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Group a is an international franchise organisation in the market of windows and doors and owner of two brands – Belisol and KwadrO - active in Belgium, the Netherlands and France


Belisol is the market leader in Belgium and the Netherlands – and we do not take this responsibility lightly. Our aim is to provide our customers with a carefree installation or renovation of their external doors and windows – with a result they can be proud of.


KwadrO consists of a dynamic and entrepreneurial network of more than 20 showrooms all over Flanders, whose employees are passionate about the business.