Maintaining the beauty and longevity of your wood urban outdoor furniture requires regular treatment and sealing. The frequency depends on several key factors: the type of wood, your local climate, and the specific sealant product used.
Generally, most wood furniture benefits from resealing every 1 to 3 years. Dense, oily hardwoods like teak or ipe may require less frequent treatment, perhaps every 2-3 years, or even longer if left to weather naturally. Softer woods like pine, however, often need annual sealing to protect against moisture, sun damage, and urban pollutants.
Your local climate is a major factor. Furniture in areas with harsh sun, heavy rain, or significant seasonal changes will need more attentive care. A humid, rainy environment can break down protective finishes faster, while intense UV radiation can cause fading and drying, necessitating more frequent applications.
The type of sealant also dictates the schedule. Film-forming finishes like polyurethane or varnish may need recoating once a year as they can crack and peel. Penetrating oils (e.g., tung oil, linseed oil) typically require reapplication every 1-2 years, as they soak into the wood and wear away more evenly.
The best way to know if it's time for a new treatment is to perform a simple water test. Sprinkle a few drops of water on the wood surface. If it beads up, the sealant is still effective. If the water soaks into the wood, leaving a dark spot, it's time to clean and reseal your furniture.
A good maintenance routine is to give your furniture a thorough cleaning and inspection each spring. This allows you to assess its condition and apply a fresh coat of sealant before the harsh weather of summer or winter arrives, ensuring your furniture remains protected and beautiful for years to come.