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How to Fix and Prevent Roof Leakage in Light Steel Structures

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Roof leakage is one of the most common problems in light steel workshops and warehouses. It not only affects daily use but also causes internal corrosion, shortens the building’s service life, and leads to higher maintenance costs. Most leakage happens at panel joints, screw holes, flashing areas, or around openings. The main reasons are poor waterproof treatment, aging sealant, loose screws, or improper installation. To fix existing leaks, first clean the surface and locate the leakage points. Replace damaged or aging sealing strips. Re-tighten loose screws or replace them with waterproof self-drilling screws. Apply professional waterproof sealant at joints and openings. For serious cases, add a layer of waterproof coating to improve protection. To prevent future leakage, use high-quality roof panels and waterproof materials from the beginning. Ensure professional installation with standard flashing and sealing design. Conduct regular inspections, especially before rainy seasons, and ...
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Welded ball processing method

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  Welded ball Hot press moulding method Unloading: according to the design requirements, adopt semi-automatic gas cutting, profiling gas cutting, CNC flame gas cutting and other methods to unload the steel plate and cut out the round plate of suitable size, when unloading, it is necessary to reserve the welding shrinkage margin for fabrication and installation as well as the machining margins for cutting, edge planing, milling and so on. Heating: The blanks are heated uniformly to about 1050 ° C ± 50 ° C in a reflector furnace or resistance furnace after unloading. Pressing and moulding: Use hydraulic presses and matching convex and concave moulds to press and mould the heated slabs to produce hemispherical shapes. The demoulding temperature should not be lower than 650 ° C. After the hemisphere is pressed and moulded, the wall thickness should be reduced by not more than 13% and not more than 2.5mm according to the design and specification. Cutting bevel margin: can be processe...
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Inspection methods for welds

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  welding There are several ways to inspect the weld as follows:   1. Visual inspection: inspection by observing the shape, colour, defects, etc. of the weld with the naked eye.   2. radiological inspection: the use of X-rays or γ-rays on the weld can detect defects within the weld, such as porosity, inclusions and so on.   3. ultrasonic inspection: the use of ultrasonic propagation characteristics, through the ultrasonic scanning of the weld to detect internal defects in the weld, such as inclusions, pores, cracks, etc..   4. Magnetic particle inspection: Coat the surface of the weld with magnetic powder and apply a magnetic field to detect cracks, inclusions and other defects on and near the surface of the weld.   5. Penetration inspection: Coat the surface of the weld with penetrant, and through the penetration and colour development of the penetrant, detect cracks, inclusions and other defects on the surface of the weld.   6. Magnetic Field Inspect...
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