What size are metal roofing sheets?
Short answer. Metal roofing sheets are typically 2 to 3 feet wide and come in stock lengths such as 8, 10, 12 and 16 feet at home centers, while metal suppliers cut them to any length you order so one sheet can run the full slope. Thickness is sold by gauge, with 29 gauge the thinnest common option and 24 gauge the heaviest typical for homes.
Stock vs cut to length
- Stock sheets. Fixed lengths for sheds, carports, porches and patches. Easy to haul, but on a house they force horizontal laps that can leak on lower slopes.
- Cut to length. Metal suppliers roll panels to your exact measurements, so each sheet runs eave to ridge in one piece. This is how residential metal roofs are done.
Gauge and thickness
- 29 gauge. Thinnest and least expensive, common on exposed fastener panels. Dents more easily in hail.
- 26 gauge. Thicker and stiffer, a frequent upgrade on homes.
- 24 gauge. Heavier, common for standing seam, with better dent resistance.
Lower gauge numbers mean thicker steel. In hail-prone North Georgia, a heavier gauge is worth pricing.
How to order the right size
- Measure each slope from eave to ridge along the slope, not from a floor plan, and add any overhang the profile calls for.
- Measure the width of each slope and divide by the panel's coverage width, not its full sheet width.
- List trim separately: ridge cap, eave, rake, valleys, sidewall and endwall flashing, plus closures and fasteners.
- Have the supplier or installer check the cut list, because a short panel cannot be stretched.
For the full picture, read metal roofing in Georgia and how roofers measure a roof.