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.