Bituminous Roofing Membranes

Bituminous roofing membranes represent a major portion of today's roofing and have a strong record of reliability. JM offers over 150 years of experience with these systems. There are two major types of bituminous roofing systems.

Built-Up Roofing System (BUR)

With built-up roofing systems, the waterproof membrane is field-fabricated with layers of bitumen alternating with plies of reinforcing felts and appropriate protective surfacing. The reliability of BUR is enhanced by the redundancy of the plied-in layers of roofing felts.

Modified Bitumen Roofing

By modifying premium-grade asphalts, JM has developed formulations that enhance the asphalt's overall weatherability. By combining these modified asphalts with nonwoven polyester or fiber glass reinforcements, JM produces waterproofing systems that exhibit tremendous strength, elasticity and weatherability. The systems feature either APP modified bitumen roofing or SBS modified bitumen roofing membranes.

Find the recommended cover board for your next JM project in minutes.
Invinsa® Roof Board is an integral component in a Johns Manville single ply roof system, as well as in cold-applied and self-adhered bituminous roofing systems. This lightweight board optimizes the long term performance and longevity of the roof. Its reduced weight provides labor and installation savings, including easy hoisting and maneuvering around the roof. Easy scoring and cutting allow for tight fabrications around roof penetrations.
A unique self-adhering technology allows JMCleanBond™ SBS to be installed without the need for hot asphalt or heat welding. This makes it an excellent re-roofing choice, because it is faster, cleaner and creates minimal disruption for building occupants.
Unusual penetrations or roof details are no problem for PermaFlash. The liquid-applied, two-part system has a pliable polyester scrim that can accommodate any shape as the reinforcing substrate for the MBR® Flashing Cement. PermaFlash is easily installed in a wide temperature range and features great tensile strength, minimal odor release, enhanced workability and a low cost per penetration.
Our proprietary blend of atactic polypropylene (APP) polymer and high–quality asphalt is reinforced by our tough non–woven polyester mat. It 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.
What do you get when you use a 150+ year-old company with a 25 year heritage in SBS? The brand that's most preferred by roof consultants and architects. Download the information below to learn more.
JM created the first Built-Up Roofing system in America. While other manufacturers dabble when it's convenient. With 150+ year heritage in BUR as a core business, JM has established the commercial roofing industry standard. Download the information below to learn how our history can help your future projects.
With our products listed and tested in over 200,000 UL and FM assemblies, we have the depth and breadth to offer what is best for your roof. Download the information below to learn why JM SBS systems solve a multitude of roofing challenges.

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