在我国,既有建筑建成的年代一般都比较早,部分建筑结露发霉情况严重,虽然建筑能耗很高,但保温效果却很差。尤其是北方采暖地区的既有建筑,虽然数量仅占全国的10%,但冬季采暖能耗却占到全国建筑能耗的40%。因此,既有建筑节能改造工作“十一五”期间以北方地区为重点,“十二五”期间仍以北方地区为重点。“十二五”期间,北方地区有35亿平方米的既有建筑需要进行节能改造。由此可见, In our country, the built-up period of the existing buildings is generally earlier, and the moldiness of some buildings is mildewed. Although the energy consumption of buildings is high, the thermal insulation effect is very poor. In particular, the existing buildings in the northern heating area, although the number of only 10% of the country, but the winter heating energy consumption accounts for 40% of the national building energy consumption. Therefore, the existing energy-saving renovation of buildings should focus on the northern areas during the 11th Five-Year Plan period and focus on the northern areas during the 12th Five-Year Plan. During the 12th Five-Year Plan period, 3.5 billion square meters of existing buildings in the northern part will need energy-saving renovation. Thus,