Passivhaus Affiliate

Passivhaus Retrofit Masterclass lecture series: Introduction

Date: 29 September 2021 Time: 13:00 - 14:30
Location: Online Cost: Local Authorities & Housing Associations: Free, PHT member: Free, Non-member: £30+VAT

Image credit: Bowman’s Lea EnerPHit  © Harry Paticas/ Agnese Sanvito.

The energy needed to run the UK’s buildings accounts for 27% of our annual carbon emissions with 18% alone coming from our domestic housing stock. With the UK possessing one of the oldest housing stocks in Europe and with many new homes being inadequately built, we face a colossal challenge of retrofitting over 28 million buildings by 2050.

The Trust is leading a cross-industry retrofit working group. Guidance will be published jointly with partners, including LETI, RIBA, the AECB and others in Autumn 2021. It identifies common building typologies and proposed upgrade works to help reach net-zero carbon targets.

Expanding upon this publication, the Trust is also launching an exciting new Passivhaus Retrofit Masterclass lecture series this September. This introductory session will delve into where Passivhaus fits into net-zero retrofit and how it offers an effective route to upgrading our existing buildings. 

This 90-minute event is the first in our upcoming Masterclass lecture series due to start in early 2022, but is also an excellent standalone overview explaining how - and why - to take a Passivhaus approach to any retrofit project.


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Welcome by chair

Kym Mead, Passivhaus Trust


Where Passivhaus EnerPHit fits into Net Zero

Sarah Lewis, Passivhaus Trust


Passivhaus Retrofit options: Single stage, Step-by-Step, Component approach

Sarah Lewis, Passivhaus Trust




Passivhaus EnerPHit Strategies

Mark Elton, Cowan Architects


Passivhaus EnerPHit delivery

Mark Elton, Cowan Architects




Closing remarks - next in the series

Kym Mead, Passivhaus Trust

NB: Programme subject to change


Next Masterclass lecture in the series:

  • Solid wall construction retrofit: 15 December 2021 (date TBC)
  • 1930s cavity construction retrofit: 26 January 2022 (date TBC)
  • 1980s step by step construction retrofit: 23 February 2022 (date TBC)
  • Multi-Residential retrofit: 30 March 2022 (date TBC)
  • Non-Domestic retrofit: 27 April 2022 (date TBC)

NB: Draft programme subject to change


Kym Mead

Sarah Lewis

Mark Elton

Kym Mead, Education Associate, Passivhaus Trust

Kym is a Passivhaus certifier and current member of the PHT technical panel.

Building upon his prior experience from several architectural practices and the Building Research Establishment (BRE), he has organised many successful Passivhaus Trust masterclasses and research reports. He has previously supported the Trust as an Associate Technical Director. 

Sarah Lewis, Research & Policy Director, Passivhaus Trust

Sarah is an architect and Passivhaus consultant who has been involved in the development of some of the UK’s largest Passivhaus schemes, and more recently, the first UK school aiming for EnerPHit certification.

Sarah is also a published author of the best-selling book ‘PHPP illustrated’, a complete user guide to the Passivhaus Planning Package tool.

Mark Elton, Associate Director, Cowan Architects

Mark has been a practising architect for 24 years, and is an accredited Passivhaus Designer.

With considerable experience in low energy architecture and retrofit on a wide variety of award-winning projects, Mark was a committee member on the RIBA Sustainable Futures group for 6 years, and continues to engage in RIBA matters relating to the retrofit agenda.



  • PHT member: Free

  • Local Authorities & Housing Associations: Free

  • Non-Member: £30+VAT



Book now via the online registration form.

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Further Information

Passivhaus Retrofit Campaign

Is Passivhaus Retrofit right for you?

Passivhaus: the route to zero carbon?

·        Where Passivhaus fits in the net zero retrofit

·        The Passivhaus retrofit options

·        Materials


90 mins session



·        Site delivery

·        Strategies

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