Energy-led domestic retrofit: impact of the intervention sequence

Sophie Ann Simpson, Phillip Frank Gower Banfill, Victoria Haines, Rebecca Mallaband, Valerie Mitchell

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)
188 Downloads (Pure)


Interviews conducted with householders reveal that energy efficiency is often a lesser motivation than other factors for undertaking home improvement work. Homeowners' approach to refurbishment is typically staged over several years, not as a whole house retrofit. As the operational performance of an individual emission-reducing technology typically depends on what other measures are already in place, the retrofit intervention sequence can potentially affect the overall performance of the dwelling. The impact of the intervention sequence on a semi-detached 1930s house is investigated with dynamic thermal modelling, using five sequences based on different homeowner personas developed from qualitative interviews. The results show that, whilst a whole house retrofit would reduce cumulative CO2 emissions over 25 years by 54%, the sequences actually implemented by the individual households result in significantly smaller reductions of between 42% and 24%. This variation in operational performance due to the intervention sequence means that there is a variable return on the investment for a particular technology and, significantly, that different sequences will yield different cumulative emission reductions. This has significant consequences for policies providing financial incentives for energy-led retrofit, particularly to include the intervention sequence and timing.
Original languageEnglish
Pages (from-to)97-115
Number of pages19
JournalBuilding Research and Information
Issue number1
Early online date8 Jan 2015
Publication statusPublished - Jan 2016


  • consumer choice
  • energy
  • energy efficiency
  • Housing
  • homeowners
  • low carbon refurbishment
  • retrofit

ASJC Scopus subject areas

  • Building and Construction
  • Civil and Structural Engineering


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