The building envelope may not use energy, but it has a significant impact on occupant comfort, ventilation, light transmission and building efficiency. This webinar will examine opaque areas (roofs, walls and doors) and fenestration (windows and skylights). We will examine energy standard ASHRAE 90.1 requirements for these components. Metrics and ratings for various building envelope materials will be discussed. Testing methods for air, water and thermal intrusion will be reviewed. Finally, the latest innovations in building envelope components will be revealed.