二に重じゅうガラス

noun

double glazing; double-paned glass

Refers to window glass consisting of two panes with a sealed air gap for insulation or soundproofing.

• このマンションは二に重じゅうガラスなので、外そとの騒そう音おんが気きになりません。

  This apartment has double-paned glass, so outside noise isn't bothersome.

• 冬ふゆの暖だん房ぼう費ひを抑おさえるために、窓まどを二に重じゅうガラスに交こう換かんした。

  We replaced the windows with double glazing to reduce heating costs in winter.