Are small changes worth it? Our fabric vs technology research
At Ecofit our practical work is informed by our technical knowledge as well as practical experience. And we are passionate about expanding our own technical knowledge. Our technical lead Julia Smyrnowa drives our organisational CPD programme and is leading our research into the impact of retrofit interventions using Sheffield homes as a petri dish.
Affordability is the biggest factor preventing people from retrofitting their homes (read more about these factors here) and homeowners currently adopting a comprehensive approach to retrofitting their homes are aware that financial break-even returns are long-term and are motivated by the swifter environmental benefits.
In September 2024 we began a research project to evaluate energy, carbon, and cost savings for 20 homes in South Yorkshire, exploring “light retrofit” and “deep retrofit” scenarios with the potential addition of heat pumps. The two approaches are as follows:
Light Retrofit: involving minor or moderate modifications, such as draught-proofing, adding loft insulation, upgrading to double-glazing, insulating hot water tanks, or installing thermostatic radiator valves. These modifications are less costly, minimally disruptive, and can typically be done while the house is occupied.
Deep Retrofit: more extensive energy improvements that significantly enhance the building's overall performance. Examples include external or internal wall insulation, triple glazing, enhanced airtightness, and centralised mechanical ventilation with heat recovery (MVHR). While this approach offers substantial energy efficiency benefits, it is more disruptive, generally requiring the house to be unoccupied, and involves a higher upfront cost.
Our research will generate customised recommendations on retrofit strategies suited to various types of homes and households, taking into account factors like dwelling type, age, construction, heating habits, budget, and long-term retrofit goals. A particular focus will be on showcasing the impact of “light retrofit” for households interested in sustainability but wary of the costs and disruptions of extensive retrofits.
Want to learn more about our research? Stay in touch!
This research has been funded by the Department of Energy Security and Net Zero via their Community Energy Fund. DESNZ believes, just as we do, that gaining new knowledge – which we use to inform the work of our whole industry – is vital.
