STBA Staff Team

Director: Peter Draper

Peter has been appointed as the STBA’s Director after serving both as Co-Director and Sustainability Chair . Peter has been heavily involved in two of the STBA’s projects with Passive Systems and Melin Homes.

With the Welsh Government being proactively involved in the Whole House Approach it is useful to have a direct link from the STBA in Wales’ capital.

Peter is the founding member of Rounded Developments Enterprises, which is an independent social enterprise based in Cardiff. This work has always focused on community based enterprises and Peter’s over 25 years of experience in the voluntary sector in SE Wales has proved to be a real success in helping groups find holistic solutions to their construction needs. Peter was also a co-author in the team with CITB to develop SUP training in pre 1919 construction which morphed into the Level 3 qualification on Energy Efficiency Measures for Older and Traditional Buildings.

Peter is a qualified Building Surveyor, Retrofit Co-ordinator and DEA. Peter can be contacted by email at

Communications & Events Co-ordinator: Cypren Edmunds

Cypren is the STBA Communications Officer. As a qualified 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

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.

Policy Advisor: Nigel Griffiths

Nigel was the Director of the STBA from 2013 to 2021. Prior to this he was a consultant in energy efficiency policy development for UK government, overseas governments and many other agencies. He is the author of several books and lectures widely on sustainable buildings; he is the sustainability adviser to the Build-it self-build group, develops retrofit plans for traditional buildings & portfolios, and audits renewable heat installations on behalf of Ofgem. He continues to work on some STBA projects and provides policy advice.

To contact Nigel, please email