Dirty decking? Read these tips...
How to Clean and Care for Your Composite Decking
Composite decking is one of the easiest ways to get a beautiful, low-maintenance outdoor space — but “low-maintenance” doesn’t mean no maintenance. A little care now and then keeps your deck looking great for years. Here’s a simple, practical guide to cleaning and looking after your composite decking without breaking a sweat.
1. Sweep Regularly
The easiest way to keep your deck looking nice is… a broom.
Sweep away leaves, dirt, and debris regularly.
Removing debris prevents stains, mould, and mildew from building up.
Tip: A quick sweep once a week during the fall is usually enough to stay on top of it.
2. Wash With Soap and Water
Composite decking isn’t like timber — it doesn’t need sanding or staining. A simple wash will do the trick:
Mix warm water with a mild soap or detergent.
Use a soft brush or mop to scrub the surface.
Rinse thoroughly with clean water.
This works well for general dirt, dust, or pollen that naturally collects on your deck.
3. Tackle Stubborn Stains
Accidents happen — drinks spill, barbecue sauces splash, kids’ toys leave marks. Don’t panic. Most stains can be removed with a little extra care:
Food and drink stains: Warm, soapy water + a soft brush usually works.
Oil or grease: Dish soap or a degreasing cleaner can lift the marks.
Mould and mildew: Mix one part vinegar with three parts water, scrub gently, then rinse.
Pro tip: Always test cleaners on a small, hidden area first to make sure they don’t affect the colour.
4. Avoid Harsh Tools or Chemicals
Your composite deck is tough, but it can still be scratched or discoloured by the wrong products:
Avoid steel wool, wire brushes, or abrasive scrubbers.
Stay away from bleach or harsh chemical cleaners (they can damage the finish).
Pressure washers are okay in moderation, but use a low-pressure setting and keep the nozzle moving — too much pressure can damage the boards.
5. Keep Plants and Furniture in Check
Don’t let flower pots sit on your deck for weeks without moving them — trapped moisture can cause discoloration.
Use protective pads under furniture legs to prevent scratching.
Avoid dragging heavy items across the boards.
6. Seasonal Tips
Spring/Summer: Quick rinse and sweep after pollen season or heavy storms.
Autumn: Sweep leaves regularly — they hold moisture and can stain.
Winter: Remove snow carefully with a plastic shovel; avoid metal shovels that can scratch the surface.
7. Enjoy Your Deck!
The beauty of composite decking is that with just a little attention, it keeps looking new for years. By sweeping, washing, and keeping an eye on stains, you’re investing a small amount of effort for a deck that stays beautiful and functional.
Quick Cleaning Checklist:
Sweep weekly
Wash monthly or as needed
Spot-clean stains promptly
Protect furniture and pots
Rinse off pollen and debris seasonally
A few minutes here and there keeps your deck looking great — no sanding, staining, or costly maintenance required.
