BUR systems using asphalt have the longest performance record of any roofing system and roofing crews have the most experience in BUR application.
In recent years, concern about the use of asphalt in roofing applications has been discussed and debated. The fact remains that BUR systems using asphalt have the longest performance record of any roofing system and roofing crews have the most experience in BUR application. BUR is a durable system that repairs well and is cost effective to apply. Because of its longevity, maintenance crews understand the system and are able to make minor repairs and modifications. In addition, the newer modified-bitumen systems, which also can utilize mopping asphalt for their application, are proving to be excellent performers. With the new technology available to reduce asphalt fumes and the ability to cold apply asphalt, many of the concerns are eliminated.
A keg of asphalt comes from the refinery with the EVT temperature printed on the label. The kettle is heated so that the asphalt is controlled to the EVT temperature + 25 F at the point of application. The operator also needs to take into consideration the ambient temperature, wind conditions and type of surface to which the asphalt is being applied.