When aiming for sustainability and energy efficiency, windows are a critical element in the overall performance of a building. Whether you’re collaborating with an energy advisor, performing an energy efficiency audit, or adhering to the Step Code, the design and quality of windows significantly impact thermal performance, comfort, and energy consumption. Far beyond their aesthetic value, windows play a crucial role in regulating heat gain and loss and providing natural light, all of which are essential for a building’s efficiency and livability.