While it might be tempting to use your comfortable indoor furniture cushions on outdoor furniture frames, this is generally not recommended and can lead to several problems. Indoor cushions are typically made from materials not designed to withstand outdoor conditions. They lack the weather-resistant properties necessary for outdoor use.
The primary issue lies in the fabric and filling materials. Indoor cushions often use natural fibers like cotton or down filling that absorb moisture quickly. When exposed to rain, dew, or humidity, these materials can become saturated, leading to mold and mildew growth. This not only creates unpleasant odors but can also damage the cushion beyond repair.
Furthermore, indoor cushions aren't treated with UV protectants. Sun exposure can cause colors to fade rapidly and weaken fabric fibers, leading to premature tearing. The filling materials may also break down faster when exposed to direct sunlight and temperature fluctuations.
Outdoor furniture cushions are specifically engineered with solution-dyed acrylics, polyester, or vinyl fabrics that resist water, fading, and mildew. Their fillings are typically made from quick-drying foam or fiber that won't retain moisture. Additionally, outdoor cushions often feature drainage grommets and antimicrobial treatments.
For the longevity of your cushions and the comfort of your outdoor space, invest in purpose-built outdoor cushions. They may cost more initially, but will last significantly longer and maintain their appearance through various weather conditions. If you must use indoor cushions temporarily, always bring them inside immediately after use and never leave them exposed to moisture.