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SB-10: The Envelope Ultimatum
The document discusses SB-10, focusing on energy-efficient building envelopes and their importance in construction, performance standards, and compliance with energy codes. It emphasizes the integration of building envelopes with HVAC systems, the potential costs of envelope failures, and the need for accurate energy modeling to achieve high-performance enclosures. Additionally, it outlines design considerations for compliance with ASHRAE standards and provides technical specifications for various building envelope components.
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SB-10: The Envelope Ultimatum
- 1. SB-10 – THEENVELOPE ULTIMATUM Green Building Festival 12 October 2012
- 2. Energy Efficient Enclosures &SB-10 SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 3. Why does itmatter? • Codes demand it • Substantial portion of construction budget – 20% range • Integration with HVAC requires that the building envelope perform • Sustainable buildings often incorporate innovative assemblies and materials • Envelope failure can require costly repairs to re-establish the design intent • Envelopes are complex systems with shared responsibilities and are not typically commissioned SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 4. Why does itmatter? 12 10 Performance Gap 8 6 Mechanical Envelope Extract from NCBC 2010 Seminar “Successful Exterior Enclosure Commissioning” 4 2 0 1 2 SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 5. Why does itmatter? $90,000.00 $80,000.00 $70,000.00 $60,000.00 $50,000.00 $40,000.00 $30,000.00 $20,000.00 $10,000.00 $- 1 2 3 4 5 6 7 8 9 10 Code Building based on 3% annual inflation 25% Better over 10 years SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
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- 10. OBC and SB-10 DesignConsiderations • Meet ASHRAE 90.1-2010 + SB-10 Envelope Values (i.e. ASHRAE 189) Prescriptive • Exceed ASHRAE 90.1-2010 by minimum 5% Modeled • Exceed MNECB (1997) by minimum 25% Modeled • 40% maximum fenestration-to-wall ratio LEED NC 2009 prerequisite equivalent SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 11. SB-10 Envelope Values Zone Comparison Zone 5 6 7 Max U-value Min. R-Value Max U-value Min. R-Value Max U-value Min. R-Value 2 2 2 Assembly (w/m K) (w/m K) (w/m K) Roof 0.22 R-25 ci 0.18 R-30 ci 0.16 R-35 ci Mass Walls 0.45 R-13.3 ci 0.40 R-15.2 ci 0.34 R-20 ci Metal Building 0.30 R-13 + R-13 ci 0.30 R-13 + R-13 ci 0.30 R-13 + R-13 ci Steel Framed 0.31 R-13 + R-10 ci 0.31 R-13 + R-13 ci 0.31 R-13 + R-10 ci Metal framed 1.99 0.35 SHGC 1.99 0.40 SHGC 1.70 0.45 SHGC fenestration (max 40%) SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
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- 14. OBC and SB-10 DesignConsiderations • Meet ASHRAE 90.1-2010 + SB-10 Envelope Values (i.e. ASHRAE 189) Prescriptive • Exceed ASHRAE 90.1-2010 by minimum 5% Modeled • Exceed MNECB (1997) by minimum 25% Modeled • 40% maximum fenestration-to-wall ratio LEED NC 2009 prerequisite equivalent SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
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- 22. Analyzing Systems Fenestration © Kawneer.com SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
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- 25. Scott R Armstrong Dipl. Arch. Tech., A.Sc.T., LEED AP BD+C Manager, Building Science & Sustainability Associate MMM Group Limited 100 Commerce Valley Drive West Thornhill ON L3T 0A1 ArmstrongS@mmm.ca | m: 647.923.9053 | t: 905.882.4211 xt. 6864 | www.mmm.ca SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 26. Communities Transportation Buildings Infrastructure PROJECT EXPERTISE & RESOURCES Green Buildings & LEED Building Science Consulting SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012