bays with duct mastic while lying on your back in a crawl space is how people hurt their backs and make a mess of the mastic. It’s also easy to apply tape to a dirty or greasy duct surface and have it fail within months because it never adhered properly. We’ve seen plenty of DIY tape jobs peeling off six months later.
For anything involving high-tension ductwork hangers, shifting sheet metal, or repairs near electrical lines or gas piping in a mechanical closet, call a trained technician. Those are the situations where a homeowner can genuinely get hurt. If you want an honest assessment of whether your sealing job is something we should handle, call (607) 536-9605. We’ll tell you what we see, what it costs, and what we plan to do about it, in that order.
FAQs
Foil-backed tape typically lasts 8 to 12 years in Brooklyn before adhesion fails. Properly applied mastic can last 15 to 20 years or more on stable ductwork. Humidity and temperature swings in unconditioned Brooklyn basements shorten both lifespans. If your sealing is a decade old, a visual inspection is worth scheduling. Call (607) 536-9605 and we’ll take a look.
In most cases, failed sealing can be repaired joint by joint. We remove the old tape or cracked mastic, clean the surface thoroughly, and apply new material. Full replacement of sealing is only needed when the duct itself has separated or shifted badly enough that the joint no longer aligns. We’ll tell you which situation you have before quoting anything.
A typical repair on three to five failed joints takes us between two and four hours, depending on access. If the sealing work requires opening drywall or working in a very tight crawl space, it can stretch longer. You’ll have a clear time estimate in your written quote before we start.
Yes. Our trucks carry foil-backed butyl tape, water-based duct mastic, and matching materials compatible with Guardsman systems, along with sealing materials for Lennox, Trane, and Carrier duct components. Most Brooklyn repair jobs are completed the same day we inspect, because the materials are already on board.
Contact Mortons Air Duct Brooklyn
If you have a Guardsman duct sealing failure or you just want a second set of eyes on your system, call us. We’ll give you an honest read, a written price before any work starts, and a sealed system that holds up to Brooklyn’s humidity. Floors protected, photo of the clean-up before we leave, and a live person on the phone whenever you call. Reach us at (607) 536-9605 for a free estimate.
Written by Paul Adeyemi, Owner, Mortons Air Duct Brooklyn at Mortons Air Duct Brooklyn, serving Brooklyn and nearby areas.