A flat or low sloped roof made up of layers of asphalt and ply sheets. (AKA BUR)
(BUR) A continuous, semi-flexible membrane consisting of plies of saturated felts, coated felts, fabrics or mats assembled in place with alternate layers of asphalt, and surfaced with mineral aggregate, bituminous materials, a granule surfaced sheet or some type of liquid coating.
A continuous, semi-flexible membrane consisting of plies of saturated felts, coated felts, fabrics or mats assembled in place with alternate layers of bitumen and surfaced with mineral aggregate, bituminous material or a granule surfaced sheet, commonly abbreviated BUR.
A built-up roofing consists of plies or layers of roofing felt bonded together on site with hot bitumen. A protective surface coating of gravel or slag is sometimes embedded in a heavy top coating of hot bitumen. It is laid down to conform to the roof deck, and to protect all angles formed by the roof deck with projecting surfaces, and forms a single-unit flexible waterproofed membrane fastened to the deck by cementing and nailing. The simple principle on flat roofs is to turn the membrane up to form a skirting or base flashing on the vertical surfaces, making a large watertight tray. The only outlets from this tray are the roof drains to dispose of water. French (Couverture multicouches)
An outer covering of a flat roof, consisting of several layers of saturated felt. As laid, each layer is mopped with hot tar or asphalt. The top layer is finished with a mineral or rock covering and a special coating.
A roof covering made up of alternating layers of tar and asphaltic materials.
An outer covering of a comparatively flat roof, consisting of several layers of saturated and/or saturated-and-coated felt, each layer mopped with hot tar or asphalt as laid. The top layer is finished with a mineral or rock covering or with a special coating.
A roof consisting of multiple layers of asphalt and ply sheets.
A system of asphalt-impregnated felt plies sealed and surfaced with hot mopping-grade asphalt. BUR is primarily used in low-slope commercial roofing. The felt plies can be organic (e.g., cellulose), fibrous screen or mat, or polyester fabric