Guidance and reports

There is a wealth of good quality retrofit guidance available. Some recommended publications and reports include:

• A Bristolian’s Guide to Solid Wall Insulation (2015)
• Energy Efficiency Guide for Letchworth Garden City residents (2024)
• HCCSP Retrofitting Your House Guide (2024)
• Insulation and retrofit – Finding the sweet spot (2024)
• LETI Climate Emergency Retrofit Guide (2021)
• Retrofitting Your Home – Cambridge Guide (2022)
• Retrofit options study of a ‘typical’ home in Letchworth (2025)
• Saltaire Retrofit Handbook (2024)
• The Surrey Home Energy Improvement Guide (2025)

See further guidance documents and resources on the National Retrofit Hub’s Archetypes Library

Useful links and organisations

• Alliance for Sustainable Building Products – https://asbp.org.uk
• BE-ST – https://www.be-st.build
• Carbon Co-op – https://carbon.coop
• Centre for Sustainable Energy – https://www.cse.org.uk
• Energy Saving Trust – https://energysavingtrust.org.uk/
• Historic England – https://historicengland.org.uk
• Institute of Historic Building Conservation – https://ihbc.org.uk
• Letchworth Garden City Heritage Foundation – https://www.letchworth.com
• LETI – https://www.leti.uk
• MCS Foundation – https://mcsfoundation.org.uk
• National Energy Foundation – https://nef.org.uk
• National Retrofit Hub – https://nationalretrofithub.org.uk/
• Passivhaus Trust – https://www.passivhaustrust.org.uk
• People Powered Retrofit – https://retrofit.coop
• Retrofit Academy – https://retrofitacademy.org
• Retrofit Works – https://retrofitworks.co.uk
• SuperHomes – https://superhomes.org.uk
• Sustainable Energy Association – https://sustainableenergyassociation.com
• Sustainable Traditional Buildings Alliance – https://stbauk.org