Metal Roofing Gauges: Understand Ideal Gauges for Metal Roofs
Metal roofing panels come in a variety of profiles and thicknesses, which are typically expressed as gauges. However, gauges can be misleading because manufacturers use different sheet thicknesses for the same gauge. Understanding the best gauges for metal roofs can help your customers choose the right panel.
Metal Panel Gauges Deciphered
Metal panel gauges range from 22 gauge (the thickest) to 29-gauge (the thinnest). Each gauge represents a nominal decimal range, meaning a 26-gauge steel panel can range between 0.0179 and 0.0217 inches thick. When ordering inventory, it's essential to look beyond the gauge number to the manufacturer's specifications on metal thickness to ensure you're getting the right quality.
Costs of 26-Gauge Panels vs. 29-Gauge Panels
Thicker panels typically cost more than thinner ones, with a 26-gauge product costing about 15 percent more than a 29-gauge panel with the same profile from the same manufacturer. However, the added cost may only sometimes be worth it, as the importance of added strength depends on the type of building construction and the customer's priorities and location.
When to Choose a Thicker Metal Roofing Gauge
Thicker gauges are ideal for post-frame buildings or pole barns, which lack structural sheathing and require roof and wall panels to span between supporting trusses or purlins. Thicker gauges are also more forgiving of installation errors and can save customers money by requiring fewer supports. Additionally, thicker panels are better for areas with heavy snow loads.
When to Choose a Thinner Metal Roofing Gauge
For residential homes with a layer of plywood or oriented strand board sheathing covered by a weather-resistant barrier, a quality 29-gauge panel is more than adequate. Thicker gauges can make sense for buildings in hail-prone areas, as they are less prone to denting. Ultimately, the best gauge for a metal roof depends on the specific needs and priorities of the customer.
