廊坊市安次区财政局住宅楼、第八中学教学办公楼及综合实验楼近5000m2屋面防水工程中应用排气屋面做法后,均未出现防水层起鼓、渗漏现象。具体做法如下:(1)预制排气管　用直径50mm的焊管焊制180°弯头,内外做防腐。用10钢筋与排气管下端焊接做90°弯勾支撑脚,并防腐(见... After the exhaust roofing method was applied to the nearly 5000m2 roofing waterproofing project in the residential building of the Finance Bureau of Anxi District, Langfang City, the eighth middle school teaching office building and the comprehensive experimental building, there was no evidence that the waterproof layer had caused a drum or leakage. The specific methods are as follows: (1) Prefabricated exhaust pipe The 180° elbow is welded with a welded pipe with a diameter of 50 mm, and the inside and outside are protected against corrosion. Use 90 steel rods and the lower end of the exhaust pipe to make 90° hooks to support the feet, and antisepsis (see...