Contact Number

(888) 892-BEST (888) 892-2378 Lic. #: CCC018297

Modified Bitumen Roofing System

modified bitumen

Modified Bitumen (MB) roofing is an asphalt-based, close cousin of the Built-up-Roof (BUR) designed for buildings with low-slope or “flat” roof structures. Engineered modified bitumen roofing membranes originated in Europe in the mid 1960's and have been used successfully in the United States and Canada since approximately 1975. Modified Bitumen Roofing Systems are designed to withstand harsh exposure to extreme environmental elements. With five layers of protection, it’s one of the most trusted flat roofing systems used in the industry today.

The framework for Modified Bitumen Roofing Systems is a five-layer combination of roofing components.

  • Insulation - Used to provide “R” value, or thermal resistance, for temperature stability of the roof system.
  • Modified Base Sheets or Plies
  • Modified Bitumen Membranes - Factory fabricated sheet membrane composed of co-polymer reinforced with polyester or fiberglass
  • Adhesive - Waterproofing material with a bonding agent applied either hot or cold
  • Surfacing - Provides UV protection and weathering resistance

Benefits of Modified Bitumen Roofing
  • Proven track record of performance
  • Superior waterproofing characteristics
  • Broad range of application methods
  • Wide choice of top-surfacing, including “Cool Roofing” options
  • With insulation, provides an even better-performing building component
  • High tensile-strength
  • Available as part of a fire, wind, and/or hail rated roofing system
  • Competitive life-cycle cost
  • Available with flame-free and VOC-free installation
  • Long-term warranties are available with many MB systems


0 Responses

  1. […] contracted our professionals. The project was a success and the skilled roofers installed a Modified Bitumen Roofing System, as well as a Metal Roofing System within 90 days. The project covered 83,000 square feet and has a […]
  2. […] for the project, as supplies needed were scarce. Best Roofing met the challenge, installing a Modified Bitumen roofing system in 45 days over 65,000 square feet. The system has a 20-year warranty, and the clients could not […]
  3. […] Roofing installed a modified bitumen roofing system covering 21,000 square feet. Construction lasted 60 days and came with a 10-year warranty. When […]

Close It