Look for a company that will take care of all phases of your home improvement project. Choose a company that has been in business for a long time and has a solid reputation. Check for a permanent place of business, telephone number, business license, and tax number. Check to see if your contractor has proof of insurance and liability coverage. You installer needs to be properly licensed. Choose a company that warranties their work. Don't be afraid to ask questions about the background of the company, and concerning the crew who will be working on your home improvement project.