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What causes curtain wall leakage in high-rise buildings?

Leakage in curtain walls of high-rise structures—such as those in Bahrain or Dubai—can stem from several interrelated factors. First, improper installation of aluminum framing can lead to misaligned mullions, creating gaps that allow driven rain to penetrate. Second, degraded or improperly selected gaskets (EPDM, silicone) lose elasticity under Gulf-region UV and temperature extremes, failing to seal against water. Third, insufficient flashing at slab edges and spandrel panels permits capillary action to draw moisture inward. Fourth, neglected maintenance—especially after seasonal rains in Muscat—lets dust and debris clog weep holes, preventing drainage. Fifth, thermal movement of large curtain-wall assemblies can stress anchor points; without proper sliding plates or thermal break allowances, seals tear. To prevent leaks, partner with aluminum curtain-wall specialists who use high-quality sealants, conduct water-penetration mock-ups per ASTM E1105, and coordinate maintenance protocols alongside aluminum ceiling warranties.


What causes curtain wall leakage in high-rise buildings? 1

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