The official app of Koetter-Mers GmbH of Gronau.

Our traditional joinery master company is now in its third generation and offers a broad portfolio of services. Customized windows of wood, aluminum or plastic, matching shutters and individually adapted insect screens in all sizes and shapes are also included. But even with our doors you opt for unique quality products. Repairs, interior design and building terraces are PARTNUMBERS strengths of our master operation. And if you want to get to know us, you can call, but of course our app with us contact. Here we go!