Roger compares OSB 3 and plywood and gives his opinion on the best option. OSB board vs Plywood (from Champion Timber) OSB board and plywood are both hugely popular sheeting materials used in modern-day property builds. Whether they’re being used in wall sheathing, flooring or roofs, they both have their own particular suitability and also their own downfalls. So which is best to use in your project? OSB board OSB board was introduced in the 70s as an alternative to plywood for load-bearing buil