A study on effects of energy saving by applying complex insulation integrated the soft material in apartment house

As environmental issues are rapidly gaining more and more interest globally, various measures and standards are being set to minimize the use of energy in the architecture field, which consists about a fourth of the total use of energy. Korea, like other developed countries, is also aiming to make zero-energy buildings mandatory(by 2025) implementing various measures such as energy efficiency rating system and energy performance certification systems to gradually minimize energy consumption in buildings. 
Most residential buildings of Korea are constructed using box frame using concrete walls as bearing walls and the formation of the structure is done by steel reinforced concrete. Legally obligated insulation design is mainly based on internal insulation structure with easy construction method. This design is constructed by installing an insulating material on the interior of structure. Rigid urethane with light weight and excellent waterproof property is most widely used as an insulating material in residential buildings. But rigid urethane insulating material has a concern of creating a gap when attached to the surface of concrete with uneven finishing surface due to lack of flexibility. In order to resolve such problem, this study intended to develop a complex insulating material. This material integrates an insulating material with a soft material, which acts as a buffer between the wall with uneven finishing surface and the insulating material.