Built-Up roofing Systems (BUR)

The term “Built-up roof” (BUR) is a generic term for roof systems typically containing multiple layers of hot asphalt sandwiched between layers of reinforcing glass roof felts, covered with a final finish layer of asphalt and gravel.

Built-up roof systems have been around in some form or another for almost 200 years. Known as the most traditional roof system, it has a typical life expectancy of 20-40 years. The multiple layer redundancy and tough surfacing make the Built-up roof the most resilient system available.

Along with its reputation comes the price tag. Typically, a complete tear-off with a Built-up roof system installation is the most expensive option available to a building owner. While all roof systems are good roofs if installed properly, the Built-up roof is known as the best, and should last the longest.

BUR Benefits	BUR Drawbacks
• longest track record (200 years) • most resilient surface • multiple layers of waterproofing • excellent wind uplift characteristics • little maintenance required	• cost • odors associated with installation • repairs are sometimes difficult • positive drainage required • tear-off existing roof required