Causes of leakage of color steel roofing sheet

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juniperqq

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https://www.chinahengzesteel.com/ppgi-corrugated-roofing-sheet/,
The slope of the color steel plate is generally small, often below 6%. This kind of structure is more common in water leakage in areas with more rain, and there is a large area of ??leakage, leakage between the lighting window and the roof. When it is used to control the leakage of roofing of color steel plates, it is necessary to analyze and understand the structure, leakage points, and causes.
In general, the leakage of low cost color-coated corrugated roofing sheet is mainly due to factors such as self-tapping screws, color steel plate lap joints, ridge tiles, core rivets, deformation of color steel plates caused by roofing people, and rain-proof rubber falling off of decorative parts such as lighting windows. caused. Correspondingly, the leakage points can be mainly divided into the following points:
1. Water leaks from the screws and fasteners on the roof. This phenomenon mainly occurs in double-layer color steel plates and single-layer color steel plate roofs. During the construction process, the tapping force is too heavy and too light, and the self-tapping rubber gaskets may be deformed due to the deviation of the screws and the skewing. Falling off or forming a concave surface, causing the roof to leak water and accumulate through the insulation cotton, accumulating less and forming more water leakage. In addition, the self-tapping position is not correct, and it is one of the important reasons for water leakage to directly from a hole under the low price color corrugated steel sheet. This water leakage phenomenon may not be obvious in the roof structure where the single-layer color steel plate does not have an insulation system, mainly because the rainwater is directly dispersed after being leaked through the contact portion between the steel plate and the stringer, and does not necessarily drip quickly.
2. The water plate overlaps the water. Horizontal lap joints and vertical lap seams, water grid lap joints leaking water, if the color steel plate wavy is too low or the amount of rainwater is not over the wave, it is easy to form a large area of ??water leakage, and it is not easy to detect the water leakage point, once formed It is not easy to overhaul. This situation is more common in curved roofs. The main reason is that the two plates are not tightly connected, the self-tapping is not full, and the gap is formed.
3, the roof tile leaks. In the construction of light steel roofing, water leakage caused by ridge tiles is also a common phenomenon. In the rainy season, especially when the amount of rain is large, the splash of rain passes through the gap between the two color steel plates in the lower part of the ridge tile, forming a large area of ??leakage.
Posted 07 May 2019

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