In fact, triple pane windows are mandatory for all new construction in the EU as of this year[1]. I think double pane windows have been mandatory for years. Mod

In fact, triple pane windows are mandatory for all new construction in the EU as of this year[1]. I think double pane windows have been mandatory for years. Modern triple pane windows have less heat loss than the walls of most buildings built a couple of decades ago. [1] https://www.buildup.eu/en/practices/publications/directive-201031eu-energy-performance-buildings-recast-19-may-2010 https://www.buildup.eu/en/practices/publications/directive-2...