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:

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thermal performance;

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daylight and visual environment;

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air quality;

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provisions of natural and mechanical ventilation;

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air barrier (airtightness);

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watertightness;

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moisture proof;

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soundproofing;

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sustainability and integration with technical building systems and controls.

This document is applicable to new buildings and the retrofit of existing buildings.