
Wooden Pergola Maintenance
Despite being strong and made-to-last, all timber changes slightly as it ages. This could be through a change in colour or through timber movement. Many timbers, especially oak, age beautifully - but perhaps you would rather your timber looks the same as the day you bought it. That's where the maintenance comes in. By following these easy steps, your pergola will be unchangingly stunning throughout its lifetime.
- Clean your pergola. This will help prevent mould growth and rot. Scrub the surface with a mixture of warm water and mild detergent. Avoid using abrasive tools or harsh chemicals, as these can damage the finish.
- Allow your pergola to dry fully before the next step.
- Use your Osmo UV Protection Oil and apply it evenly across the pergola, ensuring full coverage. This pergola treatment has a natural, clear finish that doesn’t crack, peel or blister.
- Leave it to dry.
How often should you re-treat a pergola?
By repeating these steps two times a year (each six months), your pergola will be excellently maintained. Doing so in Spring and early Autumn are peak time frames, due to the milder weather, giving the wood time to dry properly.

Do You Need to Treat a Pergola?
Being exposed to the outdoor elements and weather conditions, pergola treatment is important to ensure that your pergola remains strong and looking as good as the day you bought it. Whether it's addressing issues such as rot, helping to prevent a mildew build up or simply to retain its original colour, pergola maintenance is a worthy step to take. Don't worry - this won't need to be done frequently. Once or twice a year would be plenty to help your pergola reach its maximum lifetime.
Some timbers, such as softwood mixtures of larch and spruce, are recommended to have this treatment to enhance their durability. Stronger timbers such as oak and cedar will need less attention - so you can rest easy, knowing they'll battle through any condition!
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