Although NFPA 285 has been part of the building code since 2000, there are still misunderstandings as to how materials and assemblies meet its requirements. This course reviews the types of continuous insulation (CI) options and discusses the advantages and challenges of several CI assemblies that pass NFPA 285.
Ponding water on a low-sloped roof can greatly reduce the performance and lifespan of the roof membrane. Tapered roof insulation systems reduce or eliminate ponding water when a roof deck does not provide adequate slope. This course describes the benefits of tapered polyisocyanurate insulation and discusses the profiles, panel repeats, and design options available. Also addressed are cricket installation guidelines, tapered roof system average R-values, and specification tips.
This course will focus on the changing energy codes and how they affect commercial wall assemblies. The new concept of continuous insulation (CI)—and how it is used throughout the codes—will be discussed. The NFPA 285 fire test and its role in code-compliant wall assemblies will also be discussed for commercial building types I–IV. The thermal performance, physical properties, and compliance attributes of polyisocyanurate insulation will be explained, as well as how it compares with some of the other insulation options available.
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