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Blog · 21. 9. 2026

Why WPC does not need varnishing: The facts that matter

Terrace half with a varnished wooden board and half with a Grey WPC board, a tin of varnish and a paintbrush

A wooden terrace or fence needs a new coat of varnish or oil every few years. This is not the case with WPC – and here is why.

1. Wood is a natural material that ages

  • Wood naturally expands and contracts with changes in humidity.

  • Under the influence of UV radiation and rain, it loses colour, cracks and turns grey.

  • To maintain its appearance and service life, it requires regular protection – varnishing, oiling or impregnation.

  • Without care, stains, mould and splinters quickly appear.


2. WPC is a blend of wood and polymer

  • WPC boards are manufactured from 60% wood flour and 40% polymer (plastic binder).

  • Thanks to the polymer, they are resistant to moisture, mould and rot – factors that require additional varnish protection on wood.

  • The surface of WPC is designed to be colour-fast and resistant to weather conditions without requiring any coating.


3. Without splinters or cracks

  • Wood dries out and cracks over time, leading to splinters.

  • WPC is a homogeneous material that does not suffer from these problems – its surface is smooth and safe even when walking barefoot.


4. Saving time and money

  • With wood, you need to invest in coatings and oils every 1–2 years, which involves time-consuming and costly maintenance.

  • WPC simply needs to be washed with water or an outdoor cleaner – no sanding, varnishing or oiling.


5. Long-term appearance without the worry

  • Modern WPC boards, especially co-extruded ones, feature a surface protected by a special layer against UV radiation and stains.

  • As a result, they retain their appearance for decades without needing varnish.


Conclusion

The difference is simple:

  • Wood needs varnish because it must be protected from moisture, UV radiation and pests.

  • WPC does not need this protection because its composition naturally resists these factors.

👉 That is why WPC is the ideal choice for anyone looking for a worry-free terrace or fence with a long service life.

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