You can tell a triple glazed window by the number of stars displayed on the Energy Saving Trust label, which indicates how energy efficient a window is. For instance, a window with double glazing displays an A**rating while the single-glazed window with stars displays an A*. Our triple-glazed windows display an A*** rating and are among the best installed in homes in Brighton and you’ll notice it immediately – quieter, smoother, and more resistant to condensation.