When selecting a rattan sofa set for high-humidity environments, Hongyi Outdoor Furniture Factory strongly recommends frames constructed from premium aluminum or stainless steel. These materials provide exceptional corrosion resistance, ensuring your outdoor furniture remains durable and visually appealing in coastal areas, tropical climates, or regions with frequent rainfall. Aluminum frames offer lightweight stability with powder-coated finishes for added protection, while stainless steel provides superior strength with chromium content that prevents rust formation. Both options perfectly complement synthetic PVC rattan weaving, which resists moisture absorption, mold growth, and UV damage. For optimal performance in humid conditions, Hongyi suggests their 6061 aluminum series with reinforced corner joints and 304-grade stainless steel models with waterproof coating technology. These frame selections maintain structural integrity without warping, cracking, or discoloration, making them ideal for poolside installations, beachfront properties, and covered patio applications where moisture levels consistently remain high.