Study on Energy-saving Technology and Design Optimization of Facade Retrofit Project of Existing Building in Cold and Severe Cold Area

In order to achieve building energy-saving,the facade retrofit project of the main office building of China Academy of Building Research was carried out.Based on the analysis of this retrofit project,the related problems that should be paid more attention and the corresponding measures to ensure the effectiveness and quality were put forward.It could be considered as the useful reference for retrofit design of similar projects.