PRANCE metalwork is a leading manufacturer of metal ceiling and facade systems.
How Do Aluminum Cladding Wall Panels Perform in Coastal Environments?
Coastal environments expose aluminum cladding wall panels to salt spray, high humidity, and wind-driven moisture, increasing corrosion and finish degradation risk. To ensure long-term performance, start with marine-grade aluminum alloys (e.g., 5000 or 6000 series) featuring high magnesium content for improved pitting resistance. Next, specify robust surface treatments: anodizing (Class II or Class III per MIL-A-8625) or fluoropolymer (PVDF) coatings with proven salt spray resistance (ASTM B117 testing for at least 1,000 hours without significant creep or blistering).
Detailing plays a critical role: use sealed, drainable cassette systems that prevent water retention behind panels. All fasteners, brackets, and support structures should be fabricated from 316 stainless steel or coated aluminum to avoid galvanic corrosion. Maintain minimum 6 mm clearance between dissimilar metals and ensure proper drainage paths. Joints and through-wall penetrations require neoprene gaskets and marine-grade sealants rated for continuous outdoor exposure.
Implement a maintenance protocol with semi-annual inspections of critical interfaces, especially at panel terminations and sealant joints. Wash panels quarterly with fresh water to remove salt deposits, and touch up scratches promptly with compatible coating repair kits. By combining alloy selection, high-performance coatings, careful detailing, and routine cleaning, your aluminum cladding will withstand the challenges of coastal climates while retaining aesthetic appeal.