Yes, in most cases, you do need to treat the wood on your urban outdoor furniture every year—but the exact frequency depends on the wood species, the climate, and the finish you initially applied.
Outdoor furniture in an urban setting faces unique challenges: pollution, airborne grime, and sometimes limited direct sunlight. Hardwoods like teak, ipe, or cedar are naturally more resistant to moisture and insects, but even they benefit from annual care. Over time, exposure to rain, UV rays, and temperature swings causes wood to dry out, crack, fade, or develop a gray patina. An annual treatment—such as applying a UV-protective sealant, teak oil, or a water-repellent preservative—helps maintain the wood’s structural integrity and appearance.
If your furniture arrived pre-finished with a high-quality exterior-grade stain or paint, you might extend the interval to every two years. However, for oil-treated or untreated wood, yearly maintenance is strongly recommended. In high-rainfall or very sunny urban areas, you may even need to treat the wood twice a year.
Also, consider the microclimate of your urban space. A balcony or rooftop with direct sun will age wood faster than a shaded terrace. Rooftop furniture exposed to reflected heat from nearby buildings may also require more frequent attention. Proper cleaning before treatment is essential: remove mold, dirt, and old finish using a mild wood cleaner and allow the wood to dry fully.
In short: yes, plan on a yearly application of a quality wood treatment product to keep your urban outdoor furniture looking vibrant and lasting longer. Skipping a year is possible but will likely accelerate wear and shorten its lifespan.