Modified Bitumen

Telus Space Centre – Edmonton, ABModified bitumen systems combine the advantages of built-up roofing with the ease of application of a single-ply system. Bitumen is reinforced with fibreglass or polyester for added durability, and manufactured into sheets or rolls for ease of application. One, two (most common), or three ply-systems are available.

There are two kinds of modified bitumen systems:

  • SBS (Styrene Butadiene Styrene) systems are usually installed with hot asphalts or cold adhesives.
  • APP (Atactic Polypropylene) systems in almost every case are installed using the torch method.

The advantages of these systems are:

  • Durable in extreme weather conditions
  • Easy to repair
  • Come in rolls for ease of application
  • Factory-manufactured to ensure quality control
  • Expand or contract with the movement of the building
  • Variety of surfaces that resist oxidation and damage from UV rays.