Built-up Roofing Systems

Built-up asphalt and coal-tar bituminous roof systems are the tried-and-true historic standards in low-slope roof applications. Multiple plies, or layers, are applied with hot bitumen to achieve a highly durable roof assembly. Coal tar and asphalt are heated in a kettle. Then they are applied via mop or mechanical spreader. Asphalt roof systems are highly durable, and coal-tar pitch systems are somewhat self-healing in nature due to their low melting point.

Kalkreuth Roofing can assist in determining the type of built-up system best suited for your situation. We can also install both self-adhered and fully-adhered vapor barriers under any of our roofing systems.

Built-Up Roofing Systems

Built-up roofing systems are available in various thicknesses, finishes and number of plies. The top layer is often gravel surfaced, or may be smooth with a liquid coating.   Most built-up systems are relatively easy to repair with common cement. Warranties are available from 10 to 20 years.


  • Highly durable – multiple plies/layers of material in hot bitumen which is water resistant
  • Wide variety of standard finish textures and colors of gravel
  • Can be phased on new-construction projects so that the top layer is the final stage
  • Coal-tar bituminous roofs are able to withstand ponding water


  • Asphalt or Coal-tar
  • Various thicknesses and strengths of plies
  • Gravel or smooth finish
  • Multiple color options depending on type of finish


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