Decking NI – Composite Decking FAQ

1. What is composite decking?

Composite decking is a long‑lasting outdoor board made from a blend of recycled wood fibres and plastics. It offers the look of timber without the ongoing maintenance, making it ideal for gardens, caravans, commercial spaces, and high‑traffic areas.

2. How long does composite decking last?

High‑quality composite decking typically lasts 20–25 years, depending on board type and installation. Decking NI supplies solid, durable boards designed for long‑term performance in Irish weather conditions.

3. Is composite decking slippery when wet?

Composite decking is designed with textured surfaces to improve grip. Our solid woodgrain and grooved boards provide strong slip resistance, even in wet conditions, when installed with correct drainage and fall.

4. Does composite decking fade over time?

Composite boards may experience slight lightening in the first few months as they settle, but they do not fade like timber. Decking NI boards are UV‑stabilised for long‑term colour retention.

5. How much does composite decking cost?

Costs vary depending on board type, colour, and project size. Composite decking is more expensive upfront than timber but significantly cheaper over its lifespan due to minimal maintenance and long durability. Contact us for accurate pricing and trade rates.

6. What maintenance does composite decking require?

Composite decking is low‑maintenance. Cleaning with warm soapy water and a soft brush a few times per year is usually enough. No painting, staining, sealing, or oiling is required.

7. Can composite decking be installed on concrete?

Yes — composite decking can be installed on concrete using a suitable subframe such as treated timber, composite joists, or aluminium. Proper airflow and drainage must be maintained.

8. What subframe should I use for composite decking?

For longevity, we recommend:

• Aluminium subframes for commercial roof gardens
• Composite joists for standard domestic installs
• Treated timber as a cost‑effective option when installed correctly with adequate airflow

        Decking NI supplies multiple subframe options for different site conditions.

9. How far apart should joists be for composite decking?

Most composite decking requires joist spacing of 300mm centres. Heavier‑duty boards or commercial installations may require closer spacing. Always follow the manufacturer’s guidelines.

10. Is composite decking suitable for commercial use?

Yes — composite decking is widely used in restaurants, hotels, caravan parks, schools, and public spaces. Decking NI has supplied decking for airports, embassies, government buildings, and large commercial projects.

11. Can composite decking be used around caravans and lodges?

Absolutely. Composite decking is ideal for caravan sites because it is durable, low‑maintenance, and resistant to moisture. We supply large volumes to caravan parks across Northern Ireland.

12. Does composite decking expand or contract?

Yes — composite boards expand and contract slightly with temperature changes. This is normal and accounted for during installation with correct spacing and fixings.

13. Can composite decking be painted or stained?

No — composite decking is designed to maintain its colour without painting or staining. Applying paint or stain can void warranties and affect performance.

14. Is composite decking environmentally friendly?

Composite decking is made from recycled materials and reduces the need for timber harvesting. It is a sustainable choice for long‑lasting outdoor spaces.

15. Will composite decking warp or crack?

Composite decking does not warp, crack, or splinter like timber when installed correctly. Proper subframe support and ventilation are essential for long‑term stability.

16. Does composite decking get hot in the sun?

Composite decking can become warm in direct sunlight, similar to darker timber. Lighter colours absorb less heat and are recommended for south‑facing or exposed areas.

17. Is composite decking easy to install?

Composite decking installs similarly to timber but requires correct spacing, ventilation, and fixings. Many landscapers and builders choose composite because it is consistent, stable, and quick to work with.

18. Do you supply to trade customers?

Yes — Decking NI supplies landscapers, builders, joiners, architects, and caravan‑site installers across Northern Ireland. Trade customers can collect materials directly from our yard or arrange delivery.

19. Can I collect decking materials the same day?

Yes — most products are available for same‑day collection from our yard in Dungannon when pre‑ordered. We also offer fast delivery across Mid Ulster and beyond.

20. What colours and styles are available?

We stock a wide range of colours, including greys, browns, and natural wood tones. Options include:

• Solid woodgrain boards
• Grooved boards
• Commercial‑grade boards
• Aluminium decking

Samples are available on request.

21. Do you offer installation advice?

Yes — with over 20 years of experience, we provide practical guidance on subframes, levels, steps, ramps, and complex site conditions. Our expertise is available to both homeowners and trade professionals.