Built-Up Roofing (BUR) is one of the oldest and most durable systems available.
Its multiple layers provide extra protection and perform well in extreme weather conditions.
Built-Up Roofing Systems consist of three components:
Bitumen (asphalt or coal tars) provides the water proofing and adhesion.
Reinforcement with Ply Sheets (felts) provides tear strength, puncture resistance, multiple layers of waterproofing, span caps in the substrate and improve fire ratings.
Layers or plies of roofing felts are laid between asphalt or bitumen. The surface of the roof can have a gravel application, or a mineral cap sheet.



BUR surfacing materials can be coated to reduce UV radiation.
These coatings provide the additional benefit of protecting the roof system from premature aging as well as reducing building interior cooling and heating costs.