In nations that use bamboo extensively, the flexibility of the material leads to a distinctive curving line into the roof, attribute of Oriental architecture. The roof decking is the layer of plywood or O.S.B. nailed on the trusses or rafters. Roof decking is often 7/16” and comes in four’x8’ sheets. https://villapacri.com/top-roofing-company-in-illinois-expert-roofing-contractors-delivering-quality-and-reliability-across-the-state/