Sustainable Construction: study guide - CCEA GCSE Construction
A study guide to Unit 2, Sustainable Construction, of CCEA GCSE Construction: sustainability and its three pillars, the environmental impact of construction, energy efficiency and U-values, renewable energy technologies, and water conservation.
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Unit 2, Sustainable Construction, is about building in a way that meets people's needs today without harming the future. It is the more analytical of the two examined units and is assessed by a 1 hour 30 minute written examination worth 25 percent of the GCSE.
What this unit covers
- Sustainability and sustainable development - meeting present needs without harming the future, and the social, economic and environmental pillars.
- The environmental impact of construction - resource use, waste, pollution and carbon across the building's life cycle, and how to reduce them.
- Energy efficiency in buildings - how heat is lost, insulation, U-values and energy ratings.
- Renewable energy technologies - solar PV, solar thermal, wind, heat pumps and biomass, and their advantages and limitations.
- Water conservation and management - saving water, rainwater harvesting, greywater reuse and sustainable drainage (SUDS).
How it is examined
Expect questions that ask you to define, describe and explain, plus longer extended-answer questions. Common forms include defining sustainable development and naming the three pillars, describing environmental impacts and ways to reduce them, explaining heat loss and U-values, comparing renewable technologies with advantages and disadvantages, and describing how to save and manage water. The longer questions reward several developed points, so plan two or three clear ideas and explain each.
Key facts to recall
- Sustainable development: meeting present needs without harming future generations.
- The three pillars: social, economic, environmental.
- Reduce, reuse, recycle (reduce is best); embodied energy versus operational energy.
- Heat is lost through walls, roof, floor, windows, draughts and ventilation; insulation cuts it.
- U-value: rate of heat loss per square metre per degree; a low U-value is better.
- Energy ratings run from A (most efficient) to G (least efficient).
- Renewables: solar PV (electricity), solar thermal (hot water), wind (electricity), heat pump (heat), biomass (heat).
- Water: efficient fittings, rainwater harvesting, greywater reuse, SUDS (permeable paving, soakaways, swales).
How to revise it
- Learn the definitions precisely. Sustainable development, the three pillars, U-value, rainwater harvesting and SUDS are all definition marks.
- Pair impacts with solutions. For every environmental impact, learn a way to reduce it.
- Get U-values the right way round. Lower is better; practise saying why.
- Compare the renewables. Learn the output and one advantage and one limitation of each technology.
- Plan extended answers. For six-mark questions, give and explain three clear points.
- Drill CCEA past papers for Unit 2 and mark against the official schemes.
Work through the linked dot points for full worked answers and exam-style questions on each part of this unit.