This type of roofing system typically last around 10-15 years

Modified is also referred to as tar and gravel roofing systems

What is Modified roofing?

Modified bitumen is a type of asphalt product that can be applied in a number of ways to the roof in both hot and cold temperatures. Modified bitumen roofs have a lot of advantages over other types of membrane roofing, and are often seen as the modern alternative to the built up roof.