How to Chose the Best Roofing Contractor In choosing an excellent roofing contractors san antonio, there are three ways to consider. First is to evaluate their qualifications. Do not hire any contractor that is not insured and licensed. The second way of identifying the perfect roofing contractor is to ask about their workmanship. Each one of these must have a systematic plan not only to fix your roof, but to achieve this using the utmost speed and safety.