Service 02 of 06
Find the leak. Seal it properly.
We find where the conditioned air is escaping — a dropped boot, a split flex, an unsealed plenum seam — and close it with mastic and mechanical fasteners, not tape that lets go in a year.
In short
AMG repairs and seals residential and commercial ductwork across New Jersey. The most common job is not dramatic: a branch that has pulled off its boot in a crawlspace, a flex run crushed under storage in an attic, or plenum seams that were never properly sealed when the system was installed. Any of those quietly dumps conditioned air into a space nobody lives in, which is why one room never keeps up while the rest of the house is fine. We inspect the accessible runs, find the leaks, then close them with mastic and mechanical fasteners rather than tape, because tape dries out and releases — usually within a couple of seasons in an unconditioned attic. Where a run is beyond sealing, we replace that section rather than patch it. Every repair is photographed. Free estimate, quoted before work starts.
Updated
What you get
A disconnected branch or a crushed flex run is the usual reason one bedroom sits four degrees off the rest of the house. Airflow improvement is the single most-mentioned result in our Google reviews — eleven of them name it directly.
Duct tape on a duct is a running joke in this trade for a reason: the adhesive bakes out in an attic and the joint opens again. We use mastic and mechanical fasteners, which is what the seam is supposed to have had in the first place.
Every cubic foot of conditioned air that leaves through an open seam was paid for at the furnace or the compressor. Sealing the accessible runs is the cheapest airflow work there is, and it does not require touching the equipment.
Some runs are past sealing — flex that has been compressed for a decade, or a trunk with corrosion through the seam. We say so and quote the replacement section instead of charging you to patch something that will fail again.
When to call
Step by step
Attic, crawlspace, basement and any exposed trunk. We look for disconnects, kinks, crushed flex, corroded seams and unsealed joints.
Registers are checked for airflow against the rest of the system so the weak branch is identified rather than guessed at.
You get the photo before the repair is quoted. Nobody should approve work on a duct they have never seen.
Mastic on the seams, mechanical fasteners at the connections, and proper strapping so a repaired run is not resting on a joist waiting to sag again.
Crushed or corroded sections are cut out and replaced with new duct rather than wrapped and hoped for.
We confirm the branch is delivering again before we pack up, and photograph the finished work.
Duct tape is a pressure-sensitive adhesive on a cloth backing, designed for temporary holds at room temperature. A New Jersey attic swings from below freezing in January to well over a hundred degrees in July, and that cycle drives the plasticiser out of the adhesive. What is left is a stiff film that shrinks, curls at the edge and releases the joint — usually within two summers. Mastic is a different thing entirely: a thick fibre-reinforced paste that is brushed over the seam and cures into a flexible solid bonded to the metal. It moves with the duct as it expands, it does not dry brittle, and it fills the irregular gap at a boot connection that no tape can bridge. Where the joint also needs mechanical strength, sheet-metal screws or a draw band go in first and the mastic goes over the top. That combination is what the seam should have had on the day the system was installed.
Nobody looks at ductwork they cannot stand up next to, which is exactly why the failures concentrate there. In a crawlspace the enemies are moisture, rodents and time: insulation sags off the run, a boot works loose from its floor register, and the branch ends up delivering to the dirt. In an attic the enemy is storage — a box on a flex run compresses it to a third of its diameter, and the run never recovers because flex has no memory. Both problems are invisible from inside the house. What you notice instead is one room that will not hold temperature and a system that runs longer than it used to. We photograph these runs specifically, because it is the only way most homeowners will ever see them.
Before you book
Cleaning is for what is inside the duct; repair is for the duct itself. If a room is consistently off temperature, airflow at one register is weak, or you can hear rushing air near the air handler, that is a repair symptom. Dust streaks at the grille and a musty smell on start-up are cleaning symptoms. Plenty of houses need both, and we will tell you which is doing the damage.
Yes — that is where most of the work is, because those are the runs nobody has looked at since installation. Access is the practical limit rather than the repair itself: if a section is genuinely unreachable without cutting finished ceilings, we tell you that before quoting rather than after.
No. Duct tape releases once an attic has been through a summer or two, which is why the joint you paid to seal opens again. We use mastic and mechanical fasteners, which is what the connection should have had originally, and it stays sealed through the temperature swing.
Air that leaks into a crawlspace was still heated or cooled by your equipment, so yes, closing it up stops paying for conditioning space you do not live in. We will not put a percentage on your house, because the honest answer depends on how leaky it is now — which is what the inspection is for.
It depends on the condition of the run, not its age. Rigid trunk that is sound but unsealed is a straightforward repair. Flex that has been crushed for years, or metal with corrosion through the seam, is replacement work — sealing it just moves the failure a few feet along. We will show you the photo and say which one you are looking at.
Also on the same system
The whole system — returns, plenums, trunk lines, branches and every register.
See the work
New runs for additions, replacements for systems past sealing.
See the work
The dryer line — from the machine, through the wall, to the outside hood.
See the workOpen 24 hours, by appointment. Tell us the system, the symptom and the town.
(877) 824-9359What people say
5.0
396 reviews on Google
What reviewers mention most
Leo and his team were professional and did a great job with the cleaning and the vent repair. Will definitely recommend
Cleaning and vent repair
I had a great experience with your technicians Leo and Danny. The work professionally and communicate with the client. Thank you for your service!!
Air duct cleaning
Danny was fast and reliable, replaced my dryer vent quickly and was very professional. Would look forward to working with you again.
Dryer vent replacement
Free estimate
We look before we quote, and the number we quote is the number you pay.
Open 24 hours, by appointment
Rather talk to someone? Call (877) 824-9359 — open 24 hours, by appointment.
