Roofing contractors wear & normally need formal education, but they require on-the-job experience to learn their trade. While each state has various licensing rules, a lot of require a roofer to have at least 2 years of experience prior to they can become certified. These experts likewise require liability insurance, to be bonded and to possess a service license. HomeAdvisor can assist you find the right roofer for your job. While each state has different licensing guidelines, the majority of require a roofing professional to have at least two years of experience before they can become licensed. These professionals also need liability insurance, to be bonded and to have a business license.