BUILT UP COMMERCIAL ROOFING

MANUFACTURERS

Firestone, GAF, Koppers, Johns Manville, Siplast, Carlisle, Garland, Derbigum, Versico, Bitec, Tremco, Suprema, Tamko, Owens, Corning

WARRANTIES

10, 15, 20 year

Built-up roofing(BUR) is a layered roofing system.

To begin a BUR project, felt paper is rolled out and embedded in either hot asphalt, coal tar pitch, or cold adhesive (types of bitumen). Then, another roll is laid parallel on top of the first roll and again embedded in asphalt, pitch or adhesive. This process is continued to the edge of the roof. After all of the felts have been laid out, another coating of bitumen will cover the entire roof surface and gravel will be embedded into it. Once completed, you will have built-up a roof of four layers of felt paper and five layers of bitumen.

Built-up roofing can be used in both new construction projects and on existing buildings. BUR systems have low flexibility and are only appropriate on roof decks with minimal movement or where appropriate expansion joints are provided. BUR systems require periodic maintenance to maximize their service life.

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