Workshop Wednesday: Why Teak Turns Grey — And When You Should (or Shouldn’t) Stop It

One of the most common questions we hear is: Why is my teak turning grey?

The answer is simple — and reassuring.

Teak naturally contains oils and dense fibers that make it extremely durable. When exposed to sunlight, specifically ultraviolet (UV) radiation, the surface fibers begin to oxidize. This oxidation process gradually changes the color from warm golden brown to a soft silver-grey patina.

Importantly, this is a surface-level chemical reaction, not structural deterioration. The strength and integrity of the wood remain intact. In fact, teak has been used for centuries in marine applications because of its resilience in harsh environments.

So the real question becomes: should you prevent it?

If you enjoy the silvery, coastal look, there is no technical reason to intervene. The greying process does not weaken the wood. Periodic cleaning with mild soap and water is sufficient to remove surface dirt and mildew.

If you prefer to maintain the original golden tone, you’ll need UV protection. Teak oils alone do not prevent greying — despite common belief. Oils enhance color temporarily but offer minimal UV resistance. To preserve the original appearance, use a teak protector specifically formulated with UV inhibitors. These products slow oxidation without creating a heavy surface film.

A word of caution: avoid high-gloss sealers or polyurethane on outdoor teak. Film-forming finishes can crack and peel under exterior exposure, creating more maintenance than they solve.

Grey is natural. Golden requires intervention. The choice is aesthetic — not structural.