Which window provides good thermal insulation?

To choose a window that offers good thermal insulation, it is important to consider the materials used. Wood, although requiring regular maintenance, is an excellent natural insulator. PVC is appreciated for its good value for money and low maintenance, while aluminum, despite having lower natural insulation, can be improved with thermal break systems. Composite windows, combining multiple materials, offer a balance of the advantages of each.

Glazing also plays a crucial role in thermal insulation. Double glazing, consisting of two panes of glass separated by an insulating gas, is the minimum required for good performance. For enhanced performance, Low-E (insulated glazing) and triple glazing are recommended. Solar control glazing is ideal for sunny regions, maximizing the greenhouse effect in winter and reducing it in summer.

Finally, it is essential to rely on performance indicators such as the Uw coefficient, the AEV rating, and the solar factor (Sw) to assess a window’s efficiency. Proper sealing of joints and features such as Warm Edge spacers are also crucial to prevent thermal bridges. To maximize thermal performance, prefer casement windows over sliding ones and consider accessories such as roller shutters and thermal curtains.

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