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Understanding NFPA 285: Harmonizing Fire Performance and Energy Efficiency in Exterior Wall Assemblies

Posted By Nathan Pobre, Wednesday, May 23, 2018

Commercial building codes have been modified to require the construction of more energy-efficient buildings. Improvements to the building envelope, using continuous insulation solutions incorporating polyisocyanurate (or Polyiso) insulation, have played a major role in mainstreaming high-performance construction practices. To meet the demands of today’s buildings, architectural and design professionals must balance energy efficiency with whole building performance considerations, including fire safety. All construction materials, including foam plastics materials such as polyiso insulation, must provide a suitable margin of fire safety. The National Fire Protection Association (NFPA) 285 fire test is a large-scale wall assembly test used to determine the potential for flame spread from one story of a building to another through the exterior wall. With respect to wall assemblies in Type I-IV Construction, understanding and properly implementing NFPA 285 is a critical component for designing a compliant, high-performance building envelope.  

To learn more about NFPA 285, check out this free webinar which can help you:
1.    Understand the development history of the NFPA 285 standard fire test procedure for exterior wall assemblies containing combustible materials.
2.    Identify the NFPA 285 related requirements in the 2012 and 2015 editions of the International Building Code.
3.    Explain how engineering analysis of NFPA 285 test assemblies may be used to specify alternative materials.  
4.    Determine how Polyiso insulation can be used as an integral component of NFPA 285 tested and compliant wall assemblies.

Tags:  building codes  buildings  energy efficiency  insulation  NFPA 285  Polyiso  Type I-IV  walls 

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Polyiso’s Trusted Fire Performance Brings Benefits to Wall Market

Posted By Nathan Pobre, Thursday, May 17, 2018

Polyiso roof insulation has long been championed by the construction industry for its excellent fire and thermal performance. As the most widely used insulation product for low-slope commercials roofs, polyiso remains the only foam plastic insulation product for direct application to steel decks to earn FM Approval for Class 1 Roof System. Polyiso’s inherent fire resistance characteristics are due to its unique structure of strong isocyanate chemical bonds. This produces a versatile product that roofing contractors have come to rely on for all types of roof systems.

The same physical properties that make polyiso a top choice for roofs also make the product an excellent option for continuous insulation applications for both commercial and residential walls. Thousands of exterior wall assemblies with polyiso insulation meet the stringent NFPA 285 test standard. This enables polyiso insulation to be used in buildings of any type and any height. And offers design professional flexibility to combine polyiso with a wide variety of other wall components to construct attractive and resilient building envelopes.  

Polyiso wall insulation products also share the roofing products’ characteristic for high thermal resistance. Packing more R-value into every inch of product allows architects to reduce the thickness of wall assemblies. This creates advantages for the installation process and also can reduce the cost of other components like fastener and attachment systems. Furthermore, polyiso products can also serve as air, moisture and weather barriers in wall assemblies.  

Whether you are designing roofs or walls, polyiso insulation products check all the boxes for fire and thermal performance and overall versatility.

The following resources provide additional information on polyiso insulation’s excellent fire performance:

Tags:  fire performance  insulation  polyiso  r-value  walls 

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