Fabric-first is an energy-efficiency strategy that focuses on improving the performance of a building's physical structure (the "fabric") by using high quality, insulated, airtight components and design. The goal is to reduce heat loss and energy demand from the outset, making heating, cooling, and ventilation systems more effective. This approach focuses on the building's fabric, such as walls, windows, and roof, rather than relying solely on "add-on" technologies or efficiency of building services.
