A roof replacement or a major repairing process is like a long-term commitment. You would probably hire someone you trust for this job. In this big industry, probably it is best for you to hire a local roofing contractor, specialized in residential if you are a homeowner or in the commercial building if you run him payroll.
The main advantage of hiring a local roofing contractor is that is substantially easier to check his work. You can always visit other local homes that he had worked on before. Plus, a local contractor, like this one https://www.interstateroof.com/, usually is familiar with local building codes and styles, which means that he is reliable.
In the event of an emergency, like damages caused by a natural disaster, your safety comes first. You would probably want the roof to be repaired as soon as possible. A local contractor would be able to give you a rapid response and a quick damage rating. Then you go together through the repair and costs plan.
If you want to completely replace the roof, a local roofing contractor would be able to advise you regarding the best choice that you can make. Each area has its own rules ore its own weather condition, and you might need a certain kind of roof, different from the one you have already put your eyes on. Besides, it is important to work with a contractor familiar with the state rules, since the laws may vary not only from to state but from a city to another.