Architecture and Design Sustainable Design and Green Architecture 2 — Questions and Answers
Question 1: What is 'thermal bridging' in building envelope design?
- Heat stored in thermal mass materials
- A localized area of high heat conductivity that bypasses insulation, causing energy loss and condensation risk (Correct answer)
- The transfer of heat between two spaces via ventilation
- A design strategy for passive solar heating
Correct answer: A localized area of high heat conductivity that bypasses insulation, causing energy loss and condensation risk
Thermal bridging occurs where conductive materials (like steel studs or concrete slabs) penetrate the insulation layer, creating a path of high heat loss.
Question 2: What is the purpose of a 'cool roof' in sustainable design?
- To provide green roof planting areas
- To reflect sunlight and emit absorbed heat, reducing cooling loads and the urban heat island effect (Correct answer)
- To collect rainwater for reuse
- To provide additional insulation above the roof deck
Correct answer: To reflect sunlight and emit absorbed heat, reducing cooling loads and the urban heat island effect
Cool roofs use high-reflectivity and high-emissivity materials to reflect solar radiation and emit absorbed heat, lowering roof surface temperatures and building cooling demands.
Question 3: What does 'embodied carbon' refer to in sustainable construction?
- Carbon emissions from building operations over its lifetime
- Carbon dioxide emitted during the extraction, manufacturing, transport, and installation of building materials (Correct answer)
- The carbon stored in wood building materials
- Emissions from on-site construction equipment only
Correct answer: Carbon dioxide emitted during the extraction, manufacturing, transport, and installation of building materials
Embodied carbon encompasses all greenhouse gas emissions associated with building materials through their entire lifecycle, from raw material extraction through demolition.
Question 4: Natural ventilation strategies in buildings use which two driving forces?
- Solar gain and mechanical fans
- Stack effect (buoyancy) and wind pressure (Correct answer)
- Humidity differentials and barometric pressure
- Ground temperature differentials and convection
Correct answer: Stack effect (buoyancy) and wind pressure
Natural ventilation relies on the stack effect (warm air rises and exits at high openings, drawing cool air in below) and wind pressure differences across the building.
Question 5: Which strategy reduces potable water consumption in buildings by using captured rainwater or treated greywater?
- Water recycling for potable use only
- Non-potable water reuse for irrigation and toilet flushing (Correct answer)
- Greywater direct injection into drinking water systems
- Condensate recovery for domestic hot water
Correct answer: Non-potable water reuse for irrigation and toilet flushing
Non-potable water reuse systems collect rainwater or treat lightly used greywater for uses that don't require drinking-water quality, such as toilet flushing and irrigation.
Question 6: What is the 'Living Building Challenge' known for in sustainable design?
- The USGBC's most widely used green building rating system
- The most rigorous sustainable building standard, requiring net-zero or net-positive performance in energy, water, and materials (Correct answer)
- A voluntary reporting framework for building energy benchmarking
- An international standard for embodied carbon in construction materials
Correct answer: The most rigorous sustainable building standard, requiring net-zero or net-positive performance in energy, water, and materials
The Living Building Challenge, administered by the International Living Future Institute, is among the world's most rigorous green building standards, requiring regenerative performance across energy, water, materials, health, and equity.
Architecture and Design Sustainable Design and Green Architecture 2
What is 'thermal bridging' in building envelope design?