Why does the surface of the decking become “fuzzy”?

This is not a defect but a completely natural process known as fiber fuzzing.

When freshly sawn timber is exposed to outdoor conditions, it will usually begin to turn gray within one to two years. This is because the sun’s UV rays gradually break down the lignin in the wood’s surface layer. A natural phenomenon that can affect all types of wood is so-called fiber fuzzing, or fiber looseness, which is part of the wood’s natural aging process.

Fiber fuzzing occurs when the outermost layer of lignin, which acts as a binder between the wood fibers, is broken down by the sun’s rays. Lignin holds the fibers together, but when it is damaged by UV radiation, particularly in areas with strong sunlight, fiber fuzzing can occur. If the wood is also damp for an extended period, the surface fibers can loosen and become visible, often during the spring months. These loose fibers create a fuzzy appearance, but the wood underneath remains intact.

Fiber fuzzing does not affect the timber’s durability or protection against rot and decreases over time. If fiber fuzzing occurs on untreated decking or exterior cladding, you can easily remove it with a soft brush. Brush it while dry and, preferably, scrub it with soap once afterward.

____________________________________________________________________________________________

Questions and answers

1. Why has my decking suddenly become fuzzy?
Answer: It is a natural process known as fiber fuzzing.

2. Is the soap what made the decking fuzzy?
Answer: No.

3. Can fiber fuzzing be avoided?
Answer: It is completely natural and difficult to avoid if you want genuine wood.

Order natural cleaning products here: Västerbottenssåpa