Did you know that windows play an important role in our homes and offices? In general, they’re important in our day-to day lives. They brighten our days as they let the sunlight flow in. But why do windows really matter? They are a critical element in creating indoor spaces that we enjoy. As part of the building envelope, windows offer daylighting and shading systems to help reduce undesirable heat loss and air leakage. In simple terms, they keep the cool and conditioned air indoors in summers and the warm air in during winters.