FAQ

What is the thermal insulation capability of polycarbonate sheets?

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The Ug-value, previously referred to as the K-value, measures the extent of heat transfer through the sheets. A smaller Ug-value indicates superior heat retention properties. The insulation efficiency of polycarbonate sheets significantly relies on their structural configuration. Solid polycarbonate sheets exhibit Ug-values roughly equivalent to that of glass at similar thickness levels. Meanwhile, multiwall polycarbonate sheets can present enhanced Ug-values reaching as low as 1.4 W/m²K. Optimal performance is noted in multiwall sheets incorporating numerous internal layers and complex designs.

Conversely, in warmer months, you may prioritize materials that minimize heat ingress. For this scenario, the shading coefficient (SC), visible light transmission (Tvis), and solar energy transmission (Rsol) become crucial metrics. Ideally, one should select materials that allow substantial light infiltration (high Tvis) while effectively blocking solar heat (low Rsol and SC). The interplay of these two contrasting characteristics is quantified via the selectivity index: a higher index signifies considerable visible light while restricting heat flow. Providers offer unique polycarbonate sheet varieties tailored for enhanced thermal reflection during warmer periods. The dual benefit of efficient insulation in both summer and winter distinctly characterizes these multi-wall sheets.

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