General agency Wisniowski Switzerland

The headquarters of Grissmann GmbH is located in Effretikon and deals with the sale and installation of very high quality windows, garage doors, doors and fences and offers exclusive solid wood furniture. We offer professional assembly and disassembly of all types. Our company has been on the market for 10 years, formerly known as Lässer-Fenster GmbH, since April 2023 you can find us under the name Grissmann GmbH. We are the general agency of the company Wisniowski, which has more than 2,500 employees, has been providing its services for more than 30 years and today delivers its products to all European countries