While it might seem convenient to use indoor furniture cushions on your outdoor furniture, especially if you remember to bring them inside when it rains, this practice is generally not recommended and can lead to several problems. The fundamental issue lies in the material composition. Indoor cushions are typically made from fabrics like cotton, linen, velvet, and standard polyurethane foam, which are not designed to withstand the outdoor environment.
Even if you diligently bring them inside during rain, they are still exposed to high humidity, morning dew, direct sunlight, and pollen. Sunlight can quickly fade and degrade indoor fabrics, while humidity and moisture are a perfect breeding ground for mold and mildew within the foam filling. This can happen surprisingly fast, leading to unpleasant odors and permanent damage.
Furthermore, indoor cushions lack the protective, weather-resistant treatments found in outdoor-grade cushions. True outdoor cushions are made with solution-dyed acrylic fabrics, quick-dry foam, and are often treated to be mold-resistant and UV-protected. They are engineered to endure the elements and dry quickly, preventing internal damage.
For the longevity of your cushions and the comfort of your outdoor space, it is always best to invest in cushions specifically designed for outdoor use. They require less maintenance and will maintain their appearance and integrity for seasons to come, providing a much more practical and durable solution for your patio, deck, or garden furniture.