2階の天井は屋根の勾配そのままです、ここに１４０ｍｍ厚のｸﾞﾗｽｳｰﾙ断熱材を2重に入れますがまず1枚入れてから電気配線工事をしてその後に2枚目を入れます。

The ceiling on the 2nd floor is as it is the slope of the roof, here we put the glass wool insulation material of 140 mm thick in duplicate, but after putting one piece first make electrical wiring work and then put the second piece