Thanks to the modern technology, Koemmerling uPVC window and door profiles will practically last forever. For this reason, they are an excellent investment for your home as they do not involve any future maintenance costs. Furthermore, combined with modern thermal insulation glass, Koemmerling profiles will help to achieve a sustainable energy saving effect and are, therefore, an even better investment. Koemmerling uPVC window and door systems do not require regular repainting and expensive maintenance. They do not rot, warp or corrode even in tropical and salty coastal climates. Therefore, their maintenance is reduced to simple cleaning and does not involve any further costs.