Continuous Insulation: Code Compliance and the NFPA 285 in ... · NFPA 285 and Engineering...
Transcript of Continuous Insulation: Code Compliance and the NFPA 285 in ... · NFPA 285 and Engineering...
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Hunter Panels Provider No. K169 Course Number HP 105
Continuous Insulation: Code Compliance and the NFPA 285
in Commercial Wall Assemblies
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AIA Continuing Education
• Hunter Panels, is a Registered Provider with the American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-AIA members are available on request.
• This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using distributing or dealing in any material or product.
• Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
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Copyright Materials
This presentation is protected by US and International copyright laws. Reproduction, distribution, display and use of the presentation without written permission of the publisher is prohibited.
Copyright ©2014 Hunter Panels
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Learning Objectives
• What is the NFPA 285 Fire Test and why is it so important?
• What are common concerns encountered with NFPA 285 assembly design and installation ?
• What are the different types of CI Options that offer NFPA 285 compliance?
• What are the advantages and challenges of CI Board Products in NFPA 285 assemblies?
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What is the NFPA 285 Test?
• Pass Fail Fire Performance System Test
• Measures the performance of wall systems and their components when wrapped in combustible materials
• Required by code(Chapter 14 and 26 IBC)
National Fire Protection Association The authority on fire, electrical, and building safety
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NFPA 285 – what does it look like
• Base Wall Type
• Cavity Insulation • Exterior gypsum
sheathing • Water/vapor barrier • Continuous Insulation
Layer
• Exterior Finish
The Fire Chamber The Assembly Components
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NFPA 285 Pass/Fail Criteria
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NFPA 285 Burn Video
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NFPA 285 Burn Video
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Why is the NFPA 285 Important?
• Building occupant & firefighter safety • CI codes are increasingly being adopted
into state code • Without proper documentation:
• Project could be halted until documentation provided
• One or multiple materials maybe removed or changed
• Building envelope redesign may be required
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NFPA 285 is triggered by MANY Products
• Air and Water Barriers
– Section 1403.5
• Combustible Claddings
– EIFS Section 1408.2
– MCM Section 1407.10
– FRP Section 2612.5
– HPL Section 1509.10
• Foam Plastic Insulation
– Section 2603.5.5
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NFPA 285 and Engineering Evaluations
• Engineering evaluations are unavoidable – Cost
– Infinite material combinations
• IBC Chapter 17 Special Exceptions and Tests – Approved agency can provide affirmation of code compliance of
materials or systems through testing evaluation and reasoned judgment
• Examples of approved agencies – ICC-ES, IAPMO, Intertek, UL, DRJ Engineering, Hughes & Associates,
Priest & Associates and Others
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NFPA 285 Assemblies: Common Issues
• Improper combination of materials
• NFPA 285 and mineral wool
• Metal cladding specified with XPS
• Window and Door details not installed
• Transitions between different claddings
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NFPA 285 Assemblies: Common Issues -Improper combination/order of materials
Metal Panel Cladding
Example:
XPS often specified in assemblies with metal claddings *without gypsum board applied to exterior of insulation
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NFPA 285 Assemblies: Common Issues -Window and Door Header Details
Additional field installation details for XPS (and EPS) are rarely installed to match the passed assemblies.
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Intense fire
exposure occurs at the head
of the opening
NFPA 285 Assemblies: Common Issues -Window and Door Header Details
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NFPA 285 Assemblies: Common Issues– Transitions Between Cladding Types
Need a picture of a building
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NFPA 285 Facts: Misperception
Mineral Wool Boards do not necessarily offer a free pass to the NFPA 285
Many other building envelope products commonly combined with MW trigger the NFPA 285
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NFPA 285 Facts: Overlooked Triggers
MCM and HPL (metal and plastic combustible cladding) require NFPA 285 compliance
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NFPA 285 Facts: Common Areas of Question
• What is compliant and what is not? – Continuously evolving as more tests are conducted – No centralized directory – UL attempting to build a central directory
• Many commonly used exterior components
DO NOT have NFPA compliant assemblies
• Window and door header details are crucial to NFPA 285 compliance with some materials
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What are my exterior CI Options?
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What are my exterior CI Options? Do they offer NFPA 285 Compliance?
Board Insulation
Insulated Claddings
Spray Insulation
EIFS
Insulated Concrete
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CI Options- Polyisocyanurate Boards
Steel Frame Yes, Many
CMU
Yes, Many
Concrete Yes, Many
NFPA 285 Compliant Assemblies
YES, Varies By Manufacturer, Lots of Design Flexibility
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CI Options- Polystyrene Boards-XPS or EPS
NFPA 285 Complaint Assemblies
Yes- Some limitations
Steel Frame
Yes—Can be limited by cladding and may require special fire
protection detailing
CMU Yes—Can be limited by cladding
and may require special fire protection detailing
Concrete Yes—Can be limited by cladding
and may require special fire protection detailing
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CI Options- Mineral Fiber/Slag Wool/Fibrous Boards
NFPA 285 Compliant Assemblies
None- Other components in the wall system may trigger the test
Steel Frame Yes-Many
CMU Yes-Many
Concrete Yes-Many
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CI Options- Spray Foam - SPF
NFPA 285 Compliant
Assemblies Some- May have limitations
Steel Frame Some-Limited assemblies passed
CMU Yes-Limited assemblies passed
Concrete Yes-Limited assemblies passed
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CI Options- Insulated Claddings
NFPA 285 Assemblies
Compliant Yes- Many are proprietary
*Note some insulated claddings are not true continuous insulation
Steel Frame Yes- Many are proprietary
CMU Yes- Many are proprietary
Concrete Yes- Many are proprietary
animations style in slide 2 match for slides 1, 3,4,5
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CI Options- EIFS and Concrete Panels
Concrete Panels & Pre-Cast
NFPA 285 Compliant
Assemblies Yes-Most are proprietary
systems
EIFS
NFPA 285 Compliant Assemblies
Yes- Most are proprietary systems
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What does a typical NFPA 285 compliant wall assembly look like for each of these CI options?
Spray Foam – very limited option
Insulated Metal Panels – different application
PreCast , Concrete Sandwich Panel, Tilt Wall – N/A
Lets discuss the more commonly used board insulations Polyiso, EPS/XPS, Mineral Wool…..
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Common Assembly Comparisons Utilizing Board Insulation
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NFPA 285 Compliant Assembly Steel Stud with Masonry R-10
POLYISO XPS MINERAL WOOL
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NFPA 285 Compliant Assembly Steel Stud with Masonry R-10
POLYISO XPS MINERAL WOOL
XPS 2” Polyiso 1.5” Mineral Wool 2 Layers 1.5” 1”
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NFPA 285 Compliant Assembly Steel Stud with Masonry R-10 – Wall Cavity Width
POLYISO XPS MINERAL WOOL
2” Two Layers 1” 1.5”
1.5”
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Thickest profile Thinnest profile Thicker profile
NFPA 285 Compliant Assembly Maximizing Interior Space/Reducing Concrete Required
POLYISO XPS MINERAL WOOL
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POLYISO XPS MINERAL WOOL
NFPA 285 Compliant Assembly Window and Door Headers
Standard window and door header
Non-Standard window and door header
Standard window and door header
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NFPA 285 Compliant Assembly Steel Stud with Metal Cladding R-19
POLYISO XPS MINERAL WOOL
Minus Gypsum 1.5” Thinner Cavity
Non-Compliant Cavity Thickness 4.5”
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NFPA 285 Compliant Assembly Concrete Masonry Unit with Metal Cladding R-19
POLYISO XPS MINERAL WOOL
Non-Compliant
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NFPA 285 Compliant Assembly Polyiso Moisture Properties and Airflow
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NFPA 285 Compliant Assembly EPS/XPS Moisture Properties and Airflow
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NFPA 285 Compliant Assembly Mineral Wool Moisture Properties and Airflow
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NFPA 285 Compliant Assembly Board Insulation Moisture Properties and Airflow – Placement of WRB
POLYISO XPS MINERAL WOOL
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NFPA 285 Compliant Assembly Attachment Methods
POLYISO XPS MINERAL WOOL
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CI Options and NFPA 285 Recap
Polyiso gives you more design choices on components with proprietary and nonproprietary systems
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Future of the NFPA and the IBC
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Learning Objectives
• What is the NFPA 285 Fire Test and why is it so important?
• What are the common misinterpretations of the NFPA 285 ?
• What are the different types of CI Options that offer NFPA compliance.
• What does a typical NFPA 285 compliant wall assembly look like for each of these CI options, how do they differ?
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Questions?