Today the topic of plastic windows is very popular. There are many Internet resources, on the pages of which people share their impressions and tips regarding a particular version of this popular products. On the Internet you can find articles about windows, there are a large number of specialized sites devoted to various issues related to the acquisition of PVC windows. Let’s look at some frequent situations that are related to the sale of modern windows. For example, if you are offered a very large discount, you should not rush with the acquisition. Those companies that sell world-famous brands will never allow themselves to lower the cost of more than three to six percent. In simple words, they are trying to “shove” the non-excess, or this product cannot be called truly high-quality. Modern window constructions, which are advanced by the environment, should be performed at the highest level of reliability. And, of course, not all models that exist today on the market are able to withstand this. When choosing a window manufacturer, you need to pay attention to the availability of warranty obligations of the company. Certificates and licenses for production and installation activities are required. Among other things, the manufacturer should have existing windows, as well as cuts of existing profiles. This is necessary to understand what quality of the material can be offered to you. High -quality products can be identified by the fact that it has a stigma and logo of the company, which are applied along the perimeter of the window frame. So, German windows always possess a special quality sign applied to them. Solid companies also numb all products.