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10/03/26
A PVC window isn’t just glass in a frame — it’s a well‑thought‑out system of interconnected elements, each playing an important role. Let’s explore how a modern window is built and what makes it a reliable shield against cold, noise and bad weather.
The foundation of the structure is the PVC profile with a multi‑chamber design. Inside it sits a reinforcing steel insert that provides rigidity and resistance to loads. The number of chambers (typically 3 to 6) determines the window’s thermal and sound insulation properties.
The main “shield” against external factors is the insulating glass unit, made of two or three panes with air or gas gaps between them. It’s responsible for letting in light, retaining heat and protecting against street noise.
Seals around the perimeter of the sash and frame create a tight barrier: they prevent draughts and protect against moisture and dust. High‑quality seals stay elastic for years, withstanding temperature fluctuations.
Hardware is the window’s “nervous system”: hinges, handles, locks and opening mechanisms ensure smooth and reliable control of the sashes. Its quality determines how convenient the window is to use and how long it will last.
Completing the design are the drain sill (which directs water away from the outside), the window sill (expanding the functional space inside) and the reveals (finishing the opening and improving thermal insulation).
All elements work as a single mechanism: the profile sets the shape, the insulating glass unit provides insulation, the seals ensure tightness, the hardware enables control, and the additional parts complete the picture. It’s this interaction that makes a PVC window reliable, comfortable and durable.

Which kind of windows would you prefer If you were going to replace the old ones in your house or apartment?