A bottle tjebok is a decorative perforated brick wall featuring bottle-shaped openings, originating from the Indonesian-Dutch colonial architectural tradition of the Netherlands East Indies. The term “tjebok” (also spelled “cebok” or “cibok”) refers to a ventilation screen or lattice wall in Javanese building practice, and the “bottle” prefix describes the distinctive shape of the openings.
Application
Bottle tjeboks were developed as a practical and aesthetic response to tropical building challenges:
- Natural ventilation: The bottle-shaped perforations allow continuous airflow through the wall, essential for cooling interiors in Indonesia’s hot and humid equatorial climate without mechanical systems.
- Rain protection: The narrow neck of the bottle-shaped opening limits the entry of wind-driven rain while still permitting air passage — a significant advantage over simple rectangular openings.
- Light filtering: The perforated pattern admits diffused daylight into interior spaces while reducing direct solar heat gain and glare.
- Privacy screening: The wall provides visual separation between public and private zones while maintaining air circulation — important in both domestic and institutional colonial buildings.
- Decorative expression: The repeating bottle motif creates rich shadow patterns that change throughout the day, adding visual interest to otherwise plain masonry facades.
Bottle tjeboks are constructed using standard-format bricks laid in specially shaped moulds or carefully cut and arranged to form the bottle profile. They are typically found in colonial-era buildings across Java, Sumatra, and other Indonesian islands dating from the 18th through early 20th centuries. Examples appear in warehouses, barracks, plantation houses, and institutional buildings. The technique represents a fusion of Dutch brick construction knowledge with indigenous Javanese ventilation traditions, and it remains studied as an example of passive climate design in tropical architecture.
Related terms
- Ventilation screen
- Perforated brick wall
- Colonial architecture
- Passive cooling
- Lattice wall (roster)
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