SB-10: The Envelope Ultimatum
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Scott Armstrong Design considerations in achieving SB-10 – high performance enclosures, analyzing systems, delivering quality, and verifying performance
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SB-10: The Envelope Ultimatum
- 1. SB-10 – THE ENVELOPE ULTIMATUM Green Building Festival 12 October 2012
- 2. Energy Efficient Enclosures & SB-10 SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 3. Why does it matter? • 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 it matter? 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 it matter? $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
- 6. Enclosure Failure Energy & Durability SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 7. Enclosure Failure Indoor Environmental Quality SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 8. Energy Code Trends SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 9. Achieving SB-10 SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 10. OBC and SB-10 Design Considerations • 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
- 12. Achieving SB-10 Solid Opaque Walls SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 13. Achieving SB-10 Fenestration SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 14. OBC and SB-10 Design Considerations • 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
- 15. Accurate Performance Prediction (Energy Modeling that Works) SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 16. Energy Modeling That Works SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 17. Energy Modeling That Works SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 18. High Performance Enclosures SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 19. High-Performance Enclosures Building-Integrated PV SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 20. High-Performance Enclosures External Shading SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 21. High-Performance Enclosures Vegetated Green Walls SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 22. Analyzing Systems Fenestration © Kawneer.com SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 23. Delivering Quality Enclosure Commissioning SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 24. Verifying Performance Enclosure Commissioning SB-10 – THE ENVELOPE ULTIMATUM | 12 OCT 2012
- 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