Regarding triple glazing, the fundamental disparity lies in its composition of three panes, unlike the two found in double glazing. However, the actual differentiating factor between the two lies in the presence of not just one, but two air gaps within the triple-glazed unit, resulting in a substantial reduction in thermal transmission. With twice the number of air gaps compared to double-glazed units, triple glazing provides an enhanced buffer against cold air, further fortifying your living space against temperature fluctuations.

Thermal performance

The standout feature of triple glazing lies in its remarkable energy efficiency. While standard double-glazing windows boast an impressive WER rating of A (with A+ being the highest available), triple-glazed windows soar to new heights with an A++ rating, signifying their superior efficiency.

The discernible disparity in U-values, which gauge heat transmittance, highlights how much more efficient an additional glass pane can make a window. Triple glazing triumphs with an outstanding Uw rating of 0.99, whereas even the best double glazing records 1.3. By upgrading from outdated double glazing to the triple variant, one can expect a substantial 60% boost in energy efficiency.

Presently, building regulations mandate replacement windows to possess a minimum U-value of 1.4 W/m2K. However, with a concerted drive towards enhancing energy efficiency in housing to meet climate change targets, the U-value requirement may be further reduced.

In UK triple glazing has secured a substantial 60% market share. It proves exceptionally advantageous for regions with frigid climates and windows facing north, as it effectively prevents the infiltration of cold air while preserving the warmth within a room.

The G-value serves as a measure of solar gain transmitted through a window. A higher G-value indicates greater solar gain passage, potentially resulting in warmer rooms. Conversely, a lower G-value signifies reduced solar radiation transfer, leading to cooler indoor environments.

Solar gain is effectively controlled by the additional glass panes in triple glazing. This configuration curtails the influx of solar radiation, ensuring that a lesser amount is transferred into a room. Consequently, this helps maintain a cooler and more comfortable atmosphere.

Minimized Condensation

It is crucial not to overlook excessive condensation, as it can lead to the development of harmful mold, which poses significant health risks.

Proper ventilation is necessary to combat condensation. However, double glazing diminishes thermal transmittance, ensuring that the inner glass pane remains comparatively warmer than the outside. This mitigates moisture formation. Triple glazing takes this further with its exceptional thermal efficiency, reducing cold spots on the inner glass pane. As a result, condensation is notably minimized on the inside of windows.