How does ACP cladding’s moisture resistance compare to gypsum board?

Aluminum composite panel (ACP) cladding offers superior moisture resistance compared to gypsum board, making it an ideal choice for exterior facades and high-humidity interior spaces. ACP consists of two thin aluminum skins bonded to a core material—often polyethylene or fire-rated mineral core—which forms a continuous, non-porous barrier. Water cannot penetrate the sealed joints and through-fastened connections when installed correctly with rubber gaskets and silicone sealant. In contrast, gypsum board is inherently porous due to its paper facing and gypsum core. Prolonged exposure to moisture causes gypsum boards to swell, soften, and lose structural integrity. Even moisture-resistant variants require sealed joints and protective coatings to approach ACP’s performance. Moreover, ACP panels are available with factory-applied PVDF or polyester coatings that further enhance water repellency and prevent staining or mold growth. For aluminum ceiling systems in damp areas—such as spa lobbies, pool enclosures, or outdoor sunrooms—ACP’s stable dimensional tolerance under wet conditions ensures long-term elegance without sagging or blistering. Overall, the non-absorbent nature and engineered sealing methodology of ACP cladding translate into maintenance-free, weather-tight performance that gypsum board simply cannot match in moisture-prone applications.