We are all used to calling windows plastic. In fact, this name is not entirely correct, since the profile is made not only of PVC. Moreover, PVC is located only on the outside of the sash, while the inside contains durable metal. Therefore, we can say with confidence that all modern window systems are metal-plastic .
It is very important that the manufacturer selects high-quality metal filling for his design. This is exactly what the famous German manufacturer rehau did. Why is the quality of metal in plastic windows important? What exactly does it affect?
- Strength . In order for the profile to maintain its shape for a long time, not to bend over time (for example, when a house shrinks or in a strong wind), reliable window reinforcement is required. The main reinforcing material will be steel installed inside the profile.
- For durability . Each sash undergoes more than one thousand openings and closings during its period of operation. Therefore, over time, some of its elements may wear out. When will this time come? The answer to this question can be obtained based on the quality of the profile filling. The stronger the material, the less likely its base will wear off and fail after a few years.
- For warranty period . Knowing that the inside of the windows is not the most reliable filling, the manufacturing company is unlikely to give a long-term guarantee for the sash. Have you often seen how one manufacturer gave a 5 year warranty and another 15? Externally, their products may be similar, but the internal equipment is different, which means that the obligations to the buyer also differ.
- For the smooth operation of the fittings . The handles that complement the rehau windows are very easy to open and close, fix without problems in the desired position and do not require much effort from the user. In part, all this is possible due to the high strength of the metal. In fact, all accessories are held exclusively on it.
- Per structure weight . The difference between the weight of different window systems can be significant. The metal frame is of varying strength and weight. good plastic sashes cannot be too light. This suggests that inside them is not the best and most durable filling. It is unlikely that one person can cope with the installation of good-quality glazing, because he additionally needs the support of a window frame with a large mass.
