Plywood is a construction material which has characteristics that make it ideal in today's construction market where performance, process and price are main drivers. This guide is intended to help the users of American plywood to derive the maximum benefits from plywood in roof constructions in terms of performance, durability and cost-effectiveness. It provides carefully written information to help users to make the right decisions when specifying, selecting, designing and fabricating roof constructions using plywood. It has been written by BRE, which is the UK authority on construction-related issues, in partnership with APA - The Engineered Wood Association. 28 pages.