Using a pressure washer to clean outdoor furniture can be effective, but it carries a high risk of damage if done incorrectly. The powerful stream of water can strip paint, dent soft woods like pine, force moisture into crevices leading to mold, and shred cushion fabrics. Whether it's safe depends on your furniture material and your technique.
For durable materials like wrought iron, aluminum, or high-quality plastic, a pressure washer can be used with caution. Always start with the widest spray nozzle (40-degree tip) and the lowest pressure setting. Maintain a safe distance of at least 2-3 feet and keep the nozzle moving continuously to avoid concentrating water in one spot. Pre-rinse with a garden hose to remove loose dirt.
However, for more delicate materials, you should avoid pressure washers entirely. This includes:
- Wood furniture (especially softwoods): The high pressure can splinter and roughen the wood surface.
- Wicker and rattan: It can unravel the fibers and destroy the piece.
- Furniture with wood slats or delicate joints: Water can be forced in, causing warping and rot.
A safer alternative for all furniture types is to use a bucket of warm, soapy water with a mild detergent and a soft-bristled brush. This method provides control and prevents the irreversible damage a pressure washer can cause. After any cleaning, allow your furniture to dry completely in the sun before using or applying a new protective sealant. By choosing the right method, you can extend the life and beauty of your outdoor investment.