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What is Built-Up Roofing?

Built-up roofing (BUR), often called "tar and gravel" roofing, is one of the oldest and most reliable commercial roofing systems. It consists of alternating layers of bitumen (asphalt or coal tar) and reinforcing fabrics, topped with a protective surface of gravel, mineral cap sheets, or reflective coatings. This time-tested system provides exceptional waterproofing and durability for large flat roofs.

Multi-Ply Redundancy

Multiple layers of bitumen and reinforcing fabric provide exceptional waterproofing

Time-Tested Performance

Over 100 years of proven reliability on commercial flat roofs

20-30 Year Lifespan

Long-lasting protection with proper installation and maintenance

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