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Jalusi
BUILDING MATERIALS & CONSTRUCTIONbeginner
Definition
Louvre or jalousie — a shading element consisting of horizontal slats (fixed or operable) that control solar radiation and visual privacy while allowing ventilation and daylighting. Jalusi is made from timber, aluminium, or plastic and is a key passive climate control element in Indonesian tropical architecture, allowing natural ventilation while shading windows from direct sun.
Example
An Indonesian house uses fixed timber jalusi on its west-facing windows — the 45° slats angled to block the harsh afternoon sun while allowing air circulation and diffuse light to enter the interior.