The first thing you should do is make sure that the contractor has the right type of molding or trim to match what you already have. Not all contractors carry the same types of molding materials, meaning one section of your molding would be different from the rest. To keep things looking nice, always use uniform trim and molding.

You should also ask for a quote in writing for the repair job. Having everything in writing is the best way to get moving on these projects in a fast and efficient time frame.

You can further expand upon this by setting up a contract with the contractor that clearly states the estimated costs of the project. The contract should also state the way new costs are going to be cleared. For example, you may not want to give the contractor the freedom to just get whatever they think they need for the job. This could end up costing you a lot of money on things that you may not have even wanted to get in the first place.