The significant defects on concrete flat roof at high-rise building

The construction of high-rise buildings is rapidly growing in Malaysia due to the limitation of land, especially in the urban areas. In addition, the concrete flat roof is frequently used in the construction of high-rise buildings in Malaysia. It is because the pitched roof is seen to be disproportionate to any tall building from a philosophical standpoint. The concrete flat roof defects in high-rise buildings give critical impacts on the performance and life cycle of the buildings in the future. The roof is the main element of a building that protects the occupancy from the weather. The roof has high exposure to the weather. Therefore, improper design and constructability of the concrete flat roof would lead to poor performance of the roof of the buildings. This study aims to identify the significant defects of concrete flat roofs in high-rise buildings. The objective of this research study is (i) To determine the significant defects of concrete flat roofs in high-rise buildings, (ii) To identify the factors that contribute to concrete flat roof defects, and (iii) To propose strategies for reducing the significant defects that occur on concrete flat roofs in high-rise buildings. This research study was conducted by implementing a quantitative method, which consists of a questionnaire survey to acquire data. A total of 196 questionnaires had been distributed to the contractors' companies Grade 1 to Grade 7 who specialized in roof construction in Kuala Lumpur.