It is because of the poor quality of fittings that buyers of PVC windows face the following problems: jamming of the sash; opening the window only with effort; blowing due to the inability to tightly close the sash; creak.
Important! The reliability of the entire structure depends on the type of profile. They are made of PVC and at first glance look the same. Thermal insulation is provided by internal air chambers, and metal reinforcement guarantees strength. The higher the profile class, the greater the thickness of the outer wall.
Choice of accessories and equipment When choosing accessories for windows, you should pay attention to their material, colors and functionality. You can choose metal-plastic windows and order roller shutters, blinds, mosquito nets for them. If necessary, window sills, slopes and ebbs can be added to the package.
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.
What you need to know when choosing fittings for windows Fittings are the last of the three elements that make up modern windows. This is not only a handle, but also a system of mechanisms that open and close windows in one mode or another. The fittings are made of metal alloys, and you should not save on them. The better the material (such as, for example, alloy steel), the easier the fittings work, the less force must be applied when opening / closing the window, and the longer the service life of the products themselves.
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).
They also do not spoil the appearance of the window - as a rule, the holes are completely invisible or closed with decorative plugs. If it was not possible to find such technological holes on the front of the window, then you have a not very high-quality design that will last much less than the established period.
types of opening of shutters of plastic windows Deaf windows. Stationary construction of a frame and a double-glazed window. Blind windows do not have fittings and do not open. Most often they are installed as an element of a multi-leaf window or as a showcase. Tilt and turn window. This is the standard and most common type of opening, it is suitable for houses and apartments. The mechanism opens in a horizontal and vertical plane, it is suitable for rectangular, arched and trapezoidal structures. With this option, micro-slit ventilation is possible. Fanlight (windows with a transom). Shtulpovye windows (oar). Their shutters open in one plane and, as a rule, open into the interior of the room. Sliding blocks. Such windows are the right choice for rooms with limited space. They are ideal for glazing loggias and balconies.
If a company offers a mega-durable functional window from a thick branded profile frombloody "ridiculous" price (and with 100% prepayment of work) - at least you should be wary.
Polyvinyl chloride itself for windows was not chosen by chance. This synthetic material is distinguished by: high weather resistance; low coefficient of thermal conductivity; low cost of production; environmental friendliness; excellent adhesion to most types of paints and varnishes; durability (at least 50 years of preservation of the main properties); weak conductivity of sound vibrations.