Marnar Bruk

How to clean and maintain your royal impregnated terrace

The patio is a key outdoor area in many homes, and with regular maintenance you can both extend its lifespan and maintain a beautiful appearance. Royal impregnated decking from Marnar Bruk is designed to withstand harsh Norwegian weather conditions, but also requires regular care to stay functional and beautiful year after year.
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Why choose royal impregnated decking?

Marnar Bruk decking combines copper-based pressure impregnation with royal oil - an effective protection that is soaked into the entire wood. This provides:

  • Increased dimensional stability
  • Less cracking
  • Reduced absorption of moisture
  • Long lifespan - up to five times longer than untreated timber
  • Lower maintenance costs
  • 30-year rot guarantee for decking

Read more in spring FDV documentation for decking (PDF).

Deck washing - a simple but important routine

When should you wash your patio?

The patio should be washed at least once a year - preferably in the spring - to remove dirt, surface mould and loose pigments.

How do I wash a royal-impregnated terrace?

  • Use a garden hose with light pressure - avoid high-pressure washers as they can damage the surface.
  • Avoid harsh chemicals - water is often enough.
  • Use an antifungal agent if you see signs of surface mould or black mould.
  • Scrub gently with a stiff-bristled brush (not a wire brush) if necessary.

When and how should the terrace be oiled?

In the first few years, there is no need for new oil for technical reasons, but cosmetic maintenance may be desirable to maintain colour and shine.

  • Do you want to freshen up your colour? Apply new royal oil from Marnar Bruk with or without pigment.
  • Reapply after approx. 10 years to renew the oil seal, regardless of colour.
  • Use a brush, roller or sprayer - avoid overflow and ensure even application.
  • Always wash before oiling.

Tips for choosing a deck colour

  • RO.0 Weather grey - requires the least maintenance and greens naturally
  • RB.10 Tar brown and RG.40 Storm grey - needs cosmetic maintenance more often
  • Colour variations, resin rashes and straw marks are natural and not subject to complaint

Terrace maintenance - an annual checklist

  • Inspect the decking for cracks, damage and wear.
  • Finish all cut surfaces with royal oil.
  • Only use fasteners in stainless steel (A2) or acid-proof (A4).
  • Avoid screwing in too deeply - this can create pockets that cause run-off streaks.

Maintenance adds value - year after year! A simple maintenance regime once a year can save you a lot of money later on and give you a deck that both lasts and looks great. If you follow our recommendations and use the right maintenance product, your royal-impregnated decking from Marnar Bruk will be a robust and aesthetically pleasing outdoor environment for decades to come.