Double-glazed windows

Glazing requirements will alter depending on your project and location. When you know the regulations, you will choose between four types: single glazed, double glazed, triple glazed and quadruple glazed. We mentioned the U value requirement earlier. A low U value means the window achieves an efficient temperature retention; the lower, the better. In a cold climate, a good U value for a window is between 0.17 and 0.39. U Values are measured in W/m2K.