Panel of Experts

The following are a few of the leading experts in the sustainable building industry who have been instrumental in the formation and continuing work of the Sustainable Traditional Buildings Alliance. 

Bill Bordass

Principal of William Bordass Associates;  research and policy adviser to the Usable Buildings Trust;  and recipient of CIBSE’s low-carbon pioneer award.

Bill has worked as a designer but now evaluates the performance in use of new, existing and historic buildings and takes the findings back to owners, occupiers, managers, designers and government. He is particularly interested in how people, processes and technologies come together.

The Usable Buildings Trust is a charity that collects information about building performance, improves awareness of techniques for building evaluation, extracts lessons and attempts to influence clients, designers, builders, suppliers, occupiers, management and government. It also provides technical assistance to postgraduate students.


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Caroline Rye

Founding Partner at ArchiMetrics Ltd, Member of the Technical Panel of SPAB, Member of the UCL Bartlett School of Graduate Studies Complex Built Environments Systems Group

Caroline Rye has a background in practical building as well as academic research. She works in partnership with Cameron Scott as ArchiMetrics Ltd a small building performance research company formed in order to develop knowledge of building performance based on in situ monitoring practices. ArchiMetrics specialises in monitoring many aspects of building performance including fabric heat losses, indoor conditions, air quality and interstitial hygrothermal behaviour, often using bespoke solutions to answer particular performance questions. 

Along with Cameron Scott she is author of a number of research papers and reports including, for The Society for the Protection of Ancient Buildings, The SPAB Research Reports 1 & 2 on the subject of heat loss in solid wall buildings and the performance of buildings post-refurbishment (The SPAB Building Performance Survey). She is co-author with Neil May of the STBA's The Responsible Retrofit of Traditional Buildings: A report of existing research with guidance and recommendations for DECC. She sits on the SPAB Technical Panel and is seconded to The Bartlett School of Graduate Studies, University College London (UCL) as part of their Complex Built Environments Systems (CBES) group.


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Harry Paticas

Co-founder of Arboreal Architecture 

Harry qualified as an architect at Kingston University and was awarded a bursary for the diploma at the Architectural Association where he won prizes for his design and research work.  He then joined an established London practice, van Heyningen and Haward Architects, before setting up on his own in 2007. He was a director of Paticas Architecture for three years prior to founding Arboreal Architecture with Tom Raymont.  Arboreal joined the STBA as one of its first Affiliate members.

Harry’s projects include the award winning Clapham Retrofit.  The 170-year old Grade II Listed townhouse achieved the AECB Silver Standard for energy efficiency whilst retaining, and even enhancing, the heritage features of the home.  During the process of designing and supervising the building works of each part of the house, consideration was given for the options for materials, relating to thermal performance, sustainability, health and character. 

Each project that Arboreal embarks upon is treated as a learning opportunity, both for the practice and members of the construction teams. Experts, such as from English Heritage and thermal performance specialists, are regularly consulted for the latest research and materials information. This knowledge is shared with all those involved in the project. In addition to his education work at Arboreal, Harry continues to pass on what he learns as a visiting Lecturer at the University of Westminster (Architecture & the Built Environment).

Website:  Twitter: @harrypaticas

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Ian Mawditt 

Founder of Fourwalls 


Ian is an independent building researcher, specialising in the field of energy performance and occupant comfort. He is a director of Four Walls – a consultancy based in Bristol.  Key service areas include: post-construction testing and evaluation; in-use studies of building performance (including fabric analysis, indoor air quality, and ventilation effectiveness); energy use and analysis; and occupant satisfaction studies.  

Ian’s work and field experience help to provide an evidence base for informing building performance standards. He was part of the technical team supporting DCLG in the development of recent revisions to Part F and Part L of the Building Regulations (England and Wales). He is engaged by Innovate UK as an expert under the Building Performance Evaluation programme, and provided technical guidance for the Retrofit for the Future programme. He also works with academia and organisations such as the NHBC Foundation, supplying strategic and technical support.

Website:     Twitter: @Ian_Mawditt 

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Colin King

Director of Building Research Establishment Group

Colin is employed by the BRE as Director, with key responsibilities of being the lead officer on the energy performance of retrofit, refurbishment and the Hygrothermal performance of Buildings. Was one of the Technical Directors working on the DECC project “Understanding Heat Loss from external Walls” leading on the unintended Consequences and thermal performance of walls. He sits on numerous technical groups including the DECC Moisture Advisory Group, DCLG Part C, currently delivering Welsh Government revisions to Part A, B, C and L of the Building Regulations, and BRE member of the UKCMB (UK Centre for Moisture in Buildings), a partnership with UCL (Bartlett), UCL IEDE, Department of Civil, Environmental and Geomatic Engineering, Heriot Watt University, London School of Health and Tropical Medicine. 

He is the BRE representative on BS5250 Code of Practise for control of condensation in buildings, and sits on the BSi Retrofit Task Force, who’s function is to deliver the improvements identified in the Each Home Counts Report by Dr Peter Bonfield OBE for DBEIS and DCLG, he also Chairs the Fabric Improvement Implementation Group an Industry Body tasked with improving standards in thermal performance of existing buildings through training, quality control and standards.



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John Edwards

Director of Edwards Hart Consultants 

John is a practitioner, researcher and trainer who first undertook environmental monitoring and other non-destructive building analysis techniques in 1981 and has since worked on Castles, Cathedrals and the most humble of domestic buildings in the UK and beyond. This has ranged from major refurbishment and energy efficiency retrofit to the conservation of World Heritage Sites. John is qualified to post graduate level in building conservation and conservation accredited by the RICS. 

Since April 2014 John has been a Director of Edwards Hart Consultants where he leads on building surveys, technical analysis, energy efficiency, conservation and training. Prior to that John was Assistant Director of Cadw, the Welsh Governments Historic Environment Service, where as the professional lead on building conservation and sustainability he initiated and led Cadw’s very first live research project into the energy efficiency of traditional buildings. Prior to joining Cadw John worked for English Heritage. 

John has contributed towards many publications, guidance and qualification standards. This includes the latest British Standard on the conservation of historic buildings as lead author, co-author of the European Standard for the survey of historic buildings, co-author of CIOB guidance on retrofit and refurbishment and National Occupational Standards for the UK Governments Green Deal. John is also a member of the UK Green Construction Panel and a Trustee of the Institute for Historic Building Conservation.

Website:   Twitter: @JohnEdwardsEH 


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Richard Oxley

Oxley Conservation

Richard is a qualified Chartered Surveyor who is RICS Accredited in Building Conservation; he is also a full member of The Institute of Historic Building Conservation (IHBC) and holds the RICS Diploma in Building Conservation from the College of Estate Management. To complement his existing knowledge and understanding of the damp and timber problems suffered by old buildings Richard obtained the Certified Surveyor in Remedial Treatment (CSRT) qualification from The Institute of Wood Science.


Richard's book 'Survey and Repair of Traditional Buildings - A sustainable approach' was published by Donhead in May 2003; he has also had many papers published including articles on damp and timber treatment, environmental issues, valuing and surveying historic buildings.


Oxley Conservation was established in 1997 and has gained a reputation for work that ensures each client receives appropriate and sympathetic advice that respects individual buildings' nature and special qualities.

Website:   Twitter:  @OxleyConserv

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Robert Prewett

Director of Prewett Bizley Architects


Bob has implemented numerous deep retrofits of traditional and historic buildings including an 80% CO2 reduction retrofit (measured) and a Retrofit For The Future project.  Author of ‘Managing Retrofit Projects’ guide (as part of a series produced by Institute of Sustainability), he has also been involved with the development and delivery of Passivhaus Trust Retrofit Masterclass.  Bob is part of the steering and development for the Centre of Refurbishment Excellence (CoRE) and a teacher for their new Diploma in Retrofit Co-ordination.  He is a certified Passivhaus designer and RIBA Sustainable Futures member. Bob is part of the STBA team commissioned by Bristol City Council to develop their ‘design and technical guidance’ to support a city-wide retrofitting initiative.


Presett Bizley Architects' website:   

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Russell Smith

Director at RetrofitWorks and Parity Projects

Russell founded Parity Projects in 2005 whilst carrying out an extensive eco renovation of his own home.  He is passionate about low energy housing and sees it as a vehicle to improve lifestyles and energy bills as well as our collective environmental impact. Russell leads on our project management and training services, and has recently been nominated as a fellow of the Centre of Refurbishment Excellence.

website:  Twitter: @RetrofitRuss

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Sofie Pelsmakers

Co-founder Architecture for Change & Doctoral Researcher at UCL

Sofie Pelsmakers, co-founder Architecture for Change and doctoral researcher at UCL, is a chartered architect and environmental designer with more than a decade of hands-on experience designing, building and teaching sustainable architecture. She taught sustainability and environmental design and led a Masters programme in sustainable design at the University of East London. She is co-founder of Architecture for Change, a not-for-profit environmental building organisation and is currently a doctoral researcher in building energy demand reduction at the UCL Energy Institute. Her research investigates the heat-loss of pre-1919 suspended timber ground floors and how to best reduce heat-loss from such floors with least cost and disruption and while minimising unintended consequences.


website:     Twitter: @sofiepelsmakers 

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