Causes and Prevention Measures of Leakage in Steel Structure Roof

 In Steel structure buildings, roof leakage is a common and significant issue affecting the quality of the structure. This article will elaborate on various reasons for roof leakage in steel structures and corresponding preventive measures.

 1. Forms of Steel Structure Roofs

   As the uppermost loadbearing and peripheral protective structure of a building, the roof's role is crucial. There are various types of lightweight steel structure roofs, including colored pressed steel plates, sandwich panels, etc.

 2. Connection of Roof Panels

  In steel structure buildings, roof panels are connected longitudinally and laterally. Longitudinal connections mainly employ overlapping, while lateral connections include overlapping, concealed buckle connections, and bite concealed buckle connections.

 3. Analysis of Leakage Causes and Solutions for Each Part

 ①Ridge Part: Leakage at the ridge is mainly caused by excessive ridge wave height, inadequate sealing of longitudinal overlaps, etc. Solutions include adjusting ridge cover plate width and enhancing sealing at overlaps.

 Roof Skylight Part: Leakage here is due to the absence of foam plugs and inadequate installation of outer panels. Solutions involve preinstallation of foam plugs and proper installation of outer panels.

 ②Skylight Panel Part: Mismatch between skylight panel and roof panel wave heights and insufficient length of longitudinal overlaps are main causes. Solutions include adjusting wave heights and increasing overlap lengths.

 ③Roof Opening Part: Leakage occurs due to lack of waterproof treatment and inadequate waterproofing around openings. Solutions include strictly following design drawings and adding waterproof measures.

 ④Eaves Part: Poor installation of outer panels and lack of waterproofing at eaves are main causes. Solutions include simultaneous placement of foam plugs and adding eaves sealing.

 ⑤Gutter Part: Leakage results from gaps in welded joints and mismatched gutter diameters. Solutions involve increasing gutter depth and proper diameter design.

 ⑥Connection between Brick Wall and Light Steel Roof Part: Leakage occurs due to cracks in silicone adhesive. Solutions include presealing and proper design of connections.

 4. Other Leakage Causes Analysis

 ①Design Reasons: Inadequate overflow measures and insufficient rainwater pipes can lead to leakage. Solutions include improving design specifications and proper rainwater system design.

 ②Improper Material Selection: Poorquality rainwater pipes and thin steel plates for gutters can cause leakage. Solutions include selecting suitable materials and enhancing quality control.

 ③Structural Measures: Inadequate waterproof treatment and large joint gaps can cause leakage. Solutions involve strengthening construction techniques and proper structural design.

 ④During Use: Overloading of roof purlins and aging of waterproof adhesives can lead to leakage. Solutions include regular maintenance and timely replacement of aging components.

Conclusion 

To comprehensively address roof leakage in steel structures, considerations must be made from design, construction, material selection, and maintenance. Only by effectively addressing these issues can the waterproofing effectiveness of steel structure roofs be ensured, ensuring building quality and safety.