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Allied Roofing Modified  Bitumen

Modified Bitumen

A properly applied modified bitumen roof with its waterproof membrane can be the perfect solution for providing proper roof drainage and keep your building dry inside.

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. 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.

Allied Roofing can handle new low-slope commercial roofing in South Palm Beach County, Fort Lauderdale, and the surrounding areas like Margate, Deerfield Beach and Coral Springs. We’re also adept at repairing existing modified bitumen roofs and re-roofing older low-slope structures.

Benefits of Modified Bitumen Roofing:

  • Polymer modification to asphalts result in greater elongation and the ability to accommodate building movement
  • Ability to manufacture rolls in plants, providing better quality control and quality assurance
  • Versatile application options: hot asphalts, cold adhesives or hot air
  • A variety of modified type and millage are available to better provide resistance against foot traffic and common rooftop abuse when needed
  • Modified Bitumen Roofing Warranties are available in 25-, 20-, 15-, 12-, and 10-year options
  • Low installation costs
  • Modified bitumen roofing can also assist in lowering your building’s use of energy – a major concern during the summer heat of South Florida
  • A good choice if you want a material that can be installed without disrupting the day-to-day activities of your business
  • Used on low slope and flat roofs
  • Lightweight, roofing material weighs approximately 2 lbs. per square foot
  • Durable, high tensile strength, resists splits and tears
  • High resistance to roof-top traffic
  • Easily maintained, can be coated with elastomeric or aluminum paint to reflect UV rays and South Florida’s hot weather conditions

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

Modified Bitumen Roof Systems are available in two types:

    • Styrene Butadiene Styrene (SBS) – typically installed with hot asphalts or cold adhesives
    • Atactic Polypropylene (APP) – is almost always installed utilizing the torch method

    Both Modified Bitumen Roof System types can be surfaced with either factory surfacing ceramic granules or with metallic laminates such as copper or stainless steel. If a capsheet is not utilized, aluminum coatings or white acrylics can be applied to enhance the systems UV and oxidation resistance.