15/05/26

Understanding PVC Window Opening Mechanisms

PVC windows have long become a familiar feature of modern homes — and their convenience largely depends on the opening mechanism. Let’s look at the main options so you can choose the best one for your needs.

The simplest and most traditional option is a fixed window with no opening mechanism. It offers maximum light transmission and the best thermal insulation, but doesn’t allow for ventilation. Such windows are usually used in combination with opening sashes or in places where ventilation isn’t required.

A swing mechanism lets you open the sash inward at a 90° angle. This provides full air flow, but when open, the sash takes up space and may get in the way — especially if there’s furniture nearby. This option works well in spacious rooms.

More versatile is the tilt‑and‑turn mechanism. It combines two modes: classic opening and top‑hinged tilting for ventilation. This way, you can adjust the air exchange intensity and avoid draughts. It’s the most popular choice for living spaces.

The tilt‑only (transom) mechanism is often found in tall windows or on upper floors: the sash tilts inward from the top, making it convenient and safe. This opening method is good for ventilating without a strong air current.

For narrow openings and balconies, sliding systems are a great fit: the sashes move along guides within the frame. They save space but are somewhat less effective in terms of thermal insulation compared to other types.

Finally, the stulp mechanism allows you to fully clear the opening when both sashes are opened inward — there’s no vertical partition between them. This creates a panoramic glazing effect and is convenient for moving large items in and out.

The choice of opening mechanism depends on the room’s purpose, the size of the opening, and your personal preferences — the main thing is to ensure the window serves you comfortably!