145×22.5mm Round Hollow Co-extrusion Composite Decking Board – GD-004
- Model: GD-004
- Size: 145 x 22.5 mm
- Weight: 3.15 kg/m
- Profile: Six round hollow chambers, dual colour, wood grain both faces
- Length: 2.2 m / 2.9 m / 3.6 m, custom lengths available
- Colours: 8 standard colors · custom color matching from 200m²
- Certifications: CE / ISO 9001 / SGS / FSC
Product Description
MacroTech GD-004 (145×22.5mm) is a round-hole hollow co-extruded WPC decking board designed for projects that require a balance of structural stability, lightweight properties, and long-term outdoor weather resistance. Measuring 145mm in width and 22.5mm in thickness, the board features a round-hole hollow structure that ensures surface durability while effectively reducing material usage and unit weight. It is suitable for residential terraces, balconies, garden decks, pool surrounds, and commercial outdoor paving projects.
Unlike square-hole hollow decking, MacroTech GD-004 utilizes a round-hole design that offers more balanced structural load distribution. Combining the advantages of reduced weight and enhanced stability, it is an ideal choice for outdoor projects where installation efficiency, transportation costs, and overall cost-effectiveness are priorities.
More About GD-004
- Technical Specifications
- Installation Data
- Ordering
| Property | Value |
| Board dimensions | 145 × 22.5 mm |
| Service temperature | -60 °C to +60 °C |
| Weight | 3.15 kg/m |
| Composition | 60% wood flour + 30% HDPE + 10% additives |
| Slip resistance | R10 (DIN EN 16165), report supplied with quotation |
| Linear thermal expansion | 0.15% (-65 °C to +65 °C) |
| Compliance standard | GB/T 24508-2020, EN 15534 |
| Warranty | 15 years |
Installation Data
| Property | Value |
| Joist spacing | 300 mm centres |
| Board-to-board gap | 6 mm |
| Joist-to-wall clearance | 30 mm |
| Screw pitch on joist | 500 mm |
| Drainage slope | < 1% |
| Fastener | 7.8 mm steel clip / 6 mm plastic clip |
| Property | Value |
| MOQ | 100 m2 |
| Lead time | 15 days |
| Custom colour | from 200 m2 |
| Trade terms | FOB / CIF, Tianjin Port |
| Traceability | Sample tag and production code on every pallet |
Features
Round Hollow Core for Efficient Outdoor Projects
GD-004 uses a round hollow core structure to balance board strength and material efficiency. Compared with solid decking, it helps reduce weight for easier handling, lower transport load and faster installation, while still delivering reliable performance for residential terraces, balconies, garden decks and light commercial outdoor areas.
Co-extruded Surface Built for Outdoor Exposure
The co-extruded cap layer is formed together with the WPC core in one pass, rather than applied as a surface coating. This integrated structure helps reduce edge lifting risk and improves resistance to moisture, fading, staining, cracking and daily outdoor wear, making GD-004 suitable for long-term decking projects.
Made with Wood Fiber and Recycled HDPE
GD-004 is manufactured from 60% wood flour, 30% HDPE and 10% additives, reducing reliance on natural timber while maintaining a wood-like appearance. It provides a low-maintenance composite decking option for distributors, contractors and project buyers seeking a more sustainable outdoor flooring solution.
Application
