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We would like to introduce a case where approximately 97% of the radiant heat from the sun was cut. Old slate roofs contain asbestos, making the removal process costly and labor-intensive, and addressing issues such as summer heat and leaks has been a challenge. In this case, by covering the old roof with Galvalume steel sheets and installing heat-insulating sheets in between, we were able to reduce costs and labor while mitigating summer heat and achieving insulation effects and leak prevention. [Challenges] ■ The removal of slate roofs containing asbestos incurs significant costs and labor. ■ Issues with rising indoor temperatures in summer, lack of insulation in winter, and leak prevention for old roofs. *For more details, please download the PDF or feel free to contact us.