Double glazing. When choosing a metal-plastic window, it is important to focus on the quality of a double-glazed window, which differs in: the number of glasses (respectively, the more of them, the more reliable the noise insulation and the higher the energy saving; the best option is a two-chamber option); type of glass (manufacturers offer various options, including incandescent and energy-saving ones, be guided by your own individual needs when choosing).
To reinforce the plastic profile, special steel inserts are used, which are mounted directly into the main chamber of the PVC profile. The thickness of steel reinforcement in translucent PVC structures according to GOST should not be less than 1.5 mm.
You should make sure that the seller has a certificate for PVC windows, you can additionally request certificates for the profile and other components of the window unit.
PVC used for the production of profiles has a number of features that manufacturers are constantly struggling with: 1. Sufficiently high linear expansion, reaching several millimeters per meter of length. In order to compensate for this phenomenon, it is necessary to leave special gaps, use reinforcement and correctly calculate the number of fasteners. The same feature of the PVC profile limits mamaximum dimensions of window structures. 2. Low coefficient of elasticity, but even at the factories it is leveled by the use of metal inserts and the correct calculation of the thickness of the inner walls, which are stiffeners. 3. Insufficient temperature stability and UV resistance. Manufacturers also learned to deal with this drawback by introducing special modifiers and stabilizers into PVC, which preserve the color and structure of the material. In high-quality windows, such additives serve no less than the entire structure. They are, in most cases, completely harmless to humans. But if the frame emits a pungent smell that does not disappear for a long time, do not buy this window. It used lead or cadmium, or even more dangerous chemicals, instead of harmless zinc and calcium.
The choice of plastic windows is also connected with aesthetic demands: it is no coincidence that windows are the eyes of the house, so they must be beautiful! What plastic windows are better? We choose according to the profile, double-glazed windows, fittings How to choose plastic windows. Responsive sets of the above criteria. High quality parameters (and priority - technical safety) must meet all individual structural elements, namely: profile; glass fittings.
The dimensions of double-glazed windows (glass thickness) also affect the final characteristics of the entire structure. Noise protection will be higher if the outer glass is thicker than the others.
Wooden frames need periodic updating of the paintwork, maintenance of PVC windows is not required. And plastic windows are easier to clean than wooden ones.
Well-known manufacturers of high-quality plastic windows, as a rule, complete products with high-quality seals that are resistant to deformation, soft and elastic.
Good installation Consider, even if you have purchased a window with a bunch of bells and whistles, you may install it incorrectly, as a result of which all the saved heat will go into the gap between the profile and the wall. Specify the qualifications and experience of the installation team, as well as the measurer.
Decorative possibilities of profiles The characteristic white color of metal-plastic windows is becoming less and less popular. It is replaced by a variety of colors that imitate precious wood species or simply monochromatic according to the RAL scale or other color fans of leading paint manufacturers. Decorating the profile somewhat increases the cost of the finished assembly - the difference can reach 15 - 20%.