Technical Details: Self Adhered Modified Bitumen Systems
SAMBs have been introduced to counter safety concerns associated with hot bitumen and torch applications and environmental issues surrounding solvent-based cold adhesive applications.
Environmental regulations and insurance requirements are playing an increasing role in determining the types of materials and the methods of application that we will employ in the roofing industry in the near future. An example of this is in the introduction of self-adhered modified bitumen systems (SAMBs). These types of systems have been introduced to counter safety concerns associated with hot bitumen and torch applications and environmental issues surrounding solvent-based cold adhesive applications. Relatively new in the United States, this article will discuss the technology behind these systems.
Another advantage for contractors is the ease of application. No special equipment is required and SAMBs are less labor intensive than many other roof systems. Application is completed in a quick three-step process. The membrane is rolled out over the properly prepared substrate. Once the membrane has been rolled out and adequately relaxed, the SAMB sheets are installed by removing a separator sheet from the roll as the membrane is adhered to the substrate. Subsequent rolls are applied in similar fashion utilizing manufacturer-required overlaps at end laps and seams.