Roofing contractors wear & typically require official education, but they need on-the-job experience to discover their trade. While each state has different licensing rules, the majority of need a roofing contractor to have at least two years of experience before they can end up being licensed. These experts also need liability insurance coverage, to be bonded and to possess a business license. HomeAdvisor can help you discover the ideal roofing contractor for your project. While each state has different licensing rules, the majority of require a roofing contractor to have at least 2 years of experience before they can end up being certified. These experts also need liability insurance, to be bonded and to have a business license.