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Course Description: AEC Daily: Protected Membrane Roof (PMR) Systems for Low-Slope Roof Assemblies
Protected membrane roof (PMR) systems offer many benefits to building owners and provide architects with design options that can maximize the energy efficiency, durability, and performance of a building envelope. This course compares the functional and physical features of PMR systems to conventional low-slope roofing applications and discusses the standard ASCE 7 and its impact on wind uplift design.
Compare the components, characteristics, and cautions of conventional low-slope roofing assemblies to determine their impact on a building’s energy use, safety, and service life.
Explain why a protected membrane roof (PMR) assembly improves the durability and long-term performance of a roof by preserving the insulation’s efficiency and reducing the damaging stresses a roof experiences under temperature changes and physical abuse.
Discuss the importance of proper wind uplift design and wind testing protocols, and review the changes within the latest version of ASCE 7.
Explain why a PMR assembly with concrete-topped insulated roofing panels can eliminate major causes of leaks and roof failures by examining how it protects the waterproofing membrane and insulation from wind, hail, ultraviolet rays, thermal cycling, and physical abuse,.
Identify the four ballast design options for a PMR assembly and discuss how they can contribute to a sustainable design strategy by examining how they reduce rooftop temperatures and the heat island effect.