1. The main reason for the leakage of steel roof ridge vent is: no foam plug is placed under the edge of the ridge ventilator and the roof junction, and the longitudinal overlap of the edge is not laid for waterproofing; the outer roof panel is not installed at the junction of the natural ventilation system; the openings of the structural pillars are not waterproofed.

2. FRP daylighting board waterproofing is an important part of the waterproofing of steel structure workshops. The cement laying and waterproof screws in the installation of FRP daylighting board are the main hidden dangers of roof leakage; the FRP daylighting board type does not match the roof board type, and the FRP daylighting board is higher than the roof panel. After installation, the sealing is too tight to form a pressure difference between the inside and outside of the daylighting panel. Capillary water leaks into the roof from the gaps on both sides of the FRP daylighting panel; the longitudinal lap length of the FRP daylighting panel is not enough, and the cement aging loses its viscosity; longitudinal The glue falls off; the FRP daylighting board and the color steel plate are rigidly overlapped, and the gap in the middle is not sealed, etc.

3. The main reasons for water leakage at the ridge of the steel structure factory are: the crest at the ridge is too high, and the roof ridge cover cannot guarantee waterproof; the longitudinal lap is not installed for waterproofing, forming a gap and leaks; the longitudinal lap of the ridge cover is connected by rivets, and thermal expansion The cold shrinkage strength is not enough and the rivets are broken, causing water leakage; no plug is laid between the roof ridge cover and the roof panel, or the plug is placed irregularly and falls off to cause water leakage.