| 摘要 |
A roofing assembly for shieldingly covering the planking of a flat roof. At least one water drainage outlet is provided about a portion of its surface. The roofing assembly comprises: (a) a thick, substantially flat insulating batt; (b) top waterproofing membranes, gravel layer and cardboard layer;, and bottom waterproofing membranes and gypsum layer, being respectively applied on top and bottom walls of the insulating batts; (c) a rigid, corrugated sheet member, applied directly under the bottom gypsum layer and supporting the insulating batt and destined to be applied directly against the roof planking. The corrugated sheet member is formed by a thin rigid sheet, this thin sheet undulating in a wave-like pattern along a lengthwise direction, whereby the corrugated sheet member has a depth formed by the transverse gap between a successive pair of trough and crest of the wave-like thin sheet. Hence, the undulating sheet member depth tapers toward the water drainage outlet port, so that rainwater falling over the roofing assembly will be biased under gravity toward the water drainage outlet.
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