Supporting quality and consistency in domestic retrofits.

With 19 million UK homes needing energy efficiency improvements, retrofit is critical to achieving net zero. BS 40104:2025 provides a comprehensive, risk-based methodology for assessing dwellings before retrofit works are carried out—ensuring projects are based on sound, standardized practice.

This session, taking place during our Net Zero Week 2025, will introduce the key features of the new standard, explain its connection to PAS 2035 and explore how it supports safer, healthier, more energy-efficient homes.

What's on the agenda:

  • An overview of BS 40104:2025 and what’s new.
  • How it aligns with and expands on PAS 2035.
  • The importance of detailed retrofit assessment.
  • How the standard supports improved retrofit outcomes, health and sustainability.
  • Key use cases for assessors, coordinators, manufacturers and specifiers.

Webinar details:

Date: Friday 26 September 2025

Time: 14:00 – 15:00pm (BST)

Location: Online 

Agenda:

14:00    Welcome and introductions

  • Colin McKerracher, Lead Standards Development Manager, BSI

14:05     The development of a new standard for retrofit assessment, BS 40104

  • Richard Fitton, Professor of Building Performance, University of Salford, Chair of the BS 40104 Drafting Panel

14.15    Energy performance and occupancy

  • Alan Pither, Director, Alan Pither Ltd

14.25    Retrofit assessment in the heritage sector

  • John Edwards, Professor of Practice, University of Wales Trinity Saint David
  • Joanne Williams, Risk and Regulations Heritage Surveyor, Historic England

14.35    The Application of BS 40104 – Managing Compliance

  • Andrew Parkin, Director at Elmhurst Energy, Chair of the Property Energy Professionals Association

14.45    Panel Q&A


15.00    Close

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