Roofing Systems

APP Modified Bitumen Roofing System

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

APP 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.

Systems Technical Data

Find all of the technical documentation you need using the links below.

  • Cold Applied: Introduction & Selection - Components - Application
  • Hot Weldable: Introduction & Selection - Components - Application
  • APPeX� 4.5M FR (2CIN-W/2PIN-W)

    The APPeX products provide just the right torch-ability across a wide range of temperature situations and a variety of rooftop conditions. JM APP solutions are known for their ability to remain flexible at low temperatures, resist cracking, blistering, UV damage and oxidation.

    APPeX� 4.5M FR (2CIN-W/2PIN-W)

    John Manville's proprietary blend of atactic polypropylene (APP) polymer and high-quality asphalt, reinforced by their tough non-woven polyester mat, provides this membrane with unsurpassed tensile strength, while maintaining critical flexibility - even in the coldest environments. APPeX resists puncture, tearing and the strains of rooftop traffic and structural movement.

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