The roof decking would be the layer of plywood or O.S.B. nailed towards the trusses or rafters. Roof decking is usually 7/16” and comes in four’x8’ sheets. For those who’re tearing off previous roofing, the roofer can look for harm that needs to be repaired as soon as the deck https://digitalbizgenius.com/top-5-roofing-contractors-for-joliet-il-expert-services-for-your-home/