Reason for water seepage on the roof of a steel structure factory

At present, most of the steel structure plant enclosure system is using color steel sandwich panel wall and roof, but due to a variety of reasons, caused by the plant roof leakage phenomenon of a lot of, to our production has brought a lot of inconvenience. I summarized the reasons here, there are three main aspects: human factors, roofing itself, design factors of factors.

In terms of human factors: the selection of the poor quality of the plate, in the transportation or installation process caused by the deformation; self-tapping wire gasket quality is poor, aging fast; roof sealing effect is poor; construction process is not reasonable, the workers technology is not pass ……

From the roof itself factors: due to seasonal changes, the temperature difference between the rise and fall will also lead to thermal expansion and contraction caused by the fasteners of the loosening of the gap between the color steel sandwich panels increased, deformation, resulting in water leakage phenomenon; the structure of the thermal expansion and contraction of the force generated by the role of the two ends of the steel beams or columns corrosion phenomenon; rainy season, due to the windy weather caused by the rainwater flow; dew phenomenon, outdoor condensation will be Accelerate the aging speed of the roof, causing corrosion and paint removal, etc., which will also make the roof panel of the steel structure factory appear water seepage phenomenon.

From the design factors: the design of gutter can not meet the drainage of larger rainfall, fewer downpipes or smaller caliber, resulting in poor drainage formed by the phenomenon of backflow; the slope of the roof is small, the span is large; tapping screws in the fixed parts of the leakage, water return design is unreasonable; the failure to use waterproofing materials …… thus resulting in the steel structure factory building The phenomenon of water seepage will occur in the roof panel.

In order to guarantee that the roof of steel structure plant does not leak and seepage, we need to do a good job in the following aspects: reasonable design of the gutter and drop opening that can solve the maximum rainfall of the local hydrology; dissolve the structural deformation of the steel structure due to thermal expansion and cold contraction; have a waterproof layer that is resistant to high temperature, oxidation, and ultraviolet rays …… which is in the steel structure plant experience in construction is organized for reference only.