Sliding or casement windows? Here's an honest comparison of the two most common styles.
A slider's panels glide along tracks, needing no swing space. A casement hinges outward like a door, opening fully and sealing tightly with multi-point locking against the gaskets.
The honest rule of thumb: casement where you have the space outside and want the best sealing and airflow; slider where swing space is tight, or on a balcony where a swinging sash would be a nuisance.
Casement opens fully and seals tightest with multi-point locking — best where you have swing space outside. Slider needs no swing space, suiting balconies and tight spots.
Casement — the hinging action lets multi-point locking pull it tight against gaskets all round. Good sliders seal well too, with quality interlocks.
Casement — it opens its full area. A slider opens about half the width at once.
Related guides covering this topic from other angles — different products, applications, or contexts.
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