The 4Everdeck® Walnut Ultra Composite Decking Board is a dark brown, co-extruded composite deck board with a realistic wood grain finish — closely resembling the look of dark treated hardwood decking, without any of the maintenance. Dual-sided and reversible, it offers two distinct wood grain looks in a single board.
As part of the 4Everdeck® Ultra co-extruded range, this board carries a 20-year guarantee — double that of the standard composite range — thanks to its superior co-extruded construction.
Why Co-Extruded?
Unlike standard composite decking, the 4Everdeck® Ultra range uses a co-extrusion process that wraps the composite core in a solid polymer cap on all four sides. This cap provides superior protection against moisture, UV fading, staining, and surface scratching. The colour is integral to the cap layer, not a surface coating, so it will not peel, flake, or fade over time — which is why the Ultra range carries a 20-year guarantee compared to 10 years on the standard range.
Ideal Applications
- Residential outdoor decks, patios, and pool surrounds
- Commercial decking in hospitality, retail, and entertainment spaces
- Premium installations requiring a dark hardwood aesthetic
- Replacement decking for existing timber deck structures
Key Features
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20-year guarantee — co-extruded Ultra construction
- Co-extruded polymer cap on all four sides — superior moisture, UV, stain, and scratch resistance
- Dual-sided reversible board — two wood grain looks in one board
- Maintenance-free — no staining, sealing, or sanding required
- Eco-friendly — manufactured from recycled HDPE and wood filler
- Excellent non-slip surface
- Concealed hidden clip fastening system — no visible fixings
- Can be machined with standard woodworking tools
- Usually in stock — lead time 1–2 days
Technical Specifications
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Dimensions: 23mm × 138mm × 5800mm per board
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Residential joist spacing: 330mm maximum (centre to centre)
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Commercial joist spacing: 300mm maximum (centre to centre)
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Clips: Sold separately
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Material: Co-extruded Wood Plastic Composite (recycled HDPE + wood filler)
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Colour: Walnut — dark brown wood grain
Frequently Asked Questions
What is the difference between co-extruded Ultra and standard composite decking?
Standard composite decking is a single-layer board. Co-extruded composite wraps the core in a solid polymer cap on all four sides, providing significantly better resistance to moisture, UV fading, staining, and scratching. This is why the Ultra range carries a 20-year guarantee versus 10 years on the standard range.
What does dual-sided mean?
The board has a different wood grain finish on each face. You choose which side faces up when installing, giving you two distinct looks from a single board.
What joist spacing is required?
For residential applications, joists should be spaced no more than 330mm apart (centre to centre). For commercial applications, maximum joist spacing is 300mm centre to centre.
Are clips included?
No — clips and fasteners are sold separately.
Is this decking suitable for pool surrounds?
Yes. The co-extruded composite construction is moisture-resistant, splinter-free, and UV-stabilised, making it well suited to pool surrounds and wet outdoor areas.
What maintenance is required?
None. The co-extruded composite retains its colour and finish without painting, staining, or sealing. An occasional wash with water and a brush is all that is needed.
What is the lead time?
Standard lead time is 1–2 days. This product is usually in stock and available for prompt dispatch.
For technical data and installation guides, visit www.4everdeck.co.za. For bulk or trade pricing, contact us directly.
