A tar and gravel roof, also known as a built-up roof (BUR), is a traditional flat roofing system commonly used in commercial and residential buildings. It consists of multiple layers of roofing felt alternated with hot tar or asphalt to create a durable, waterproof membrane. Once the layers are built up, a final layer of gravel is spread over the top to protect the tar from the sun's UV rays and to add weight, holding the materials in place. This type of roof is valued for its durability and ability to withstand heavy foot traffic. Visit: https://managemyroof.com/tar-and-gravel-roof/