壁の断熱は外側にすでに２００ｍｍの断熱層を作ってありますが、室内側にも１００ｍｍのグラスウール断熱材を入れて外側と合わせて３００ｍｍの断熱層にします。

The insulation of the wall already has a 200 mm heat insulation layer on the outside, but also add 100 mm glass wool insulation to the interior side to make a heat insulation layer of 300 mm together with the outside.