If you select a roofer you need to find the best one for the safety of your house.
If you choose a roofer that is not properly insured, bonded, and licensed then any problems that occur will come straight to you. You can choose a premier roofing company via http://snowcountryroofing.com/
The 'roofer' can in fact sue you should he fall while on your property and because they are not licensed, who are you going to call if they take off, leaving the job half-finished, or don't bother to show up at all?
Like with most things, finding out about a contractor before they start any work on your home is the key. Look for clearly written proposals, ones that are detailed and thorough, and ones that are easy to understand and straightforward.
Ask for the roofer's credentials and to see his license. Being properly licensed means that tests have been passed to ensure the company knows the local construction codes and laws, knows how to safely work on a roof, and knows which tools and techniques to use.
Make sure they are insured, if they are it means that should a worker get hurt on your property, he will go through the company's insurance and not to your door demanding compensation. And lastly, ask around. See if your neighbors or friends would recommend a particular roofer and ask why.