"Cold roofs" are also effective for preventing leaks.

In February 2014, the Kanto region experienced record-breaking heavy snowfall. Many buildings suffered from "suga more" (the formation of ice blocks at the eaves of roofs, which causes leaks) due to the unprecedented amount of snow accumulation. The cold roofs were able to withstand snow depths exceeding 1 meter, and the effectiveness of suppressing suga more was confirmed at various installation sites. In addition to summer heat insulation, the winter benefits now include "heat retention effects," "condensation mitigation effects," and a newly added "suga more suppression effect."

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