A commercial roof is only a part of a building, but it protects 100% of it, so you should treat it responsibly; this starts with finding good professional roofers in Dallas for any service that you need: installation, periodic maintenance or repairs.
There are many commercial roofers out there, but you should do your research and find the one that is best equipped to meet your particular needs.
Contact various roofing companies, talk about their recent completed work, see their portfolios and ask them for references (previous clients that you can contact and ask about their level of customer satisfaction while working with that particular roofer ). If a contractor seems too pushy to make you sign a contract, or you feel that you do not get enough attention and assistance, move on to another company. Do not make compromises, because your roof is too important.
Even if the roof is leaking, stay calm and do not sign a contract just for the sake of dealing with this as soon as possible. Do not pick the first option that you find!
A reliable professional roofer should have a long experience in the roofing business, be licensed, certified and insured, so don`t forget to ask about proof of their credentials. You need a contractor with good communication skills and willing to stand behind its work by offering warranties for materials and labor. Finally yet importantly, get everything in writing!