A: Roof installation typically follows a specific sequence. First, the old roofing materials are removed if necessary. Next, the roof deck is inspected and repaired as needed. Afterward, underlayment, drip edge, and flashing are installed to create a watertight barrier. Then, the roofing material, whether shingles, metal, or another type, is applied from the bottom up, overlapping each row. Finally, ridge vents and other ventilation components are installed to ensure proper airflow.