Roofing contractors put on & usually require formal education, however they require on-the-job experience to learn their trade. While each state has different licensing guidelines, many require a roofer to have at least two years of experience prior to they can end up being licensed. These professionals also need liability insurance, to be bonded and to possess a service license. HomeAdvisor can assist you discover the right roofer for your task. While each state has different licensing guidelines, many require a roof contractor to have at least two years of experience prior to they can end up being certified. These experts likewise need liability insurance, to be bonded and to possess a company license.