Building control have in recent years made window and door u-values an important factor when applying for planning permission. Schuco bifold doors, windows, patio and residential doors achieve the necessary values to satisfy both the planning office and building control.
![biflod-door-u-values Bifold Door U-Values](https://www.slideorfold.co.uk/wp-content/smush-webp/2017/01/biflod-door-u-values.png.webp)
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