The roofing industry, like every industry, changes over time, and the market accommodates those changes. One of the most notable changes has been the ongoing market share decline of built-up roofing, previously one of the most commonly installed roof systems.
Built-up roof (BUR) systems are composed of alternating layers of bitumen and reinforcing fabrics, creating a monolithic membrane with little chance of developing roof leaks. They have been installed in the U.S. for more than 100 years—some say thousands of years—and proved to be dependable.
However, despite their long track record and myriad benefits, BUR systems have been losing significant market share during the past decade. They currently represent about 20 percent of the roofing market, down from 45.7 percent in 2000.
BUR versus single-ply