STBA Staff Team

Director: Nigel Griffiths

Nigel Griffiths is a sustainability and energy efficiency expert in the built environment with over 25 years’ experience as a practitioner, project manager, author and consultant. As Director of the Sustainable Traditional Buildings Alliance, he works at the cutting edge of sustainability for heritage buildings. As a Principal Consultant with Ricardo, he provided practical energy efficiency, renewable energy and sustainability strategies for numerous buildings and large property portfolios. He has also worked extensively on policy development in this sector in the UK and overseas. He continues to inspect Renewable Heat installations on behalf of Ofgem, and is a lead technical expert to BEIS on the Social Housing Decarbonisation Fund.  He is the author of several books including the Haynes Eco House Manual, writes for the Build-it monthly self-build magazine and is the resident sustainability expert at their UK exhibitions. 

To contact Nigel, please email

Associate Technical Director: Nicholas Heath

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).

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. 

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

Project Associate: Peter Draper

Peter is a Building Surveyor, Retrofit Co-ordinator and Domestic Energy Assessor who runs Rounded Developments Enterprises in Wales. He was the co-author of the original Level 3 Specialist Upskilling Programme for CITB that has since been adapted into the “Energy Efficiency & Retrofit of Pre-1919 Traditional Buildings” course. He has served as the STBA’s Sustainability co-Chair and Director.

He is currently running the BEIS funded Thermal Efficiency Innovation Fund project with Melin Homes and Rhondda Housing Association for the STBA. This four year project has been assessing the real world application of the Whole House Approach within a Housing Association setting.

Communications & Events Co-ordinator: Cypren Edmunds

Cypren is STBA’s Communications Officer. As a qualified carpenter he has a keen interest in sustainable building and is a founding member and Chair of Strawbale Building UK and a Director for William Morris House, Merton. As Chairperson for the High Path Community Association, Merton, he is a strong advocate of social housing.

Cypren can be contacted by email at