Abstract
Glass is a common material used in buildings, mainly for penestration purposes. Although the physical properties and performance data of the wide variety of glass can be easily obtained from technical literature, their performances under specific environmental conditions are not commonly known. While the technical literature presents performance data under laboratory conditions, the same under ambient conditions are not available. However, the post application performance of glass largely depends on the external environmental conditions. This paper attempts to understand the performance of popularly used variety of glasses under tropical urban climatic conditions of Sri Lanka. It presents the' findings of an experiment conducted under ambient conditions, using a scaled model of a typical office building.