Once you've identified at most three qualified roofers, it is time to start looking into each one. Check the contact information for each business. Next, make sure that all businesses are insured and licensed. You can check with your local chamber of commerce and BBB to make sure there are no red flags. Lastly, search for reports on contractor assessment sites.
After narrowing down the field of potential contractors, invite them to visit your home to discuss the job. The scope of the project will include discussion about roofing materials, as well as the amount of work required. Also make sure to ask about the necessary manpower and time. Watch out for the contractor. He should be enthusiastic, competent, and professional. While you will be dealing with an authority in materials and methods don't allow yourself to be discouraged from participating in the decisionmaking process. Ask lots and get as many questions as you can before the representative leaves. Also, be sure to compile a list with references that you will need to verify.
The contract must be signed and signed before you can start working. Be sure to include all safety procedures and liabilities, as well workers' comp. The contract should also contain details about payment amounts, clean-up methods and the schedule. For protection against claims that could result from the roofer not paying a vendor for materials, consider requesting a lien waiver.