Retrofit is a set of measures, both physical and operational that can be made to a building to reduce energy bills, improve comfort and well-being, and make a building more sustainable. This might include improving insulation, window performance, solar shading, air source heat pumps etc.

Air Quality: Through improving ventilation systems, as well as biodiversity interventions, retrofit can improve indoor air quality, both in terms of CO2 levels and other particulate matter.

Warm in Winter: When a building is retrofitted, it will be better at retaining heat, creating a more comfortable indoor environment during the winter.

Cool in Summer: A well rounded retrofit will also help to reduce summer overheating, through the installation of solar shading, and improving ventilation.

Reduced Energy Costs: As the building loses less heat, it also requires less energy to be heated, reducing energy bills.

Sustainability: It is essential for the UK to decarbonise its building stock, which accounts for around 40% of all carbon emissions in the UK. Without retrofit, we will overshoot our carbon targets, with catastrophic local and global, impacts for people and planet.

Retrofit is for everyone, but might often be talked about as being unaffordable, and centered on homeowners. Done well, Retrofit has the potential to improve sustainability, accessibility, biodiversity, health & wellbeing, for people and communities across the UK.