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

Where entrepreneurship meets excellence

Group a is a Belgian family-owned company, founded in 1977 by Eugène Alen. We commercialise and offer a large range of quality windows and doors in PVC, aluminium and wood via a franchising network for our two brands, Belisol and KwadrO. Group a provides a complete concept based on market needs to service and delight the private customer.

About us
About Group a

Our brands

Logo Belisol

Belisol is the market leader in Belgium and the Netherlands – and we do not take this responsibility lightly.

About Belisol

KwadrO consists of a dynamic and entrepreneurial network of more than 20 showrooms all over Flanders.

About Kwadro
Logo KwadrO