Objective 13, Sustainable Design Literacy, is the newest theme on the ExAC, and its reading list looks endless. By our count, about fifteen titles in Appendix 3 of the 2026 ExAC Preparation Guide touch sustainability. You do not need all of them. The ten specific objectives ask you to explain carbon, life cycle assessment and low-energy design, and to describe rating system concepts. In our experience, two short carbon documents, one textbook chapter and one CHOP chapter carry most of that load. This guide from Examitect, an independent ExAC prep platform unaffiliated with the CACB, sorts the list into must know, should know and skim.
| Exam section | Section 3, about 96 multiple-choice and about 6 short-answer questions in three hours |
|---|---|
| Official wording | Preparation Guide, Appendix 1, p.22 |
| Specific objectives | Ten, under 13.1 climate change, 13.2 life cycle analysis and 13.3 design strategies |
| Published sample | Objective 13.2.4, a TEDI question, Appendix 2, p.29 |
| Reference list | Appendix 3, pp.30 to 33 |
The ExAC Framework Document says the objectives were revised as practice and the IAP changed, and that Sustainable Design Literacy was added as a new theme. It sits in Section 3 beside objective 8, the Final Project. The Framework Document also says items are chosen in proportion to the minimum IAP hours in the matching categories, and that the relative weight per theme is published in the annual Statistical and Technical Report, so we do not guess at a question count here.
Appendix 1 of the 2026 Preparation Guide (p.22) sets out the ten specific objectives:
| Specific objective | What it means for your study |
|---|---|
| 13.1.1 Apply predictive climate data | Design for future weather, not historical averages. |
| 13.1.2 Analyze climate change risks (resilience) | Flooding, overheating and power loss, and how a design copes. |
| 13.2.1 Explain the life cycle analysis process | The stages and steps of a whole-building LCA. |
| 13.2.2 Modify an assembly to improve LCA results | Swap a material or layer and predict the effect. |
| 13.2.3 Choose materials that minimize embodied carbon | Concrete, steel, wood and insulation choices. |
| 13.2.4 Explain how operational carbon can be minimized | Cut demand, then supply it cleanly. |
| 13.3.1 Address occupant wellness concerns | Air, light, thermal comfort and sound: WELL territory. |
| 13.3.2 Describe green building rating system concepts | What LEED, WELL and zero carbon programs measure. |
| 13.3.3 Describe renewable and low energy systems | Passive strategies first, then efficient and renewable systems. |
| 13.3.4 Apply a whole building energy analysis | Use modelling results to change the design early. |
Read the verbs. "Explain", "describe", "choose", "modify" and "apply" all ask for judgment about a design. None asks you to list credit names or recite thresholds. Sustainability also reaches beyond objective 13: Section 1 objectives 1.2.6, 2.2.3, 6.1.5 and 7.1.5 and Section 3 objectives 8.1.7 and 8.3.8 all touch it, so this reading pays off twice.
The LCA Practice Guide from the Carbon Leadership Forum (p.9) gives the two definitions the exam builds on. Embodied carbon is the global warming potential attributed to the materials and energy used to construct and maintain a building. Operating carbon is the global warming potential attributed to its operation and use. The CaGBC Zero Carbon Building Design Standard v2 (p.13) adds that, together over the life of the building, they are called whole life carbon.
The term to know cold is upfront carbon: the emissions from life cycle stages A1 to A5, released before the building operates (ZCB v2, pp.15 and 16). Operational savings arrive over decades; upfront carbon is already in the atmosphere on opening day.
The CaGBC Embodied Carbon Primer (pp.4 and 5) shows that the balance depends on the electricity grid. In provinces with low-carbon grids such as British Columbia, Manitoba, Ontario, Quebec, and Newfoundland and Labrador, embodied carbon makes up most of a high-performance building's emissions through 2050. In carbon-intensive grids such as Alberta's, operational carbon is a larger share, though the Primer's Calgary example still has embodied and cumulative operational emissions roughly equal by 2030. Expect the scenario's location to matter.
Operational carbon covers energy use and refrigerant leaks (ZCB v2, p.19), so a heat pump question can turn on refrigerant global warming potential. The Primer (p.9) also names the trade-off examiners like: added insulation lowers thermal demand but adds embodied carbon, and the designer must balance the two.
A whole-building life cycle assessment quantifies the environmental impacts of a building over its whole life. The LCA Practice Guide (p.7) groups the life cycle into four stages, using the module numbers of European Standard EN 15978, which the CaGBC Zero Carbon Building Standard also uses:
| Modules | Stage | What it covers |
|---|---|---|
| A1 to A3 | Product | Raw material supply, transport to the factory, manufacturing |
| A4 to A5 | Construction | Transport to site, construction and installation |
| B1 to B5 | Use (embodied) | Use, maintenance, repair, replacement, refurbishment |
| B6 to B7 | Use (operational) | Operational energy use and operational water use |
| C1 to C4 | End of life | Deconstruction or demolition, transport, waste processing, disposal |
| D | Beyond the system boundary | Reuse, recovery and recycling potential |
The guide's vocabulary is fair game. "Cradle" is the start of the life cycle, "gate" is the factory exit and "grave" is the end, so cradle-to-gate covers A1 to A3 only (p.7). The system boundary defines the physical scope, the life cycle stages included and the impacts evaluated (p.18). Functional equivalence means comparing buildings that do the same job (p.16), and the reference study period is the span of years assessed (p.17). Global warming potential is the headline impact category, alongside acidification, eutrophication, ozone depletion and smog formation (pp.9 and 10).
For 13.2.1, learn the guide's five steps in order: define goal and scope, collect inventory, perform impact assessment, interpret results, and report results. As a worked benchmark, the ZCB Design Standard v2 requires a zero carbon balance over a 60-year life cycle and an LCA covering A1 to A5, B1 to B5 and C1 to C4, with module D reported only as supplementary information (pp.13 and 16).
For 13.2.2, an "improve the assembly" question usually changes one layer and holds the function constant. The RMI report (p.29) lists where reductions come at little or no added cost: optimized concrete mixes, high recycled content rebar, low-carbon insulation, glazing and finishes. Pick the option that cuts embodied carbon without weakening the assembly's job.
Objective 13.3.2 asks you to describe rating system concepts, and 13.3.1 asks about occupant wellness. Those two verbs map neatly onto the two systems Appendix 3 names.
| Question | LEED | WELL |
|---|---|---|
| What it rates | The environmental performance of the building and site | How the building and its operations support human health and well-being |
| Who runs it | USGBC; the CaGBC oversees certification in Canada | The International WELL Building Institute (IWBI), verified by GBCI |
| Structure | Mandatory prerequisites plus optional credits | Mandatory preconditions plus optional optimizations |
| Organized by | Concepts such as Energy and Atmosphere, Materials and Resources and Indoor Environmental Quality | Ten concepts: Air, Water, Nourishment, Light, Movement, Thermal Comfort, Sound, Materials, Mind and Community |
| Objective it serves | 13.3.2 | 13.3.1 and 13.3.2 |
The LEED Core Concepts Guide (pp.93 to 95) calls LEED a third-party green building certification program and lists its concepts: Location and Transportation, Sustainable Sites, Water Efficiency, Energy and Atmosphere, Materials and Resources, Indoor Environmental Quality, Innovation and Regional Priority. The WELL v2 introduction describes research-backed design strategies, operational protocols and policies that advance human health, and IWBI lists the ten concepts in its own comparison of WELL versions.
CHOP Chapter 5.5 supplies the idea examiners can build a question on: a certification target is a client decision, and the criteria published by certifying agencies describe goals, not how to reach them. The CaGBC Zero Carbon Building Standard is a third model: it asks for a carbon balance, not a points total.
Nothing in objective 13 asks for credit values, and the versions move. Appendix 3 lists LEED Canada for New Construction and Major Renovations (2009) and LEED v4 BD+C, while the CaGBC opened LEED v5 registration to Canadian projects in April 2025. Learn the structure, the categories and the difference between the systems. Skip the points.
Lechner's Heating, Cooling, Lighting (Chapter 1) frames low-energy design as three tiers. Tier one is the basic building design: form, insulation, shading and windows. Tier two is passive systems: passive solar, passive cooling and daylighting. Tier three is mechanical and electrical equipment, designed by engineers. Lechner calls tiers one and two the architect's domain, able to cut a building's energy use by as much as 80 percent. When an answer set mixes a form or envelope move with "add equipment" or "add solar panels", the tier-one or tier-two answer is usually the one the question is after.
The BC Energy Step Code Design Guide (pp.12 and 13) gives the strategy list in plain terms: simplify massing, consider orientation, optimize fenestration, increase effective R-values, reduce thermal bridging, increase airtightness and recover heat from ventilation air. It defines thermal energy demand intensity (TEDI) as the annual heating energy needed to keep the interior comfortable, in kWh/m²/year, after passive gains and losses.
The only objective 13 sample in Appendix 2 (p.29) is under 13.2.4. It asks which strategy will decrease a school's TEDI. Three options reverse good practice: a higher window-to-wall ratio, lower airtightness and more thermal bridges. The answer is adding heat recovery, which the ZCB Design Standard (p.29) also names as a strategy with significant impact on TEDI. The pattern is worth remembering: know which way each lever moves demand.
The ZCB Standard (p.29) also says a TEDI target keeps designers focused on minimizing demand before producing or procuring renewable energy. That gives you an order for 13.2.4 and 13.3.3: reduce the load passively, serve it efficiently, then supply it renewably.
For 13.1, CHOP 5.5 quotes the Resilient Design Institute's principle that "simple, passive, and flexible systems are more resilient". Appendix 3 adds the BC Energy Step Code supplement on overheating and air quality, and CSA W204:19 on flood resilient design.
This ranking is ours, built from the objective verbs above. The list itself is the Committee's: every title below appears in Appendix 3 (pp.30 to 33).
| Tier | Reference | Objectives | How to use it |
|---|---|---|---|
| Must know | Embodied Carbon: A Primer for Buildings in Canada (CaGBC) | 13.2.3, 13.2.4 | Read it all; it is short. |
| Must know | Life Cycle Assessment of Buildings: A Practice Guide (Carbon Leadership Forum) | 13.2.1, 13.2.2 | Read the introduction and the five steps. |
| Must know | Heating, Cooling, Lighting (Lechner) | 13.3.3, 13.2.4 | Chapter 1 and the three tiers. |
| Must know | CHOP Chapter 5.5 | 13.1.2, 13.3.2 | Resilience, integrated design, certification context. |
| Should know | Zero Carbon Building Design Standard v2 (CaGBC) | 13.2, 13.3.4 | Whole life carbon, the stage diagram, TEDI. |
| Should know | Reducing Embodied Carbon in Buildings (RMI) | 13.2.2, 13.2.3 | The key takeaways and the reduction categories. |
| Should know | BC Energy Step Code guides and supplement S3 | 13.1, 13.2.4 | TEDI, airtightness and overheating. |
| Should know | LEED Core Concepts Guide (USGBC) | 13.3.2 | Section 5 on LEED itself. |
| Skim | WELL Building Standard v2 (IWBI) | 13.3.1 | The concepts and the precondition structure. |
| Skim | LEED v4 BD+C and LEED Canada NC 2009 | 13.3.2 | Credit-level manuals; look, do not read. |
| Skim | Reeder's rating systems guide, RSMeans Green Building, RAIC Sustainable Development of Buildings in Canada | 13.3 | Only if time is left. |
A study order for this theme:
Page 22 for the ten specific objectives and page 29 for the TEDI sample question.
Learn upfront, embodied and operational carbon, and the concrete, steel and wood moves.
Modules A1 to D from the LCA Practice Guide, plus its five-step process.
Lechner Chapter 1, then the Step Code strategy list and the TEDI definition.
CHOP 5.5, then the LEED and WELL introductions for structure and categories only.
Practise applying each lever to a scenario, and go back to the source when you miss one.
If time is short, cut the rating-system manuals first. Our Section 3 study strategy places this theme in the whole section, and the Section 3 cost questions guide covers value engineering and sustainability trade-offs.
Yes, sustainability is tested as objective 13, Sustainable Design Literacy, in ExAC Section 3. Page 22 of the 2026 Preparation Guide lists its ten specific objectives on climate change, life cycle analysis and sustainable design strategies, and Section 1 objectives such as 1.2.6 and 6.1.5 touch sustainable design too.
No, objective 13.3.2 asks candidates to describe green building rating system concepts, not credit values. Learn how LEED is structured, what its categories cover and how it differs from WELL. Point details change between versions, and Appendix 3 lists older LEED editions than the one Canadian projects now register under.
Embodied carbon is the global warming potential of the materials and energy used to construct and maintain a building. Operational carbon comes from operating it, mainly energy use and refrigerant leaks. Together over the building's life they are whole life carbon, and the embodied emissions from stages A1 to A5 are called upfront carbon.
A whole-building LCA covers the product and construction stages (A1 to A5), the use stage (B1 to B7), the end-of-life stage (C1 to C4) and, as separate information, benefits beyond the system boundary (D). The LCA Practice Guide sets out five steps: define goal and scope, collect inventory, assess impacts, interpret results and report results.
LEED is a green building certification program that rates the environmental performance of a building and site, with prerequisites and optional credits. WELL is the International WELL Building Institute's standard for human health and well-being, organized into ten concepts such as Air, Light and Thermal Comfort, with preconditions and optional optimizations.
Thermal energy demand intensity, or TEDI, is the annual heating energy a building needs per square metre of floor area, after passive gains and losses, in kWh/m²/year. The Preparation Guide's only published sample for objective 13 asks which strategy lowers a school's TEDI, and the answer is adding heat recovery.
Start with the CaGBC Embodied Carbon Primer, the Carbon Leadership Forum's LCA Practice Guide, Chapter 1 of Lechner's Heating, Cooling, Lighting and CHOP Chapter 5.5. Then read the Zero Carbon Building Design Standard, the RMI embodied carbon report and the BC Energy Step Code guides. Skim the LEED and WELL manuals for structure only.
No, Section 3 is closed book. Page 12 of the 2026 Preparation Guide permits paper copies of the NBC 2020 and NECB 2020 for Section 2 only, and lists books, notes and reference documents as prohibited items. Sustainability concepts have to be learned before exam day.