What are the different window opening systems, and what does each suit? Here's a plain guide.
Windows open in a handful of distinct ways, and each suits different space, ventilation, and sealing needs. The right one depends on the room and what's outside the window.
The choice usually comes down to what's outside the window. Swing space outside means casement; balcony or narrow gap means slider; want ventilation in the rain means awning or tilt-and-turn.
Sliding (glides on tracks), casement (side-hung), tilt-and-turn (tilts or swings inward), awning (top-hung), fixed (non-opening), and sash (slides vertically).
Usually determined by what's outside — swing space means casement, a balcony or narrow gap means slider, wanting ventilation in rain means awning or tilt-and-turn.
Casement and tilt-and-turn, thanks to multi-point locking pulling the sash against the gaskets all round.
Related guides covering this topic from other angles — different products, applications, or contexts.
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