Book updated October 2020. A commercial roofing contractor's work includes installation, renovation, remodeling, reroofing, reconstructing, repair, maintenance, improvement, alteration, and waterproofing of building roofs using a variety of materials, including shingles, asphalt, and metal. The knowledge covered in this exam include 1. General Roofing Knowledge2. Low Slope Roofing3. Steep Slope Roofing4. Architectural Metal Roofing Systems and Sheet Metal Flashing5. Moisture and Energy Control6. Repairs and Reroofing7. SafetyEven though there are code related questions that are state specific, technical questions are always based on the NRCA recommendations! And you need to know the safety requirements too. We create these supplemental self-practice test questions module referencing the principles and concepts currently valid in the corresponding trade. Each question comes with an answer and a short explanation which aids you in seeking further study information. These questions are intended as supplementary study material for fundamental knowledge establishment. They are NOT actual past-paper questions. You should use this product together with other study resources for the best possible exam prep coverage.