The initial development of the STBA was led by Neil May, Caroline Rye, Jonathan Garlick, Russell Smith, John Edwards and Seamus Hannah with the support of many others.

We now have a small team who carry out the day to day running of the organisation with the help of Steering Group Members and Supporting Organisations.

Nigel Griffiths


Nigel has over 25 years’ experience in the building industry as a practitioner, author and consultant and has a strong practical background in the repair and refurbishment of traditional buildings. While a Principal Consultant in Sustainable Buildings at Ricardo, he worked closely with UK government, overseas governments and other agencies to develop and evaluate policy  on energy efficiency and renewable energy. He has provided sustainable refurbishment advice to some of the most notable listed buildings in the UK and is also the author of the Eco House Manual (Haynes, paperback edition 2016). He lectures widely on traditional buildings, is the resident sustainability expert at “Build-it”, and member of the Steering Group for PAS2035

To contact Nigel, please email

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Nicholas Heath

Associate Technical Director 


Nicholas Heath is Founding Director of NDM Heath Ltd, an independent sustainable energy consultancy specialising in traditional building retrofit. Formerly Senior Consultant with Changeworks (where he remains an Associate Consultant), Nicholas has extensive experience in the existing building sector, particularly historic buildings and large-scale domestic retrofit.


He is the author of numerous traditional building retrofit guides, technical papers, planning guidance and research reports, and has developed and delivered technical training for many years both nationally and internationally. He has led high-profile research into solid wall insulation on traditional buildings, and worked with several local authorities and social housing providers to develop city-wide strategies for the responsible retrofit of traditional buildings. In addition he has led several award-winning retrofit projects, which have led to changes in local planning policy and are regarded internationally as examples of best practice in historic building retrofit.


Nicholas is an IHBC Associate, part-time lecturer at the University of York, and a licenced SAP and BREEAM Domestic Refurbishment Assessor.


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Cypren Edmunds

Communications & Events Coordinator

Cypren is the STBA Communications Officer. As a quaulified carpenter he has a keen interest in sustainable building and is a founding member and Director of Strawbale Building UK. As Chairperson for the High Path Community Association he is a strong advocate of social housing. 


Cypren has an excellent understanding of buildings and sustainability issues in both the commercial and public sector and provides communication support across all platforms for the community led housing group, RUSS Lewisham (Rural Urban Synthesis Society).

Cypren can be contacted by email at




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