FIG. 005Specimen · In Stock
Coal-Fired Steel Sheets
$3.50per square foot
In Stock · ~400 sqft per size
Browse online · buy in person · cash, card or Bitcoin · we load with forklift ·720-236-0454 · Plan your visit
Last verified August 13, 2026 · inventory turns weekly, so call 720·236·0454 before you drive over
- Species
- Weathering steel (COR-TEN type)
- Dimensions
- 24×42in to 36×42in · sizes vary
- Reclaimed
- Exhaust ports, decommissioned coal power plant
- Quantity
- ~400 sqft per size
- Note
- No nail holes · no minimums · sold by usable area
| Sheet size | Usable sq ft | Each |
|---|---|---|
| 24in × 42in | 7.00 | $24.50 |
| 26in × 42in | 6.71 | $23.48 |
| 26in × 36in | 6.50 | $22.75 |
| 27in × 42in | 7.88 | $27.56 |
| 36in × 36in | 9.00 | $31.50 |
| 32in × 42in | 9.33 | $32.67 |
Prices verified August 13, 2026 · call 720·236·0454 to confirm stock
These are exhaust port baffles out of a decommissioned coal-fired power plant. Not sheet stock somebody rusted on purpose — the actual baffles, with the corrugation still in them.
$3.50 per square foot. No minimums. Most sheets land between $22.75 and $32.67 each.
We charge by usable area, not by the outside dimension. These sheets rusted in service and the edges have rusted down on many of them. Measuring the full rectangle and charging for it would mean billing you for steel you are going to cut off. So we measure what you can actually use, and that is the number on the ticket.
Why they look like that
The herringbone corrugation is not decoration. It was there to shed water off the baffle so the plant could catch it and run it again. Water moved across these sheets for years, and it left two things behind: rust, and calcium.
The calcium is the part people react to. Minerals dissolved in the water deposited on the steel as it drained, which is why the colour runs in bands and streaks down the sheet instead of sitting flat across it. Copper, oxblood, bronze, pale grey — and no two the same, because no two sat in the same spot in the plant.
Why they were available at all
Baffles rust. That is the job — they sit in wet exhaust and they corrode, and eventually the plant pulls them and puts new ones in. What is a maintenance cycle for a power station is a supply of large, flat, hole-free steel for everybody else.
What to expect, plainly
Four things worth knowing before you buy, none of which are in our interest to tell you and all of which you would rather hear now than at the counter:
- Sizes vary by about two inches in width and height, sheet to sheet. Bring the dimensions of your opening rather than ordering to a number.
- Some sheets have small holes. These are not to be used as a waterproof surface — they are cladding. If water has to be kept out, something behind them has to do that job.
- We cannot guarantee any specific size is in stock. Most sizes hold around 400 square feet, but a big order can take a size out overnight. Call before you drive over.
- This is a reclaimed material. It came out of a power station. Every sheet is different and that is the point of it.
What people put them on
Wainscoting, backsplashes, fireplace surrounds, island and cabinet cladding, accent walls, gates, planters, privacy screens. Anywhere you want a wall to have texture and depth instead of a flat painted colour.
They beat corrugated tin for this by a mile. Tin is thin, dents if you look at it, and is usually perforated with old fastener holes. These are rigid, flat, and clean.
Sizes
26×42in, 26×36in, 36×36in and 32×42in, roughly 400 square feet in each. No minimum, so a single sheet for a backsplash is fine.
Call 720-236-0454. Bring gloves — the edges are sharp.
FIG. 005.QQuestions
Coal-Fired Steel Sheets — common questions
What are coal-fired steel sheets?
They are exhaust port baffles pulled from a decommissioned coal power plant. Each sheet is corrugated in a tight herringbone pattern that was designed to shed water so it could be captured and recycled. That pattern, plus the rust and calcium staining left by years of water running over it, is what you are buying.
How much do coal-fired steel sheets cost in Denver?
$3.50 per square foot with no minimum order, which puts most sheets between $22.75 and $32.67 each. We charge by usable area, not by the outside dimension — the edges rust down on these and we do not ask you to pay for steel you cannot use.
Are the sheets all the same size?
No. Common sizes run from 24x42in up to 36x42in and we carry plenty of others. Each size varies about two inches in width and height, so measure your opening and bring it to us rather than ordering to a number.
Are they waterproof?
No. Some sheets have small holes and they should not be used as a waterproof surface. They are cladding, not roofing or flashing. If water has to be kept out, put something behind them that does that job.
Where does the colouring come from?
Calcium. The water moving through the exhaust ports carried dissolved minerals, and they deposited on the steel as it passed. That is why the colour runs in streaks and bands rather than sitting evenly across the sheet, and it is why no two sheets match.
Can these be cut and welded?
Yes. They cut, weld and form like any steel sheet, and they are free of nail holes, which is the main thing that makes salvaged corrugated tin miserable to work with.
Will they stain the concrete under them?
Yes, if they are unsealed and outdoors. Runoff carries rust and it will mark a patio or a light-coloured surface. Plan a drip edge, seal the sheet, or accept the staining as part of the look.
What do people build with them?
Wainscoting, kitchen and bar backsplashes, fireplace surrounds, cabinet and island cladding, accent walls, gates, planters and privacy screens. Most of what leaves the yard goes on a wall.
When it's gone, it's gone.
Inventory turns over weekly. Call ahead, then pull your truck up — we load with the forklift.