scope:

This document provides an overview of the design principles for the building envelope in order to achieve a high quality and energy efficient built environment. The design principles include: - thermal performance; - daylight and visual environment; - air quality; - provisions of natural and mechanical ventilation; - air barrier (airtightness); - watertightness; - moisture proof; - soundproofing; - sustainability and integration with technical building systems and controls. This document is applicable to new buildings and the retrofit of existing buildings.