The present invention relates to a waterproofing system for rooftop greening, wherein the waterproofing system for rooftop greening is divided into cells under the waterproof sheet that is waterproofed in the rooftop greening area to form an independent divided compartment, and leaks from the outside for each divided compartment. A waterproof sheet 10, an elastic band 20, a water expansion module 30, and a detection means 40 are used to determine whether the leak point is easily detected, and to improve workability and reduce construction costs according to maintenance. It consists of major components including.
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