group a Information

group a is an international franchise organisation active in the exterior joinery sector, founded in 1977 by Eugène Alen. With our brands Belisol and KwadrO, we build strong networks of local entrepreneurs in Belgium, the Netherlands and France. Together, we deliver high-quality windows and doors in PVC, aluminium and wood to thousands of families. We strengthen our franchise partners through a structured professional framework: a well-considered product range, strong marketing support, targeted training programmes, efficient processes and digital tools. This allows them to focus on where they truly make a difference: sales, craftsmanship and customer satisfaction. Today, the second generation of the Alen family leads the organisation. group a combines a strong family-driven DNA with a clear vision for the future, where digitalisation, data, leadership and entrepreneurship take centre stage. Together, we build sustainable growth and strong brands in exterior joinery.