How to choose a plastic box?

So you are bored with the endless drafts, dust and noise from the street outside. Agreed - need to put plastic windows. Especially because their prices are quite affordable and the selection is such that the eyes diverge. So how do you avoid mistakes when choosing new windows? The first thing to nick down - cheap good does not happen. Quality materials and installation can not cost much cheaper than the flail on the market. So, immediately cut off such proposals, and we continue to understand more. Next ask the manager of the company to demonstrate the quality certificates. Certificate DIN EN ISO 9001 says that the quality of the plastic windows offered by the company is at a stable level. Certificate of Conformity (GOST) means that the product meets the claimed physical and chemical properties. Another good idea to check the resolution of the Ministry of Construction and the Ministry of Health to apply zavyalennogo PVC profile in our climate. In general is to clarify the origin of plastic, from which is made of PVC profile. Product produced in warmer countries - Turkey, for example - may well conform to their standards of quality, but cracked under our sub-zero temperatures. Making sure that the company claims the quality of the case. continue to understand more. Profile, which is made from plastic windows can be imported or produced domestically. Imported, of course, preferable. The best is German. Reinforcing profile (seen in the exhibition cut windows) should be made of galvanized steel not less than 1,5 mm. You can certainly agree on the reinforcing profile of black metal, but then get ready for the fact that sooner or later he will start to rust, and on your beautiful little white boxes appear red streaks near the drainage holes. In the profile you are using must have at least three cameras - both in the frame, and a sash window. And in the windows - at least two air chambers, a Russian winter here has specific requirements. The thickness of the glass should be not less than 32 mm - the same reason. The glass must be polished. If you prefer, you can select windows with a special heat-reflecting coating which reduces heat losses to nearly zero. Hardware - is also very important thing. Patriotic fitting normal quality, unfortunately, does not exist in nature. Best at the moment is a German furniture production. But even the most ideal window for Faulty installation lose all their advantages. Mount plastic box should the same firm in which you buy them, except in the case of any problems will be very difficult to find the culprit. Setting the frame is adjusted to plumb. All the cracks between the frame and the wall are filled with foam. Pena also need to be covered with sealing material - otherwise it collapses under the action of the sun and air. The last part - the guarantee. The optimum period of 1 year to 10 years.