You can research a roofing contractor by checking their customer service record. Here's how: Search Google for 'company name + complaints' and 'company name + customer reviews'.  If there are any unhappy customers, you'll find them here.  And don't forget the Better Business Bureau. Get the roofing contractor's phone number and address, then call the BBB or search Google for, 'company name BBB complaints' to check if any complaints are filed against them and if they have been resolved.