The air your family breathesshouldn't be making them sick.
If your ducts run under the slab, years of moisture and rust are quietly pouring into every room of your home. DuctArmor restores them from the inside — no jackhammers, no demolition.
Your ducts aren't on the wall. They're buried in concrete.
From 1950 to 1978, in-slab systems often used transite duct, later outlawed for its asbestos. But in-slab ductwork is still installed today. Steel rusts. Concrete cracks. Groundwater seeps in. And every cycle of your air conditioner pushes whatever's down there into your house.
You don't need to demo your foundation to fix it.
A new duct, formed inside your old one.
We clean the inside of your existing ducts, then spray a patented polymer coating onto the walls. It bonds, hardens, and forms a new smooth surface that seals rust, cracks, and corrosion in one step.
The original ductwork stays exactly where it is. Your slab stays exactly where it is. And you get clean, airtight ducts you can use the same day.
Same duct. Drag to see the difference.
These are unretouched photos from real homes. Every job we do starts here — with a rusted, pitted, sometimes leaking piece of metal — and ends with a smooth, sealed, airtight new surface.
Three steps. One day. Zero demolition.
We inspect with a camera.
A certified dealer feeds a video scope through an existing register. You see exactly what we see — rust, debris, separations, water.
We clean every inch.
Loose rust, dust, and debris are removed through the existing openings. No demolition. No digging. Your flooring and foundation stay intact.
We coat the inside.
Our patented water-based polymer is sprayed through the duct in two full coats, forming a new smooth surface that seals everything in one continuous piece. The system can be used the same day and dries within a few days.
Give your family back the air they deserve.
Most in-slab ducts were installed decades ago and were never meant to last forever. If yours are leaking, rusting, or full of moisture, you're breathing a little bit of that every day. We can stop it in a single visit.
- — No demolition, no moved furniture, no open concrete.
- — Water-based, low-odor, safe for kids and pets.
- — Warrantied restoration through certified local dealers.
Restore duct systems without shutting down the building.
Schools, clinics, offices, government buildings — the same in-slab duct failures that plague older homes happen at commercial scale, and the cost of replacement is usually six figures and weeks of downtime. DuctArmor is installed through existing openings, overnight if needed.
- Downtime
- Same day
- Fire rating
- Class A Flame Rating
- Asbestos
- Encapsulated
Third-party tested. Publicly published.
We don't ask you to take our word for it. Download the reports and read them.
Ready to stop breathing rust?
DuctArmor is available only through trained, certified dealers. Find the one closest to you and get a real inspection, not a sales pitch.