Job Book 9th Edition - Book - Page 153
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Stage 2 > Concept Design
• Check the environmental impact of key materials and the
Construction Strategy.
• Consider resilience to future changes in climate.
• Set out the site-scale environmental design criteria (e.g. solar
orientation, overshadowing, SuDS, waste).
• Consider the design of the space between buildings as well as
the buildings themselves.
• Consider the need for and scale of private, semi-private and
public external space.
• Establish maximum plan depths to achieve desired levels of
natural ventilation, daylight and view.
• Design for buildability, usability and manageability.
• Consider the impact of complexity of form on thermal
performance, airtightness and inefficient or wasteful use of
materials.
• Establish an appropriate glazing proportion and shading
strategy for each orientation to provide good levels of daylight
while avoiding excessive glare, solar gain or heat loss.
• Establish appropriate element thicknesses to achieve the
U-values required by the energy strategy.
• Check that materials and the construction approach will
provide a level of thermal mass that is appropriate to the
environmental design strategy.
• Refine and review design decisions to minimise the quantity
of materials used and to minimise construction waste (for
guidance, see www.wrap.org.uk/designingoutwaste).
• Review the embodied impacts of the materials and the
construction approach in the context of the building’s lifespan.
• Avoid design solutions that inhibit adaptation and alternative
use of the building or its components and materials.
• Take particular care to avoid short- and long-term damage to
retained traditional building fabric from ill-considered upgrade
interventions.
• Ensure that the design implications of any components
essential to the success of the Sustainability Strategy (e.g. space
for fuel deliveries and waste handling, roof collector area and
orientation, location and size of rainwater harvesting tanks,
SuDS attenuation, etc.) are understood by all members of the
project team.
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