1.0 IntroductionThe building is an important structure for humanity. In the general definition, building is a structure with a roof and wall, such as houses, factories and schools. The different typology of the building depends on the function, capacity and size. So it will give the different design and material in the building structure. For some buildings there are many defects that need to be considered for further action. According to the Building Code of Australia (nd), construction defects are buildings outside the warranty period, they may not conform to these standards but must be judged against the standard at the time of construction or renovation. Examples of defects are cracks, damage or deterioration of the brick wall and corrosion of aluminum windows. Furthermore, indoor air quality is an important factor in designing a good building. The air quality factor is the quality and comfort of the furniture and the degree of control the occupants have over the environment. Poor air quality causes human disease, it also leads to a loss of occupant productivity and the costs can exceed the additional initial cost, in case of new construction or renovation. It can also be short- or long-term and range from a mild irritation to a life-threatening illness. Sick building syndrome is a short-term effect as soon as people leave the building, and building-related illnesses are more serious than sick building syndrome because the building can pollute with dangerous chemicals can cause cancer and Legionnaires' disease. Improve indoor air quality by carrying out building maintenance, ventilation control and occupant activity control.1.2 Problem Statement1.3 Objective1.3.1 To study the causes of sick building syndrome.1.3.2 Identify typical symptoms of sick building syndrome.1.3... .... middle of paper ......a factor contributing to the growth of biological contamination is moisture on damp building materials which are ceiling, carpet and walls and poorly maintained. Additionally, various fungi and molds grow rapidly in warm environments. This contamination can be distributed into the air through inhalation by building occupants.2.1.1.4 Chemical contamination. Some solids or liquids produce a gas known as a volatile organic compound (VOC). Volatile organic compound (VOC) is the most common contamination of indoor air. Many chemicals have short- or long-term health effects. (Levin.H,2014) state that concentrations of many VOCs are consistently higher indoors (up to ten times higher) than outdoors. Sources of VOCs are carpet, photocopiers, detergents, manufactured wood products. Additionally, ambient tobacco smoke, unvented stove and fireplace will increase chemical contamination.