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Our Exterior Range of Spiral Staircase Kits is ideal for outdoor applications, whether you want easy access to a balcony from your garden, or you are connecting a lower outdoor level to an exterior doorway, whatever your requirements you will find a great range of exterior spiral staircases in this section. Exterior spiral stairs come in two finishes, hot-dipped galvanised such as the Gamia Zinc range, or powder-coated finishes such as the Gamia Exterior range.