Spending my early years as a roofer brought to my attention a lot of questions about new roofs, tear offs, leaks, products, etc… The question that presented itself over and over went a little like this: “Is it better to roof over my existing roof system, or should I tear it all off and start new?” Ask three different people and you will probably get three different answers, well maybe two different answers with three different explanations, anyway the math isn’t important. What is important is for you to know how to answer this question yourself.