How to Select the Proper Gauge Metal Barn Roofing

Gather data about the local climate. Find the average wind speed and the typical amount of snow during the winter. Check the county and local building codes for roofing information. A harsh or windy climate may require a thicker metal roof. Metal barn roofing is usually available in 26 and 29 gauge styles. 26-gauge metal roofing is .001 to .004 inches thicker than 29-gauge roofing.

Buy 26-gauge roofing if a stiffer and more easy-to-handle metal is desired. The thicker metal has a lower chance of getting dents during handling and it's less likely that the edges and corners will bend. Screws or nails with gaskets attach the metal roof to the top of the barn. The 26-gauge roofing tends to tear and pucker less than thinner metal when the screws or nails are inserted.

Purchase 29-gauge metal roofing to save money. A 29-gauge metal is lighter than 26-gauge metal roofing and often isn’t as strong or durable. Examine the coating or paint on the metal roofing. Non-coated steel will eventually rust but it has a lower price. Galvalume metal roofing has an aluminum-zinc alloy coating to resist corrosion and increase durability. Metal roofing has a wide variety of paint colors to complement the barn color.

Contact roofing supply dealers to determine the availability of thicker metal roofing. A 24-gauge or lower galvanized steel is standard for residential metal roofing but may not be necessary for barns. In areas with severe weather and high winds, 24-gauge metal roofing might be useful. The sheets of metal roofing are produced in 24- and 36-inch widths. The corrugated steel usually has a U or V crimp.