24 Gauge "Mega Rib" Metal Roofing is the standard roof decking on all of our steel structures. Mega rib is heavier and structurally stronger than other metal roofing products and does not require a roof decking. Available in 6 standard colors, the KYNAR paint system outperforms other paint or coatings, and offers protection against weathering, fading, and aging. Custom colors are available at an additional charge.