Guide
How to look after decking through an Irish winter
Updated
The short answer
To protect decking through an Irish winter, clean it back to bare timber in late summer or early autumn, let it dry fully, apply a decking oil or stain, keep leaves and debris swept off over the winter, and treat any green build-up before it gets slippy. Clean and re-oil once a year.
Why decking struggles here
Timber decking needs to dry out between soakings, and in much of Ireland, particularly the west, it rarely gets the chance through the autumn and winter. Wet timber grows algae, which turns it green and slippy, and repeated wetting and drying breaks down the surface so it greys and splinters.
Before the winter
Late summer or early autumn, in a dry spell, is the time to:
- Clean the deck back to sound timber, working along the grain at a pressure that won't tear the surface
- Check for loose or rotten boards and replace them
- Let the timber dry fully, which can take a few dry days
- Apply a good decking oil or stain to protect the wood through the wet months
Through the winter
Sweep leaves off regularly, because wet leaf litter holds moisture against the boards and stains them. Keep the gaps between boards clear so water drains away. If a green film starts to appear, treat it early before it becomes a slip hazard.
Composite decking
Composite decking doesn't need oiling, but it still collects algae, dirt and leaf stains in Irish weather. It needs a gentler clean than timber, with lower pressure and the right cleaner for the material.
Questions
How often should decking be oiled in Ireland?
Once a year for most decks, after a thorough clean. Decks in full sun or heavy use may need it more often.
Will power washing ruin my decking?
Too much pressure held too close will, leaving it fluffy and scarred. The right pressure, working along the grain, cleans it without damage.