According to the Environmental Protection Agency, single-ply roofing is either a flexible or semi-flexible membrane usually made of rubber or plastic. It comes in rolls and may be fastened to a roof using glue or a mechanical process. Certification exams ask questions on this process.
RRO examination questions are drawn from a wide range of study materials. A short list includes the Asphalt Roofing Manufacturers Association's (ARMA's) "Residential Asphalt Roofing Manual," RCI's "Roof Top Quality Assurance Manual" and the Metal Building Manufacturers Association's (MBMA's) "Metal Roofing Design Guide."
As of February 2011, the cost of the application and examination is $250 for RCI members and $375 for non-RCI members. Annual renewals cost $75 for RCI members and $125 for non-members. Late applications incur a $100 charge (members) and $125 charge (non-members).