The ecological approach
I am delighted about the UK property industry’s huge surge in interest in everything eco these last couple of years. After 35 years working in the industry, it is highly gratifying to see sustainability finally reaching the top of the political, planning and construction agenda.
Of course, despite the high level of interest in delivering a more sustainable built environment, achieving real changes remains an immense challenge.
To my continued frustration, those in procuring, planning and constructing buildings still have little choice when they need expert advice about what sustainability really means in practice. Too many advisors, designers and product manufacturers are still immersing themselves in ‘greenwash’ by making over-blown statements and claims regarding sustainability, which all too often do not stand up close to scrutiny. And as the green bandwagon starts to roll, the false claims are a source of dismay to those of us who are truly passionate and committed to delivering genuinely sustainable
outcomes.
Take ‘zero carbon’ buildings as an example. The UK Government has declared its ambition to ensure that all our new homes are zero carbon by 2016 and new non-domestic buildings zerocarbon by 2019.
I’m a committed supporter. The drive towards zero carbon has had a powerful effect in galvanising the UK housebuilding and property development community and in stimulating innovation.
But there is so much more to delivering exemplary built environments than zero carbon. In fact, there is a real danger that a fixation on zero carbon may result in highly perverse outcomes and deliver seriously damaging and unintended consequences in terms of sustainability – with the pursuit of the ‘best’ becoming the enemy of the good.
The Government wants to see all new homes built to the highest level (Level 6) of the Code for Sustainable Homes by 2016. Allowing for the time required to design, specify and fund a development of Code Level 6 new homes by 2016 actually means housebuilders and designers having all the answers to the zero carbon challenge by about 2012 – just four years from now. And housebuilders working in the social housing sector are having to move even faster, producing Code Level 3 or 4 homes already.
Unfortunately, it seems to me that the single-minded scramble to design and build Level 6 homes gives out the message that this is the highest ambition and most worthy outcome we should aim for. It’s not.
If we end up with ‘zero carbon’, Code Level 6 homes that are uneconomic to maintain, are built on flood plains, overheat in summer, have poor acoustic performance, poor indoor air quality or other unintended consequences, then we have created a generation of homes that are unfit for people. We can’t call this sustainability.
For example, some recent prototype ‘zero carbon’ houses have been widely and misleadingly publicised as the answer to our zero carbon aims. In fact, recent research has revealed that some technologies (such as micro-wind systems) fitted on buildings contribute very little to carbon reduction, particularly when applied in the urban environment – indeed in some locations they may even be net-consumers of energy.
I am not convinced that zero carbon is even a useful label for dwellings at all. The actual definition of zero carbon differs significantly between various Government departments and agencies, and some of the definitions are based on completely unscientific formulas.
A home is only zero carbon in the sense that it complies with a theoretical carbon requirement. It’s how we use that home that really matters. Calling a home zero carbon could offer consumers a false promise. A home can only be genuinely
zero carbon if the occupants’ lifestyles are prescribed and energy is rationed in order to balance onsite energy generation – which is both impractical and entirely politically unacceptable.
In my opinion, addressing the challenge of climate change requires a more holistic approach – addressing and nurturing behavioural change in occupants and users, which in turn supports a lowcarbon and sustainable lifestyle.
For instance, incorporating appropriate planting and landscape strategies can reduce ‘urban heat island’ and building energy loads as well as offering visual and amenity value and support for ecological enhancement. Designing for local food production and space for farmers’ markets can reduce vehicle journeys and offer amenity and ecological benefits. Integrating living and working environments with local satellites and homeworking options can have similar benefits.
At Inbuilt, we have developed a 5 step ‘whole system’ approach to delivering sustainable built environments, which involves a close and collaborative partnership with our clients, and a complete integration of the design process.
This approach involves engaging with clients at the earliest stage, designing out technical complexity by fully exploiting all passive design options and ensuring that buildings are as energy efficient as possible.
It also means incorporating cost effective renewable technologies, ensuring that buildings can be easily maintained and managed, and finally undertaking post-occupancy evaluation – not only to check that buildings are fit for people to live in, but also to feed the research findings into future projects and continuously improve current technologies.
The ‘whole system thinking’ approach means working to find natural solutions to reduce our dependence on energy-intensive systems. There are so many opportunities offered by nature to ventilate, heat, cool and illuminate our buildings.
There is also a critical role for the ecologist and landscape architect in this approach. Landscaping in urban design plays an important part in microclimate control, maximising biodiversity and managing carbon. We need to discuss issues like the appropriate density of development as well as urban and landscape design quality.
For new developments this might mean working to a greater extent with the natural landform and ecosystems rather than trying to impose a false order and contrived design. In existing urban environments, it may mean a return to the tree-lined streets designed by our Georgian and Victorian forebears, or higher density redevelopments with fewer personal gardens but more modern public parkland in the style of the best designed parts of London or Bath.
The key to ‘whole system thinking’ is a close collaboration from day one, working with the client, the local community, the architects and landscape architects, ecologists, planners, building control authority, sub-contractors, energy suppliers and the entire supply chain.
Together we find solutions that address and resolve multiple problems and issues simultaneously. We save money and time, and deliver numerous synergistic benefits.
In the meantime, I think we also need to remind the Government that the zero carbon issue is not just about new build. We’ve already built over 70% of the 2050 stock, so addressing low-carbon lifestyle issues in the existing built environment should be our highest priority.
We need to avoid being distracted by the new build zero carbon rhetoric from the vital challenges of reducing carbon emissions from the existing building stock, and of securing investment and planning permission for large scale renewable energy systems.
In terms of pounds sterling invested per tonne of carbon saved, both of these objectives will provide a much greater and faster return than making all new buildings zero carbon.
Contact
Dr David Strong, Chief Executive, Inbuilt
Tel. +44 (0)1923 277000
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