Modified Bitumen Roofing Systems

Reliability, endurance, and sustainability make modified bitumen roofing systems among the most popular roofing choices when it comes to protecting residential, commercial, industrial, and institutional structures.

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What is Modified Bitumen Roofing?

Modified Bitumen (MB) roofing is an asphalt-based roofing system designed for structures with low-slope roofs. MB roofing membranes have been used in the US since the mid 1970s.

Residential Roof Repair with Integrity

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5-Layer Modified Bitumen System

Modified bitumen is made from asphalt and modifying polymer blends. The adhesive can be applied cold or hot, making it suitable for a variety of commercial regulations.

ON-DECK-Roofing Modified Bitumen Roofing


Providing thermal resistance and offering temperature stability.

MB Membrane

Composed of copolymer with polyester or fiberglass reinforcement.

Modified Base Sheets

Constructed with fiberglass and coated with MB asphalt.


A extra-strength bonding agent that creates a waterproof barrier.


Increases weather-resistance and shields your roof from UV  rays.

Benefits of Modified Bitumen Roofing:

  • Tear Resistance: A major advantage MB roofing offers over other commercial roofing systems is its tear resistance. The combination of fiberglass and/or polyester reinforcement layers under its surface creates a strong, tear-resistant roofing surface. Additionally, this quality makes MB roofing an ideal choice for low-sloped roofs that sustain high foot traffic or rooftop equipment.
  • Flexibility: Flexible low-slope roofing is impact resistant as well as highly resistant to temperature changes. MB can expand and contract without losing shape or structure. 
  • Energy Efficiency: MB can be installed with a “cool roof” treatment like solar reflectance, resulting in reduced indoor cooling requirements.
  • Waterproof: MB is one of the top-chosen commercial roofing options, as bitumen is naturally waterproof.
Efficient Repair and Maintenance Options: Because MB roofs can be repaired using bitumen patches, the repair process is quick and efficient. Low-slope roofing failures usually occur on seals and flashing. With proper installation and our yearly maintenance package, these issues should be minimized.