By The Roofing Brief Team. Last reviewed: October 2026.
The 20 ft metal roofing price in October 2026 is about $59 to $129 per panel for a 26-gauge R-panel/PBR at U.S. metal suppliers, and about $62 for a 29-gauge Galvalume corrugated sheet, before delivery, screws, trim or labor. A 20 ft R-panel covers 60 sq ft (36 in. net coverage), so that works out to roughly $0.98 to $2.14 per square foot of roof. Western States Metal Roofing’s 2026 cost guide puts steel panel material at $1.50 to $3.50 per square foot for Galvalume or galvanized and $2.00 to $4.00 painted. The number that matters is cost per square foot of roof, because 20 ft panels in different profiles cover very different areas.
What does a 20 ft metal roofing panel cost?
A 20-foot metal roofing panel costs about $59 to $129 for a 26-gauge R-panel/PBR at the suppliers below, with bare Galvalume at the low end and painted panels at the high end. Prices are material only, checked October 19, 2026, before delivery, fasteners, trim or labor.
| Panel (20 ft length) | Gauge and finish | Price per panel | Per sq ft of coverage | Source (checked Oct 19, 2026) |
|---|---|---|---|---|
| R-Panel (36 in. cover) | 26 ga Galvalume, unpainted | $59.00 ($2.95 per linear ft, cut to length) | $0.98 | Ironrod Steel, Houston |
| PBR panel, 3 x 20 ft | 26 ga Galvalume | $99.95 | $1.67 | SoCal Fence and Barn |
| R-Panel, 3 x 20 ft, white | 26 ga, 10-year polyester paint | $128.54 each; $96.40 at 101+ lb; $85.69 at 1,000+ lb | $1.43 to $2.14 | King Metals |
| Corrugated (2.67 in. pitch), 20 ft | 29 ga Galvalume | $62.40 | About $1.08 to $1.74, depending on net coverage | MG Building Materials, San Antonio |
| Steel panels, any profile | Galvalume or galvanized | $90 to $210 for a 60 sq ft panel (calculated) | $1.50 to $3.50 | Western States Metal Roofing, Jan 11, 2026 |
| Steel panels, any profile | Painted | $120 to $240 for a 60 sq ft panel (calculated) | $2.00 to $4.00 | Western States Metal Roofing, Jan 11, 2026 |
| Aluminum panels | Painted or mill | Varies with panel width | $3.50 to $6.50 | Western States Metal Roofing, Jan 11, 2026 |
Prices move with the steel market; Western States notes its figures are based on steel prices as of January 11, 2026. 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?
Exposed-fastener panels are sold by net coverage width, not overall width, and many per-panel listings never state it. An R-panel/PBR covers 36 inches (3 ft) net, per Ironrod and King Metals, so a 20-foot panel covers 60 sq ft. Corrugated varies by product: Gibraltar’s big-box corrugated sheet is 25-5/8 in. wide but covers 21-1/2 in. once lapped, while Western States’ 7/8 in. corrugated is 39 in. wide and covers 34.67 in. on a roof per its product data sheet, so a 20-foot corrugated panel covers about 36 to 58 sq ft. A metal roofing calculator turns that coverage width into a panel count for the whole roof.
Divide panel price by net coverage to get the real number. A $59 R-panel covering 60 sq ft works out to about $0.98 per sq ft in material; the same $62.40 corrugated sheet costs $1.74 per sq ft if it covers 21.5 in., or $1.08 if it covers 34.67 in.
| Profile | Net coverage width | Coverage per 20 ft panel | Material cost per sq ft | Source |
|---|---|---|---|---|
| Corrugated, big-box sheet (Gibraltar) | 21.5 in | 35.8 sq ft | About $1.74 at $62.40 | Gibraltar Building Products help center; MG Building Materials price |
| Corrugated, 7/8 in. (Western States) | 34.67 in (roof) | 57.8 sq ft | $1.50 to $4.00 by finish | Western States data sheet and cost guide |
| R-panel / PBR | 36 in | 60 sq ft | $0.98 to $2.14 at retail | Ironrod Steel; King Metals; SoCal Fence and Barn |
| Painted steel, any 36 in. profile | 36 in | 60 sq ft | $2.00 to $4.00 | Western States cost guide |
| Standing seam | 12 to 18 in | 20 to 30 sq ft | About twice exposed-fastener panels | Western States: exposed fastener costs about half of standing seam |
Standing seam covers a narrow 12 to 18 inches per panel, so a 20-foot standing seam panel covers 20 to 30 sq ft, against 60 sq ft for an R-panel of the same length. Western States says exposed-fastener panels cost about half the price of standing seam panels, so a standing seam panel can look similar per piece while costing roughly twice as much per square foot of roof.
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 adds 25% to 40% to the panel price, per Western States Metal Roofing’s 2026 cost guide. A 29-gauge panel, common at big-box stores for utility and agricultural use, is the cheapest; Ironrod lists 26-gauge at 0.0185 in. thick and 29-gauge at about 0.0142 in.
- 29 gauge (about 0.0142 in.): lightest and cheapest, used on sheds, barns and carports; MG Building Materials lists a 20 ft 29-gauge Galvalume corrugated sheet at $62.40.
- 26 gauge (0.0185 in.): the common residential exposed-fastener choice; 20 ft R-panels run $59 to $129 at the suppliers above.
- 24 gauge: stiffer, standard for standing seam and coastal or high-wind jobs, 25% to 40% more than 26 gauge per Western States.
Decision table: is a 20 ft panel right for your roof?
| If | Then | Rule or source |
|---|---|---|
| Your ridge-to-eave run, plus overhang, is 18 to 20 ft | Order 20 ft panels for one seamless run | No end lap on the slope |
| The run is longer than 20 ft | Order panels cut to the full run instead of lapping two | Western States cuts corrugated from 1 to 52 ft |
| Roof pitch is below 3:12 with lapped exposed-fastener panels | Use lap sealant (allowed down to 1/2:12) or switch to standing seam (1/4:12) | IRC R905.10.2 minimum slopes; Western States and Union MasterRib list 3:12 minimum |
| The roof is a carport, barn or shed | 29 gauge is common and cheapest | About $62 per 20 ft corrugated sheet (MG Building Materials) |
| Coastal, hail or high-wind site | Step up to 24 gauge | Adds 25% to 40% over 26 gauge (Western States) |
| You need fewer than 20 panels | Price single-panel retail; check freight on long items | King Metals adds freight on 20 ft panels; weight tiers start at 101 lb |
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, 35.8 to 57.8 sq ft for corrugated).
- 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 at $59/panel (Ironrod) | Material at $96.40/panel (King Metals, 101+ lb) |
|---|---|---|---|
| 1,200 sq ft | 23 panels | $1,357 | $2,217 |
| 1,700 sq ft | 32 panels | $1,888 | $3,085 |
| 2,400 sq ft | 45 panels | $2,655 | $4,338 |
Roof area is larger than house footprint because of pitch: a 6:12 roof has about 1.12 times the area of its plan footprint, so a 1,500 sq ft home with modest overhangs 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 or a stocked long length at a metal yard, priced by the linear foot. Ironrod cuts its 26-gauge Galvalume R-panel to any whole-foot length at $2.95 per linear foot, so a 20 ft panel costs the same per foot as a 10 ft one, and Western States lists corrugated panel lengths from 1 ft to 52 ft. Big-box panels are often sold in shorter fixed lengths (Union’s MasterRib, for example, comes in 10 to 16 ft at PBS Direct), so a 20-foot piece there may be a special order.
What can add cost is handling. King Metals notes that “due to the dimensions of this item, additional freight charges will apply” on its 20 ft R-panel, and a 20-foot panel is long, flexible and easy to kink or oil-can during transport and lifting. 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, Western States Metal Roofing’s 2026 guide puts a corrugated metal roof at $7 to $12 per square foot and standing seam at $10 to $16 per square foot, including panels, underlayment, trim, screws and labor. For a 1,700 sq ft roof, that is roughly $11,900 to $20,400 in corrugated or $17,000 to $27,200 in standing seam. Exposed-fastener panels sit at the low end and standing seam at the high end because of tighter tolerances and clip systems. For one exposed-fastener profile in detail, see our 5V metal roofing cost guide.
Material alone, using the 20-foot panel counts above, is $1,888 to $3,085 for a 1,700 sq ft R-panel roof, or about 9% to 26% of the installed corrugated range, so labor and accessories drive most of the installed price. 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 manufacturers and local rollformers or steel yards, though only some stock the exact length. Retail is convenient for small jobs; a local yard that cuts by the linear foot (Ironrod’s $2.95 per foot for 26-gauge Galvalume R-panel, for example) 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; Lowe’s lists a Metal Sales 3 ft x 20 ft ribbed panel, but availability varies by store.
- Menards: broad metal roofing selection with cut-to-length options in many regions.
- Metal specialists (King Metals, Western States Metal Roofing): King Metals sells a 26-gauge 3 x 20 ft R-panel at $128.54 each with weight-tier discounts; Western States is a manufacturer with a $3,000 job minimum for homeowner quotes.
- Local rollformers and steel yards: 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 fits when your rafter run from ridge to eave, plus overhang, is close to 20 feet, because a single panel spans it with no horizontal seam. It is a poor fit for runs under about 16 feet, tight sites, or DIY crews without a second person, since long panels are harder to move and easier to kink.
| 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 26-gauge R-panel/PBR cost $59 to $129 at U.S. metal suppliers in October 2026: $59 cut to length at $2.95 per foot in unpainted Galvalume, $99.95 for a Galvalume PBR panel, and $128.54 for a white painted R-panel. A 29-gauge Galvalume corrugated sheet listed at $62.40. Painted and 24-gauge 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 60 sq ft, so a 1,700 sq ft roof needs about 32 panels including waste. Corrugated panels cover 35.8 to 57.8 sq ft depending on the product’s net coverage width, so you may need more.
Does 24 gauge cost more than 26 gauge in a 20 ft panel?
Yes. A 24-gauge panel typically costs 25% to 40% more than the same panel in 26 gauge, per Western States Metal Roofing’s 2026 cost guide, 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 per foot: yards that cut by the linear foot, such as Ironrod at $2.95 per foot for 26-gauge Galvalume R-panel, charge the same rate for any length. Big-box stores stock shorter lengths, so a 20-foot panel there may be a special order. The main added cost is freight; King Metals adds freight charges on its 20 ft panels.
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. Below 3:12, lapped exposed-fastener panels also need lap sealant under IRC R905.10.2, so fewer laps means fewer sealed joints. The tradeoff is handling: long panels flex and kink more easily and need two people to carry.
Want the fundamentals first? Start with our roofing learning hub.