Can You Provide References?
Any roofing contractor who is worth employing will have at least a couple of people they have worked for in the past who will be willing to give them a good reference. Don't be afraid to ask for references from someone who is going to be undertaking major work on your home. Any roofing contractor without references is either new and inexperienced or has something to hide. Get references even if you don't follow up on them.
Are You Licensed?
Roofing contractors in many states are required to hold an operating license. Be sure to ask to see this license, as without it, the roofer will not be properly insured. If a roofing contractor is not insured, any accidents or injuries incurred by the contractor could end up being paid for out of your pocket. Make sure to see a copy of the contractor's insurance and licensing documents; don't just take his word for it.
What Will the Job Cost?
The cost of roofing work is often the highest priority for homeowners when speaking to a roofing contractor. When negotiating price or discussing work, be sure to ask if there are any extra charges or whether the price you are quoted is the total price. Ask how unforeseen additional work will be charged, and ask to be consulted before extra work is undertaken. Do not let yourself get stuck with a larger than expected bill.
How Long Will the Job Take?
Along with cost, the time the work will take to complete is highly important. The roofing contractor you go with could be the cheapest around but if he takes double the amount of time to do the work as anyone else, maybe that lower price just isn't worth it. Always ask how long the job will take and make sure you will be consulted if something comes up that means the work could take longer.