What type of roofing is built-up roofing (BUR)?

Built-up roofing (BUR) is indeed classified as a common roofing system. This type of roofing has been used for many years, characterized by multiple layers of waterproof material that are built up to create a durable and effective roof covering. BUR typically consists of alternating layers of felt or fabric, which are coated with asphalt or a similar waterproofing agent. Its layered composition provides significant protection and longevity, making it a favored choice for flat or low-slope roofs.

The definition as a common roofing system underscores its widespread application and reliability in the roofing industry. Its established history and proven performance in commercial roofing applications are a testament to its efficacy. This applies to many buildings, including warehouses, schools, and large retail spaces, highlighting its importance in roofing solutions.