Daylight performance of colonial houses in Surabaya

The present study explores and evaluates daylight performance of colonial houses in Surabaya. It is a prelimanary study that is aimed to further extent the knowledge regarding the daylight conditions in the colonial houses which is limited and previously arised only by small number of studies. Daylight condition of the building is collected through a field measurement which is conducted in four colonial houses in Surabaya during the dry season. The daylight factor of the building is then analyzed and evaluated to indicate the daylight performance of the houses. The study found that not all of the colonial houses under study were able to suffice the minimum daylight requirements for domestic activities. Good daylight performance can be achieved by the building design and the appropriate utilisation schedule of window. Design strategies used in the colonial house reflect the adapatability of the building to the warm humid climate of Surabaya.