Corrugated roof panels are roll-formed or extruded sheets with a repeating wave profile, sold in standard widths of 26 to 36 inches, lengths of 6 to 12 feet, and materials that split into two families: metal (galvanized steel, Galvalume, aluminum) and plastic (polycarbonate, PVC). The number that actually governs your order is coverage width, not overall width, because panels overlap. This guide covers every panel spec, size, and material so you can order the right sheet and count the right quantity.
Most guides pick a lane: metal-only cost pages or plastic-panel product listings. This is the reference that puts metal and polycarbonate corrugated panels in the same size chart, with the coverage-width math and overlap rules you need to buy either one. For metal roofing install steps and installed-cost benchmarks, see our corrugated metal roofing guide. This page owns the panel specs.
What are corrugated roof panels?
Corrugated roof panels are sheets pressed or extruded into a repeating ridge-and-valley wave that stiffens a thin material so it can span rafters or purlins without sagging. The wave is the whole point: a flat sheet of 26-gauge steel would flex under a boot, but the same steel folded into a corrugated profile carries roof loads across open framing. Panels ship in flat lengths and overlap side to side and end to end.
Two material families dominate. Metal corrugated panels (steel, aluminum) are structural, opaque, and last 40 to 70 years. Plastic corrugated panels (polycarbonate, PVC, fiberglass) are translucent or clear, lighter, and used for patio covers, greenhouses, carports, and daylighting strips. Both use the same wave logic and often the same profile names, which is why a polycarbonate panel can nest against a metal one on the same structure.
Corrugated roof panel sizes and dimensions
Standard corrugated roofing sheets run 26 to 36 inches wide, 6 to 12 feet long, with roughly 2 to 4 inches lost to side overlap. That gap between overall width and coverage width is the single most common ordering mistake: a 36-inch panel usually covers only 32 to 34 inches once the ribs lap. Order by coverage width, then add end-lap allowance for any run longer than one panel.
| Spec | Metal (steel/aluminum) | Polycarbonate / PVC |
|---|---|---|
| Overall width | 26 to 36 in | 26 in (typical) |
| Coverage width | 24 to 34 in | ~24 in (26 in nominal) |
| Length | 6 to 12 ft, custom cut | 6, 8, 10, 12 ft |
| Thickness / gauge | 29 to 22 gauge (0.014 to 0.030 in) | 0.8 to 1.2 mm single-wall; 4 to 25 mm multiwall |
| Common profiles | 7/8 in, 1/2 in, R-panel, 5V crimp | MR9, MR12, Greca (square wave) |
| Rib spacing | ~2.67 in (7/8 profile) | Matched to metal for co-installation |
End lap matters as much as side lap. On low slopes, panels overlap 6 to 8 inches end to end; steeper slopes may need only 4 inches. Always add lap length to your total run before dividing by panel length, or you will come up a panel short on a long rafter.
How do you calculate how many corrugated panels you need?
Divide the roof face width by the panel coverage width, then round up, to get panels per row. Then divide the rafter length (plus end-lap and eave overhang) by panel length to get rows. Multiply for total panels. Coverage width, not overall width, is the divisor. For a full worked example with the pitch multiplier, see our metal roofing calculator.
- Measure each roof plane: eave width and rafter (slope) length in inches.
- Panels per row = roof width divided by coverage width, rounded up.
- Rows = (rafter length + overhang + end-lap) divided by panel length, rounded up.
- Total panels = panels per row multiplied by rows, per plane, then summed.
- Add 5 to 10 percent for waste on cut-heavy roofs (hips, valleys, dormers).
What profiles do corrugated roof panels come in?
The profile is the shape and size of the wave, and it sets both the look and the load rating. Metal corrugated panels center on two classic profiles, 7/8 inch and 1/2 inch, named for the depth of the corrugation, plus wider-rib panels like R-panel and 5V crimp. Plastic panels use MR9, MR12, and Greca profiles sized to nest against the common metal waves.
| Profile | Wave depth / spacing | Typical use |
|---|---|---|
| 7/8 in corrugated | 0.875 in deep, ~2.67 in pitch | Structural roofing, longer spans, agricultural |
| 1/2 in corrugated | 0.5 in deep, tighter pitch | Siding, accent, shorter spans, residential |
| R-panel (PBR) | 1.25 in ribs, 12 in spacing, 36 in coverage | Commercial, metal buildings, wide coverage |
| 5V crimp | Five raised V ribs per sheet | Residential, cabins, exposed-fastener look |
| MR9 / MR12 (plastic) | Matched to 7/8 metal wave | Polycarbonate/PVC daylight and patio panels |
The 7/8 inch profile is the workhorse for actual roofing because the deeper wave stiffens the panel for wider purlin spacing. The 1/2 inch profile is shallower and reads more decorative, so it shows up on siding and shorter-span accent roofs. Because MR9 and MR12 plastic panels match the 7/8 metal pitch, builders run clear polycarbonate strips inside a metal roof for daylighting without a profile mismatch.
What materials are corrugated roof panels made of?
Corrugated roof panels come in metal (galvanized steel, Galvalume steel, aluminum, stainless) and plastic (polycarbonate, PVC, fiberglass). Metal is opaque, structural, and long-lived; plastic is translucent or clear and used where light transmission or low weight matters. The material choice drives cost, lifespan, and where the panel makes sense far more than the profile does.
Metal corrugated panels
Metal corrugated panels are roll-formed from coated steel or aluminum coil. Galvanized steel carries a zinc coating and is the cheapest; Galvalume adds aluminum to the zinc for better corrosion resistance and is the common roofing default. Aluminum resists rust outright and suits coastal builds. Residential panels typically run 24 to 26 gauge with a Kynar 500 (PVDF) or SMP paint finish. For the galvanized versus Galvalume and gauge tradeoffs, see our steel roofing guide.
Polycarbonate and PVC corrugated panels
Polycarbonate corrugated panels are clear or tinted plastic sheets rated for high impact and UV resistance, roughly 10 times stronger than acrylic and about 200 times stronger than glass. They come single-wall (0.8 to 1.2 mm) for corrugated roofing and multiwall (4 to 25 mm) for insulated glazing, in clear, opal, and bronze tints. PVC corrugated panels are a lower-cost translucent option for utility covers. Both suit patio roofs, carports, greenhouses, and daylighting, not full weathertight house roofs, because plastic expands more with heat and needs oversized fastener holes and gasketed screws to move.
How much do corrugated roof panels cost?
Corrugated metal panels cost about $1 to $5 per square foot for material alone, while corrugated polycarbonate and PVC panels run roughly $2 to $6 per square foot. Per panel, expect about $17 to $113 per sheet depending on material, size, and finish, with a typical single sheet around $40. These are material-only prices; installed metal roofing costs more once labor, fasteners, and trim are added.
| Panel material | Cost per sq ft (material) | Typical per-sheet | Lifespan |
|---|---|---|---|
| Galvanized steel | $1.00 to $3.00 | $17 to $60 | 40 to 60 yrs |
| Galvalume steel | $1.50 to $4.00 | $25 to $70 | 40 to 70 yrs |
| Aluminum | $2.00 to $5.00 | $35 to $90 | 50+ yrs |
| Polycarbonate | $2.50 to $6.00 | $30 to $113 | 10 to 20 yrs |
| PVC (plastic) | $2.00 to $4.00 | $17 to $60 | 7 to 15 yrs |
Costs vary by gauge or thickness, finish, panel length, and regional freight. Painted PVDF metal panels sit at the top of the metal range; bare galvanized sits at the bottom. For installed metal-roof pricing with labor and trim, our corrugated metal roofing cost guide carries the per-square installed benchmarks that this specs page does not duplicate.
Which corrugated panel should you choose?
Choose metal corrugated panels for a real house or building roof that must be weathertight and long-lived, and choose polycarbonate or PVC for patio covers, carports, greenhouses, and daylighting where you want light through the panel. For a full house roof on open purlins, a 24 to 26 gauge Galvalume 7/8 inch panel is the durable default; for a covered deck you want light under, a clear polycarbonate MR panel makes more sense.
- Full house or barn roof: 24 to 26 gauge Galvalume or aluminum, 7/8 in profile, PVDF finish.
- Patio, pergola, carport: single-wall polycarbonate, MR9 or MR12 profile, clear or bronze.
- Greenhouse or daylight strip: polycarbonate for impact and UV, matched to the metal profile beside it.
- Budget utility cover: PVC corrugated, accepting the shorter 7 to 15 year lifespan.
- Coastal or corrosive site: aluminum metal panels over galvanized to avoid rust.
Whatever you pick, fasten through the rib crown (not the valley) on metal, use gasketed screws sized for the material, and honor the manufacturer overlap and slope minimums. Corrugated panels are exposed-fastener systems, so the screw and the lap, not the panel alone, decide whether the roof leaks. For a broader material comparison across all roof types, see our roofing materials comparison.
Frequently asked questions
What size are corrugated roof panels?
Corrugated roof panels are typically 26 to 36 inches wide, with 24 to 34 inches of usable coverage after side overlap, and 6 to 12 feet long, often custom cut. Metal panels run 29 to 22 gauge; polycarbonate and PVC single-wall panels run 0.8 to 1.2 mm thick. Always order by coverage width, not overall width, because panels lap 2 to 4 inches at the ribs.
How much do corrugated roof panels cost?
Corrugated metal panels cost about $1 to $5 per square foot for material, and polycarbonate or PVC panels run roughly $2 to $6 per square foot. Per sheet, panels range from about $17 to $113, with a typical single panel near $40. Painted PVDF steel sits at the top of the metal range and bare galvanized at the bottom. Labor, fasteners, and trim add to installed cost.
What is the difference between corrugated panels and metal panels?
Corrugated is a profile shape, a repeating wave, while metal describes the material. Corrugated panels can be metal (steel, aluminum) or plastic (polycarbonate, PVC). Not all metal roof panels are corrugated either: standing seam and R-panel are metal but use different profiles. So a corrugated metal panel is one specific combination of the wave profile and a metal substrate.
Can you use polycarbonate corrugated panels for a roof?
Yes, for patio covers, carports, greenhouses, and daylighting, polycarbonate corrugated panels work well because they are impact and UV resistant and let light through. They are not the choice for a fully weathertight, insulated house roof. Polycarbonate expands with heat, so it needs oversized fastener holes, gasketed screws, and closure strips to move without cracking or leaking.
How many corrugated panels do I need?
Divide each roof plane width by the panel coverage width and round up for panels per row, then divide the rafter length plus overhang and end-lap by panel length for rows, and multiply. Add 5 to 10 percent waste on roofs with hips, valleys, or dormers. Use coverage width, not overall width, as the divisor, or you will order too few panels.
What gauge corrugated metal roofing is best?
For residential and light commercial roofing, 24 to 26 gauge is the common choice, with 24 gauge stiffer and better for wider purlin spacing or higher wind zones. 29 gauge is thinner and cheaper, used mostly on agricultural and utility buildings. Lower gauge numbers mean thicker steel, so 22 gauge is heavier duty than 26 gauge.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.