When gardens are planted directly on the roof, a waterproof membrane is laid down first, followed by insulation and a root barrier.
当花园直接种植在屋顶上，防水膜放在最下层，其次是隔热和根障。
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The article waterproof roof membrane leakage causes and prevention methods were discussed.
文章对卷材防水屋面渗漏的原因及防治法子进行了探讨。
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