A single 20 ft metal roofing panel costs about $25 to $90 in 2026, and most homeowners pay $35 to $60 for a standard corrugated or R-panel/PBR panel in galvanized steel or Galvalume. Painted and standing seam panels run higher. The number that actually matters is not the sticker on one panel but what it costs per square foot of roof once you account for how much a 20-foot panel covers. This guide prices the 20-foot panel as a purchase unit: cost by profile and gauge, coverage per panel, how many you need, and whether ordering the exact 20-foot length adds a premium.
What does a 20 ft metal roofing panel cost?
A 20-foot metal roofing panel costs $25 to $90 depending on profile, coating, and gauge. Bare or galvanized corrugated and R-panel/PBR sit at the low end, painted steel in the middle, and standing seam at the top. The table below is material only, before delivery, fasteners, trim, or labor.
| Panel profile (20 ft length) | Typical price per panel | Common coating |
|---|---|---|
| Corrugated steel (bare/galvanized) | $25 to $50 | Galvanized / Galvalume |
| R-panel / PBR (exposed fastener) | $35 to $65 | Galvalume or painted |
| Painted / coated steel panel | $55 to $90 | SMP or Kynar 500 (PVDF) |
| Standing seam (snap-lock) | $90 to $180 | Kynar 500 (PVDF) |
| Aluminum panel | $70 to $160 | Painted or mill finish |
Prices move with the steel market, so treat these as 2026 ranges rather than fixed quotes. The Roofing Brief tracks material movement in our roofing material price and inflation index, which follows BLS producer price data for metal roofing against CPI.
What is a 20 ft panel per square foot?
Most competitor pages quote a per-panel price but never tell you the coverage width, so you cannot convert it to a per-square-foot cost. Exposed-fastener panels are sold by net coverage width, not overall width. An R-panel/PBR covers 36 inches (3 ft) net, so a 20-foot panel covers about 60 sq ft. A corrugated sheet is often 32 inches wide but covers roughly 24 to 27.5 inches once the ribs overlap, so a 20-foot corrugated panel covers about 40 to 46 sq ft.
Divide panel price by net coverage to get the real number. A $50 PBR panel covering 60 sq ft works out to about $0.83 per sq ft in material. That is why the material ranges below matter more than any single panel price.
| Profile | Net coverage width | Coverage per 20 ft panel | Material cost per sq ft |
|---|---|---|---|
| Corrugated steel | 24 to 27.5 in | 40 to 46 sq ft | $0.65 to $1.20 |
| R-panel / PBR | 36 in | ~60 sq ft | $0.70 to $1.10 |
| Painted steel | 36 in | ~60 sq ft | $1.00 to $1.50 |
| Standing seam | 12 to 18 in | 20 to 30 sq ft | $1.80 to $3.00 |
| Aluminum / specialty | 12 to 36 in | varies | $2.00 to $4.00 |
Standing seam covers a narrow 12 to 18 inches per panel, so a 20-foot standing seam panel covers far less area than an exposed-fastener panel of the same length. That is why its per-panel price looks similar while its per-square cost is two to three times higher.
How does gauge change the price?
Gauge is panel thickness, and a lower number means thicker steel. Most residential and light commercial metal roofs use 26-gauge or 24-gauge steel. Stepping up from 26 to 24 gauge typically adds 25% to 40% to the panel price for the extra material. A 29-gauge panel, common at big-box stores for utility and agricultural use, is the cheapest but dents and oil-cans more easily.
- 29 gauge: lightest and cheapest, best for sheds, barns, and carports.
- 26 gauge: the common residential exposed-fastener choice, a balance of price and stiffness.
- 24 gauge: stiffer, standard for standing seam and coastal or high-wind jobs, 25% to 40% more than 26 gauge.
How many 20 ft panels does a roof need?
To count 20-foot panels, divide your total roof area by the net coverage per panel, then add 10% to 15% for waste, ridge overlap, and offcuts. A panel run should match your rafter length from ridge to eave so you avoid horizontal seams, which is the main reason buyers order a 20-foot length in the first place.
- Measure total roof area in square feet, including overhangs.
- Pick net coverage per panel from the table above (60 sq ft for a 20 ft PBR panel).
- Divide roof area by coverage per panel.
- Multiply by 1.10 to 1.15 for waste.
- Round up to a whole number of panels.
| Roof area (with slope) | PBR panels needed (60 sq ft each, +12% waste) | Material cost at $50/panel |
|---|---|---|
| 1,200 sq ft | ~23 panels | ~$1,150 |
| 1,700 sq ft | ~32 panels | ~$1,600 |
| 2,400 sq ft | ~45 panels | ~$2,250 |
Roof area is larger than house footprint because of pitch. A 1,500 sq ft home footprint often has 1,700 to 2,000 sq ft of roof surface. For a full whole-roof breakdown by pitch and region, see our metal roof cost per square guide.
Does ordering the 20 ft length cost extra?
A 20-foot panel is usually a cut-to-length order, not a stock item. Big-box retailers like Lowe’s and Home Depot stock common lengths such as 8, 10, 12, and 16 feet, and many cap corrugated panels near 12 feet. Local rollformers and metal suppliers cut exposed-fastener panels to any length up to about 40 feet, often at the same per-foot rate, so the 20-foot length itself rarely carries a surcharge.
What can add cost is handling. A 20-foot panel is long, flexible, and easy to kink or oil-can during transport and lifting. Suppliers may add a freight or oversize charge, and two people are needed to carry one safely. Weigh the single-run benefit of no end-lap seams against harder handling on a steep or tall roof.
What does a 20 ft metal roof cost installed?
Installed, a metal roof runs $5 to $16 per square foot, which includes panels, underlayment, trim, screws, and professional labor. For a 1,700 sq ft roof, that is roughly $8,500 to $27,000 depending on profile and region. Exposed-fastener panels sit at the low end and standing seam at the high end because of tighter tolerances and clip systems.
Material alone, using the 20-foot panels above, is often only $1,500 to $4,000 of that total, so labor and accessories drive most of the installed price. Panels are the smaller line item on almost every metal roof quote. For per-sheet pricing across gauges and coatings, see our breakdown of roofing sheet metal price per sheet, and for profile sizing options, our guide to corrugated roof panel sizes.
Where can you buy 20 ft metal roofing panels?
You can buy 20-foot panels from big-box retailers, metal-roofing specialists, and local rollformers, though only some stock the exact length. Retail is convenient for small jobs; a local supplier is usually cheaper per square foot and cuts panels to match your rafter length.
- Lowe’s and Home Depot: stock 26 and 29 gauge panels, mostly in shorter lengths; 20 ft may be special order.
- Menards: broad metal roofing selection with cut-to-length options in many regions.
- Metal specialists (King Metals, Western States Metal Roofing): cut exposed-fastener and standing seam panels to length, wider color and coating choice.
- Local rollformers: often the lowest per-square price and the shortest lead time for custom lengths.
Is a 20 ft panel the right choice?
A 20-foot panel is a good fit when your rafter run from ridge to eave is close to 20 feet, because a single panel spans it with no horizontal seam and fewer leak points. It is a poor fit for short runs, tight sites, or DIY crews without help, since long panels are harder to move and easier to damage.
| Pros of a 20 ft panel | Cons of a 20 ft panel |
|---|---|
| No end-lap seams on a single run | Harder to transport and lift safely |
| Fewer leak points along the slope | Prone to kinking and oil-canning if mishandled |
| Faster install on matching rafter lengths | Often special order, possible freight charge |
| Less waste when the run fits | Wasteful when cut down for short runs |
Frequently asked questions
How much does a single panel of 20-foot metal roofing cost on average?
A single 20-foot metal roofing panel averages $35 to $60 for standard corrugated or R-panel/PBR in galvanized steel or Galvalume. Painted steel panels run about $55 to $90, and standing seam panels reach $90 to $180. Bare 29-gauge utility panels can start near $25, while thicker 24-gauge and aluminum panels sit at the top of the range.
How many 20 ft panels do I need for my roof?
Divide your total roof area by the net coverage per panel, then add 10% to 15% for waste. A 20-foot R-panel/PBR covers about 60 sq ft, so a 1,700 sq ft roof needs roughly 32 panels including waste. Corrugated panels cover less per panel, about 40 to 46 sq ft, so you would need proportionally more.
Does 24 gauge cost more than 26 gauge in a 20 ft panel?
Yes. A 24-gauge 20-foot panel typically costs 25% to 40% more than the same panel in 26 gauge because it uses thicker steel. The heavier gauge resists denting and oil-canning better, which is why it is standard for standing seam and for coastal or high-wind installations where stiffness matters.
Does ordering a 20 ft length cost extra compared to stock lengths?
Usually not from a metal supplier or rollformer, which cut exposed-fastener panels to any length at the same per-foot rate. Big-box stores stock shorter lengths, so a 20-foot panel there may be a special order. The main added cost is freight or oversize handling, since long panels are harder to ship and carry.
Why choose a 20 ft panel instead of shorter panels?
A 20-foot panel can span a full rafter run from ridge to eave with no horizontal end-lap seam, which removes a common leak point and speeds installation. The tradeoff is handling: long panels flex, kink, and oil-can more easily, so they need two people and careful transport to reach the roof undamaged.
Want the fundamentals first? Start with our roofing learning hub.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.