Near the edge of the roof, he stumbled on construction materials, lost his footing and fell.

就在房顶边缘处，他绊在施工材料上，失足跌下。

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This article introduces the waterproofing design of the roof, the characteristics of waterproofing materials, construction technology of planted and impounded roof and the roof greening.

介绍了屋面工程防水设计方案、防水材料特点、种植和蓄水屋面的施工工艺和屋面绿化等内容。

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This paper introduces the construction technique of inversion type roof, and probes into its selection of waterproof and insulating materials and construction methods.

介绍了倒置式屋面施工工艺，并对其防水材料、保温材料的选用及施工方法进行了探讨。

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