The principles of green roofs are:
1. Vegetation: The primary feature of a green roof is the vegetation that it supports. Green roofs typically have a layer of soil that allows plants to grow, providing natural insulation, and aiding in reducing the amount of runoff into storm drains.
2. Drainage: Green roofs require drainage systems to prevent the soil from becoming waterlogged. This also helps to minimize the amount of runoff during heavy rains.
3. Waterproofing: A waterproof membrane is installed underneath the layer of soil to prevent leakage into the building.
4. Maintenance: Green roofs require regular maintenance, including watering, pruning, and fertilizing, to ensure that the vegetation thrives.
Green roofs are gaining popularity because they offer a wide range of benefits. They provide natural insulation, reduce the urban heat island effect, and improve air quality. They also help to reduce the amount of stormwater runoff, which can help to prevent flooding and protect water quality. Additionally, green roofs provide habitat for birds and insects and can improve the aesthetics of urban areas. Green roofs are also being viewed as a way to help mitigate the effects of climate change by reducing greenhouse gas emissions and promoting biodiversity.
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