| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor structure capable of effectively reducing a width warp, a difference in level, or a joint gap due to floor heating heat. SOLUTION: The floor structure 11 arranging a floor heating surface floor board 15 on a backing plywood 13 via a sound insulating sheet 14 is characterized by that the sound insulating sheet 14 comprises an asphalt sound insulator and a thermal deformation rate is <=1%.
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