When applied to flat or low-sloped roofs, tar and gravel roofing is a long-lasting, low-maintenance roofing method. It offers superior waterproofing and insulation since it is made up of several layers of tar or asphalt and is covered with gravel. In some conditions, this form of roofing is perfect for residences or commercial structures and is reasonably priced. https://managemyroof.com/tar-and-gravel-roof/