Whether it is advisable to stack urban outdoor furniture for winter storage depends on several key factors. Primarily, the material of your furniture dictates the best approach. Stacking can be a space-saving solution for durable materials like powder-coated aluminum, certain treated metals, and high-quality, all-weather resins. However, it is generally not recommended for delicate materials like natural wicker, untreated wood, or thin sling fabrics, as pressure and moisture trapped between pieces can cause damage, warping, or mold.
If you choose to stack, proper preparation is essential. First, thoroughly clean each piece to remove dirt, pollen, and organic matter. Allow furniture to dry completely. Applying a protective cover to individual pieces before stacking, or using a large, breathable cover over the entire stack, is highly recommended to shield against moisture, dust, and UV rays. Ensure the stack is stable and placed on a dry, level surface, preferably off bare ground or concrete, using pallets or protective mats to prevent moisture wicking.
The core goal of winter storage is protection from harsh elements—snow, ice, freezing rain, and prolonged dampness. Stacking, when done correctly for suitable materials, can aid in this by reducing the storage footprint and allowing for efficient covering. Ultimately, consulting the manufacturer's care instructions is the most reliable course of action. Proper winter storage, whether stacking is involved or not, significantly extends the lifespan and appearance of your urban outdoor investment.