二に重じゅう窓まどガラス

noun

double glazing; double-glazed window glass

Refers to the glass itself or the glazing system; often used in contexts of insulation or soundproofing.

• このマンションは二に重じゅう窓まどガラスで静しずかです。

  This apartment is quiet thanks to the double-glazed windows.

• 二に重じゅう窓まどガラスにすると暖だん房ぼう費ひが減へります。

  Installing double glazing reduces heating costs.