Modified Bitumen Roof

What is a Modified Bitumen Roofing System?

 Asphalt has been a cornerstone in roofing for many years, trusted for both residential and commercial applications. Its key feature is the use of asphalt as a waterproofing membrane, providing reliable protection against water ingress.

Worker applies bitumen mastic on the foundation
modified bitumen 3

Different Methods of Installing
Modified Bitumen Roofing

Hot Mopped Method

  • Traditional Technique: Involves melting asphalt in a kettle and applying it to the roof with mops.
  • Ideal For: Those looking for time-tested, conventional roofing installation methods.

Heat Weld/Torch Application

  • Modern Approach: Utilizes a torch to melt the asphalt on the underside of the membrane for adhesion to the roof’s substrate.
  • Benefits: Ensures a secure and uniform bond between the roofing layers.

Cold-Applied Method

  • Adhesive-Based Installation: Involves applying a liquid adhesive with tools like a notched squeegee or an applicator gun, allowing the membrane to stick to the substrate or existing roofing layer.
  • Advantages: No need for heat, making it a safer and more environment-friendly option.

Self-Adhered Method

  • Innovative and Efficient: Involves rolling out a membrane and peeling back a film to adhere the membrane to the roof.
  • Key Features: Faster installation, no unpleasant odors, and growing in popularity due to its ease of use.


  • Durable Construction: Made with a granular surface layer applied under controlled factory conditions, ensuring uniform quality and enhanced longevity.
  • Cost-Effective: The durability of modified bitumen roofing reduces the need for frequent repairs, saving money over time.

Simplified Process: Despite the need for safety measures during installation (like when using a torch), these systems are relatively straightforward to install, potentially reducing labor costs and minimizing disruption.

  • Seamless Design: The overlapping roll structure results in larger seamless areas, significantly lowering the risk of leaks.
  • Expert Installation: Professional installation ensures that the joints are properly sealed for maximum protection.
  • Strong Attachment: The base sheet is mechanically fastened to the building’s sheathing, providing effective resistance to wind uplift.
  • Weather Adaptability: With polymer-reinforced layers, modified bitumen roofing remains elastic and flexible in cold climates, preventing cracking or breaking.
  • Recyclable Materials: At the end of their lifespan, these materials can be recycled, reducing landfill waste.
  • Sustainable Choice: While no roofing material is entirely green, the durability and recyclability of modified bitumen make it an environmentally conscious option.

Choose SNS Roofing for Your Modified Bitumen Roofing Needs: We understand the importance of a quality roof. Our expertise in modified bitumen roofing ensures that your building benefits from these key advantages, providing a durable, efficient, and eco-friendly roofing solution. Contact us today!

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