When most people think of roofing, they usually think of metal roofing or shingles. However, some people may not be aware that there is a protective layer on top and directly below the roof, which plays a vital role in protecting your home from damage caused by the humidity. This is called a roof underlayment. There are two main types of roof underlayment: felt and synthetic. Learn more about this important part of the roof structure. During the California Gold Rush, prospectors covered the roofs of temporary shacks with felt, also known as felt or tar. The roofing felt has […]