What are the disadvantages of using cast iron for outdoor benches in rainy climates?

Cast iron is a popular material for outdoor furniture due to its durability and classic aesthetic. However, in rainy climates, it presents several disadvantages. The primary issue is rust. Cast iron is prone to rust when exposed to moisture over time, leading to deterioration and an unattractive appearance. Even with protective coatings, constant rain can wear them down, requiring frequent maintenance like repainting or resealing. Additionally, cast iron benches are heavy, making them difficult to move or rearrange. In wet conditions, the surface can become slippery and uncomfortable to sit on. To mitigate these issues, regular cleaning, rust-proof treatments, and covers are recommended, but these add to the long-term upkeep costs. For rainy areas, alternative materials like aluminum or teak may be more practical choices.