TL;DR
Bare galvanized sheet metal ductwork is legitimate scrap and carries a modest credit at a metal yard, while flex duct, duct board, and insulation-wrapped trunk lines are trash. Separating the two is the whole job. Ductwork removal and haul is priced by system size, and it costs less if you strip and stage the metal yourself.
The credit is real but small. Nobody gets rich scrapping ductwork. What the sort actually saves you is the disposal fee on material that would otherwise be priced as mixed debris.
What Kind of Duct Do You Have?
Four categories, and they dispose completely differently.
Galvanized sheet metal. Rigid rectangular trunks and round pipe, typically 26 to 30 gauge steel with a zinc coating. This is scrap. It grades as shred or light iron at most yards, sometimes as a separate galvanized category.
Flex duct. A wire helix wrapped in a plastic liner, surrounded by fiberglass, sheathed in a foil or plastic jacket. A composite. The wire cannot be economically separated, so flex duct is trash.
Duct board. Rigid fiberglass panels with a foil face, formed into rectangular ducts. No metal, no recycling path, trash.
Insulated sheet metal. Metal duct wrapped externally in foil-faced fiberglass or lined internally. The metal is scrap once the insulation is off, and stripping it is manual work.
Count how much of each you have before you plan anything. Most houses are a mix.
The Scrap Side of the Job
Galvanized duct grades toward the bottom of the ferrous scrap market. It is thin, light for its bulk, and coated, so yards typically buy it as shred or light iron rather than a premium grade. A whole house of sheet metal ductwork, maybe 200 to 500 pounds, yields a small credit. Enough to be worth doing if the metal is already being handled, not enough to justify a special trip.
The metal earns more attention when the job includes a furnace, air handler, water heater, or old boiler. Those are heavy and their motors contain copper, which grades higher. Our guides to scrap metal value in junk removal and where to take scrap metal cover how loads get graded.
Full service haulers vary in whether they pass scrap credit along, and most do not itemize it. They price a metal-heavy load lower instead, because their disposal cost is lower. Ask how they handle it.
The Insulation Wrap Problem
Here is what turns a clean scrap load into a mixed debris load: fiberglass wrap.
Foil-faced fiberglass wrapped around trunk lines is standard in older basements and crawlspaces. It is dusty, it comes off in shreds, and it clings to the metal. Yards will reject or heavily downgrade duct that arrives still wrapped, because they are not paying to dispose of your insulation.
Stripping it is straightforward but unpleasant. Cut the tape, unwrap, bag the fiberglass, and stack the bare metal separately. Wear a respirator, long sleeves, and gloves, because old crawlspace fiberglass carries decades of dust along with the glass fibers. Internally lined duct is worse, since the liner is glued inside the metal and does not come out cleanly. Most people send lined duct out as mixed debris rather than fight it.
Bag the insulation as you strip. Loose fiberglass takes over a work area and is miserable to collect later. The disposal path for it is in our guide to old insulation removal and disposal.
Flex Duct Is Pure Volume
Flex duct is the material that fills the truck. A 25 foot section of 8 inch flex, uncompressed, occupies a large amount of space and weighs perhaps 10 pounds.
Compress it as you pull it. Flex collapses along its wire helix if you push it end to end, and a 25 foot run squeezes down to a couple of feet. Tape or zip tie it and it stays that way. That one habit routinely turns a two-truck attic job into a one-truck job, and it is worth more than the scrap credit.
Duct board is bulky, light, and does not compress. Break it flat and stack it. The foil face makes it look recyclable and it is not.
What Ductwork Removal Costs
Industry Baseline Range
| What is being priced | Published national range |
|---|---|
| Construction debris removal | $300 to $1,000 |
Source: HomeGuide, "Construction Debris Removal Cost" national cost guide.
These are industry baseline ranges for planning only and may not reflect Otesse's price. Otesse pricing is calculated for your specific home and ZIP code, so enter your ZIP in the price box on this page for your instant price.
Current Market Reality
Access dominates the price here more than material does. Ductwork lives in crawlspaces, attics, and above finished basement ceilings, and a technician working on their back in an 18 inch crawl covers a fraction of the ground per hour that the same person covers in an open basement. Ferrous scrap prices move with commodity markets, so the credit side of the equation is not stable. Disposal costs on the trash portion are charged by weight for the insulation and by volume for the flex, and a load full of uncompressed flex duct is priced on space it did not need to take up.
| Pushes the price up | Pulls it down |
|---|---|
| Heavy material such as concrete, tile, or plaster | Light debris such as trim and cardboard |
| A larger volume from a full gut | A single room or small project |
| Hazard testing or abatement for asbestos or lead | Materials already tested and cleared |
| Stairs, long carries, and tight access | Debris staged near the driveway |
Every home is different, so the real number depends on the material, the volume, and the access. Enter your ZIP in the price box on this page for your instant price.
Sequence for a Clean Job
Shut down and disconnect the system first, and cap open supply and return openings so debris does not fall into equipment that is staying. Work from the far ends toward the plenum, because pulling branches first leaves the trunk accessible and keeps a partially disconnected trunk from dropping.
Sort as you go into three piles: bare metal, bagged insulation, and compressed flex plus duct board. Sorting a mixed pile afterward takes twice as long. Sweep for sheet metal screws when you are done, since duct is assembled with hundreds of them. If this is part of refinishing a basement, the rest of that debris picture is in our guide to basement demolition debris.
FAQ
Is old ductwork worth scrapping?
Galvanized sheet metal duct is legitimate ferrous scrap, but it grades low and a full house yields only a modest credit. It is worth separating because it lowers your disposal cost, and it is worth a trip to a yard if a furnace or water heater is going out with it.
Can flex duct be recycled?
No. Flex duct is a composite of wire, plastic film, fiberglass, and foil that cannot be separated economically. It goes out as trash. Compress it along the wire helix before hauling, because uncompressed flex takes an enormous amount of truck space.
Do I have to remove the insulation from ductwork before scrapping it?
Yes, if you want the metal accepted at a good grade. Scrap yards reject or downgrade duct that arrives wrapped in fiberglass, because they will not pay to dispose of it. Strip the wrap, bag it separately, and deliver bare metal.
Is old duct insulation dangerous?
Fiberglass wrap is an irritant rather than a health hazard, and a respirator, long sleeves, and gloves handle it. In pre-1980 buildings, however, some duct tape wrap, boiler pipe insulation, and duct joint compound contained asbestos. Have an accredited inspector test before disturbing anything questionable, and use a licensed abatement contractor if it is positive.
How much does a house of ductwork weigh?
A typical residential sheet metal system runs 200 to 500 pounds of bare metal, plus insulation and flex duct on top of that. It is a light load by weight, which is why the job prices on labor and truck space rather than tonnage.
Getting It Hauled Away
Ductwork jobs go well when the three streams are separated at the source and the flex duct gets compressed on the way out. Strip the wrap, stack the bare metal, bag the fiberglass, and squeeze the flex. If you would rather hand the whole mix off, see our junk removal service and ask whether the metal goes to a yard rather than a landfill. Reach out to get a quote with the system size and access conditions.
