Sometimes referred to as tar and gravel roofing, built-up roofing provides your property with a reliable roof that normally requires low-cost maintenance. Built-up roofing is normally composed of laminated layers of bitumen and fabrics for reinforcement to create a tough membrane that covers the roof. Normally, the membrane layer is covered or coated with tar or some other adhesive and gravel.
The main thing that attracts building owners and managers to the built-up roofing system is that they tend to be hassle free. You are getting a very reliable and durable roof which can last for 40 or more years if properly maintained. In addition, the maintenance and life cost will be low. While other systems certainly have plenty of advantages, many still choose to go with the tried and true option.