Fabric first
Insulation, draught proofing and glazing reduce heat demand before adding new technology.
Homes lose energy through walls, roofs, windows, draughts, inefficient heating and everyday habits. Your job is to spend the budget wisely: reduce carbon, cut bills, improve comfort, save water and avoid creating new problems such as damp or poor ventilation.
Insulation, draught proofing and glazing reduce heat demand before adding new technology.
Heat pumps work best in efficient homes and can greatly reduce fossil-fuel heating emissions.
Solar, batteries, meters and controls help households use energy when it is cleaner and cheaper.
Greywater, water butts and ventilation support gardens, health and climate resilience.
Drag an upgrade onto the house, or tap one to learn and install it.
Drag upgrades onto the house to begin retrofitting, or tap an upgrade to learn more and install it.
Tip: Start with insulation and draught proofing to reduce heat demand before choosing major heating technology.
Fabric first: insulation, draught-proofing and glazing usually make every other technology work better.
Ventilation matters: sealing a home without planned ventilation can increase condensation and damp.
Whole-house thinking: the best retrofit is a package, not a single gadget.