Canadian Apartment Investment Conference Existing Building Conundrum - PowerPoint PPT Presentation

Canadian Apartment Investment Conference Existing Building Conundrum September | 2013

Project Expertise & Resources Green Buildings & LEED Building Science Consulting CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Country-Wide Presence Select Corporate Clients CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Select Personal Experience Niagarafallsmarriott.com Architravel.com Theismaili.org Condoblog.minto.com Normandthegang.wordpress.com Urbantoronto.com CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Understanding Thermal Performance CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Energy Efficient Enclosures & SB-10 CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Enclosure Failure Energy & Durability CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Enclosure Failure Indoor Environmental Quality CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

SB-10 Envelope Values Zone Comparison Zone 5 6 7 Max Assembly Min. R-Value Max Assembly Min. R-Value Max Assembly Min. R-Value 2 K) 2 K) 2 K) U (w/m U (w/m U (w/m Assembly 0.22 R-25 ci 0.18 R-30 ci 0.16 R-35 ci Roof (above-deck) 0.45 R-13.3 ci 0.40 R-15.2 ci 0.34 R-20 ci Mass Walls 0.30 R-13 + R-13 ci 0.30 R-13 + R-13 ci 0.30 R-13 + R-13 ci Metal Building 0.31 R-13 + R-10 ci 0.31 R-13 + R-10 ci 0.31 R-13 + R-10 ci Steel Framed Metal framed 1.99 0.35 1.99 0.40 SHGC 1.70 0.45 SHGC fenestration (max Assembly 40%) Max. SHGC ci = continuous insulation (i.e. uninterrupted by framing or other bridging elements Exemption for insulation clips removed from SB-10 2012 requirements (insulation clips must be factored into assembly U-value) CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Understanding Thermal Value Assembly Thermal Value Exterior brick – 4” brick masonry – 8” block Concrete block R2 – R6 – 1” cork – ½” drywall 1” Cork insulation Interior finish Assembly Thermal Value Window wall with spandrel panel R4 – R8 Infill insulation (depending on size) Backpan Interior finish SB-10 target for opaque walls: approx. R15 – R19 CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Window-to-Wall Ratios and Opaque Assembly U-Values CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

Window Load ( Wh/m 2 ) Wall Ratio Low High Variance 30% 43,152 53,026 9,874 (23%) 55% 55,586 74,333 18,747 (34%) 90% 53,922 105,670 51,748 (95%) Notes: • SB- 10 counts spandrel as “steel framed walls” requiring U 0.31 (equivalent to approx. R -18) • Optimal opaque u-values are not achieved with spandrel assemblies • Walls with better (lower) u-values are impacted more by thermal bridging • Lower WWRs benefit from higher solar heat gain • Higher WWRs benefit greatly from lower solar heat gain • Modifying the SHGC can affect total cooling load by 50% CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013

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 CANADIAN APARTMENT INVESTMENT CONFERENCE | SEP 2013