Composite decking is a favourite choice for homeowners who want a stylish, durable, and low-maintenance outdoor space. It gives the charm of timber with the strength of modern materials. While it’s built to last, it still needs a bit of care to stay clean and beautiful over time.
Here’s a simple guide to help you maintenance composite decking and keep it in great shape for years.
Why Regular Maintenance Matters
Composite decking doesn’t rot, splinter, or need staining like timber. Still, it faces sunlight, rain, and dust every day. Over time, dirt, pollen, and leaves can settle on the boards. If ignored, they may cause stains, mould, or slippery patches.
1. Clean Your Deck Often
Cleaning is the easiest way to protect your deck. It stops dirt and grime from building up and keeps the surface bright.
You don’t need any special tools. A soft broom, mild detergent, and warm water work well. Scrub the boards gently with a soft brush, then rinse with clean water.
Avoid strong chemicals or bleach since they can dull the finish. If you prefer, use a cleaner made for composite decks. Try to clean every few months, or more often if you live in a dusty or humid area.
2. Keep the Surface Free from Debris
Leaves and twigs often get stuck between boards. When this happens, they trap moisture and encourage mould.
Use a broom or leaf blower to clear them away. Check the gaps between boards to make sure air and water can pass through easily. This simple habit improves drainage and prevents damp spots.
3. Clean Spills Quickly
Outdoor decks often see food and drink spills. If not cleaned quickly, these can leave stains.
Wipe up spills as soon as they occur. Use a soft cloth with warm, soapy water. For oily marks, a small amount of household degreaser can help.
Always test any cleaner on a small, hidden section first. This ensures it won’t affect the deck’s colour.
4. Stop Mould and Algae Early
Composite decking resists mould better than wood, but it can still appear in damp, shaded spots.
To prevent it, clean the deck regularly and let it dry after rain. If you see mould, wash the area with warm water and mild soap. Use a soft brush and rinse well.
Avoid metal brushes or abrasive pads. They can scratch the surface and make it harder to clean in the future.
5. Use Furniture Pads and Safe Mats
Outdoor furniture can leave marks or dents over time. To avoid this, place rubber or felt pads under table and chair legs.
Choose mats that allow air to circulate and avoid those with solid rubber backing, which can trap moisture. If possible, move your furniture now and then. It prevents uneven fading from sun exposure and keeps the deck looking fresh.
6. Inspect for Loose Boards or Screws
Check your deck once in a while. Look for lifted boards, loose screws, or small cracks.
Fixing small issues right away saves you from bigger repairs later. Tighten screws and replace damaged parts as needed. This keeps the deck safe for walking and maintains its structure.
7. Use Pressure Washers Carefully
Pressure washing can remove deep dirt, but too much force can damage the surface.
If you use one, keep the nozzle about 20–30 centimetres away and choose a wide spray setting. Use gentle pressure and rinse evenly.
For most people, a soft brush and garden hose are all that’s needed for regular cleaning.
8. Manage Sunlight Exposure
Direct sunlight can slowly fade any outdoor surface. Composite decking resists this well, but extra care helps.
If your deck gets full sun all day, consider adding a shade structure like a pergola or umbrella. This protects the surface and keeps the area cooler during summer.
9. Check Drainage Around the Deck
Good drainage prevents water from collecting on the surface. Standing water can create slippery areas and may lead to mould.
Make sure the deck has a slight slope to help water run off. Keep gutters and nearby drains clear. Also, check that water isn’t pooling under the deck. Proper drainage keeps both the boards and frame in good shape.
10. Adjust Your Care by Season
Every season brings different challenges. After winter, clean off any dirt or algae. In summer, inspect for fading or loose fittings.
Autumn is the time to clear fallen leaves, while spring is perfect for a full wash before outdoor gatherings. A small effort each season helps your deck stay strong and attractive all year.
The Benefits of Simple Care
Taking care of composite decking doesn’t take much effort. A few minutes every month can make a huge difference.
Regular cleaning prevents stains, keeps colours bright, and protects your investment. It also means fewer repairs and less worry about long-term wear. Most importantly, your deck will always be ready for gatherings, barbecues, or quiet evenings outdoors.
Final Thoughts
Composite decking is built for long life, but even the best materials need attention. With basic cleaning, quick spill removal, and seasonal checks, your deck will stay beautiful and safe for many years.
