And we are offered to simply overlap stickers.

Such a profile is vulnerable, especially in winter, and can easily be damaged when impact, which leads to low -quality installation. Another important point in installation is to set the window in level in the opening. But this profile is very reminiscent of a wave, and it is hard to do. Why do we need such a profile, because it is thin -walled. And we are offered to simply overlap stickers. Consumers and conscientious window production companies suffer from such bad manufacturers.