As the UK moves toward net-zero carbon, architects must balance Approved Document L’s tighter energy-efficiency standards with the overheating prevention measures in Approved Document O. This CPD highlights how these regulations shape window and façade design – covering U-value and airtightness requirements, solar-gain control, shading, and natural ventilation.
Reflecting Eurocell’s fabric-first philosophy, the session emphasises optimising the building envelope – walls, roofs and fenestration, before relying on mechanical systems. Using real-world case studies, we show how early collaboration with fenestration experts helps deliver energy-efficient, comfortable, and future-ready homes that support low-carbon heating and long-term sustainability.