You should always find a contractor who is willing to provide you with an estimate before starting to work. An estimate will let you know what you're getting yourself into before you make any commitments. You don't want to commit to a contractor and then find out later that you're going to be paying an astronomical fee.

Try to find online reviews for the contractor before you make a hiring decision. Composite roofing can be difficult to install and you need to make sure you're hiring someone with the necessary skills to do it. These reviews will also tell you a lot about the professionalism of your contractor. In the end, finding reviews online could save you a lot of time and money by directing you away from bad contractors.

Write out a simple short-form contract for the contractor. In the contract, you should go over the payment terms you have agreed to, the amount of work to be completed, and any estimates the contractor has offered you. If the contractor has offered you some kind of work guarantee, then you should put that in the contract as well.