Florence Roofer Explains Reasons For Roof Coating If you are worried that your roof might not last as long as you would like, there are a number of solutions that you can try out. A roof coating is one option that could give your roof an extended life. However, only a trained roofing contractor can apply the roof coating. But what exactly is a roof coating and how does it affect your roof? This article will shed light on a specific way of preserving your roof through a protective coating. What is a roof coating? Think of a roof coating as an extra thick layer of paint.