| The term building envelope refers to the components, such as roofs, walls, windows, and foundation, that separate a building's interior from its exterior. It must be designed carefully to avoid creating thermal bridges. |
建筑围护结构是指将建筑内部与外部隔开的组件。围护结构必须精心设计以避免产生热桥。 |
| Key features of a green building's walls include: |
绿色建筑墙体的关键特征包括： |
- A thermal barrier (e.g., insulation and high-performance windows) to limit heat transfer. A material's ability to resist heat flow is measured in terms of R-value.
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- 隔热层（如保温材料和高性能窗户）限制热传递。材料抵抗热流的能力以R值衡量。
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- An air barrier (e.g., spray foam, caulk, or sealant) to limit uncontrolled air leakage.
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- 气密层（如喷涂泡沫、密封胶或密封剂）限制不受控的空气渗漏。
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- A water barrier (e.g., waterproofing materials) to prevent rain or melting snow from entering the building.
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- A vapor barrier to manage the movement of water vapor and prevent condensation within walls. Trapped moisture can lead to mold growth.
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- 隔汽层管理水蒸气的运动并防止墙体内冷凝。积聚的湿气可导致霉菌生长。
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