Who is group a?


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.

Belisol serves the Belgian, Dutch and French markets via a franchising system.
Belisol windows and doors has grown into the largest doors and windows provider in Belgium and the Netherlands. In France, Belisol is also a byword for professional advice tailored precisely to your wishes, lifestyle and home.

KwadrO serves the Flemish part of Belgium via a franchising system. KwadrO was created to cover the remaining market for windows and doors, both in terms of geographic spread and market segmentation. KwadrO offers different products, appeals to another target group and presents a different image.

Both group a brands stand for sustainability, reliability and clarity. You will always receive expertise, quality and perfect service.

About Group a



We are always looking for talent to strengthen our team.

Contact us at info@group-a.com if you would like to send in a spontaneous application. In addition, keep an eye on our dedicated pages for vacancies:

Jobs Belisol
Jobs KwadrO
Careers Group a

Are you interested in becoming a franchisee?

Franchisees are motivated individuals who regard group a as a business development partner in the construction market. Group a offers the know-how and experience to launch a profitable business unit.

Group a franchisees are empathetic and ambitious figures who strive to expand the business within the boundaries of an established brand. They are highly-skilled individuals, with a respectable background, can motivate people and manage a team. They have a healthy work mentality and take on at least one executive task. Previous experience in the sector is not required.

Franchisees are committed to customer satisfaction – after all, they are fully aware that word of mouth produces the best prospects. The durability of the brand, and therefore of their own company, is closely linked to the end-customer experience.