Commercial Roofing

APP Roofing Systems

Johns Manville has developed formulations that enhance the asphalt's overall weatherability by modifying premium-grade asphalts. By combining these modified asphalts with nonwoven polyester or glass fiber reinforcements, JM produces waterproofing systems that exhibit tremendous strength, elasticity and weatherability.

APP roofing membranes provide superior tensile strength while maintaining critical flexibility, even in the coldest environments. Additionally, with APP roofing membranes (coated with a proprietary blend of asphalt and atactic polypropylene), contractors now have an efficient mode of application by heat welding, making hot mopping unnecessary.

JM is the exclusive source for Dibiten™ APP membrane. This heat-weld-applied modified bitumen membrane is a high-performance solution for both commercial and residential applications. (Dibiten is currently available in the Pacific region.)


Submittal Wizard

JM is making updates to the Submittal Wizard that is available on During this update period, when you click the orange buttons below, you will be redirected to the former submittal wizard enjoyed by our contractors on

Thank you for your patience during this transition. If you have any questions or comments, please submit them to

Submittal Wizard - Cold Applied

Submittal Wizard - Heat Weldable