140*23mm High Rigid Traditional Composite WPC Decking Weatherproof
This professional-grade weatherproof, high rigid traditional composite WPC decking is engineered for extreme temperature fluctuations and high-stress structural environments. By optimizing the rigid ratio of crystalline polymers and refined wood fibers, it achieves an incredibly low coefficient of thermal expansion, preventing brittle cracking in arctic cold or tropical heat while delivering upgraded flexural modulus. This solution directly addresses concerns over thermal deformation and sagging, providing a highly stable engineering flooring system.
- Extreme All-Weather Weatherproof Integrity: Engineered to survive hostile natural environments, our traditional WPC decking maintains structural integrity from -40°C freezing temperatures to scorching desert heat without becoming brittle or degrading.
- High Rigid Structural Flexural Modulus: Featuring a dense, reinforced composite core formulation, these boards resist gravitational creep, structural warping, and "wavy deformation" common in low-grade plastics, maintaining a perfectly flat walking surface.
- Uniform Thermal Stability Design: With completely uniform polymer-to-wood ratio from surface to core, the material expands and contracts at a predictable, balanced rate, preventing internal structural shearing or delamination.
| NO. | Test Items | Requirements | Results | Test Methods |
|---|---|---|---|---|
| 1 | Surface abrasion resistance,g/100r | ≤0.15,and the paint film is not worn through | 0.100 | ✔pass |
| 2 | Colour fastness to light, class | Gray Card≥4 | 4 | ✔pass |
| 3 | Formaldehyde emission,mg/m³ | ≤0.05 | Not detected | ✔pass |
| 4 | Minimum concentrated load, N | ≥3400 | 3562 | ✔pass |
| 5 | Static bending strength,MPa | ≥26.0 | 27.2 | ✔pass |
| 6 | Elastic modulus, MPa | ≥3000 | 4502 | ✔pass |
| 7 | Water absorption, % | ≤1.0 | 0.9 | ✔pass |
| 8 | Falling hammer impact at low temperature | No crackat thetemperature of -10°C | pass | ✔pass |
| 9 | Anti-slippery value | ≥35 | 37 | ✔pass |
Install your joists (wood or aluminum) on a level, draining foundation. Joist spacing must be a maximum of 350mm center-to-center to prevent the deck from sagging.
Screw Starter Clips into the edge of each joist. Slide the groove of your first WPC board firmly into these clips to lock the outer perimeter without surface screws.
Slide Hidden Fastening Clips into the inner groove of the board at every joist intersection and screw them down. These clips automatically create the mandatory 5mm side-to-side expansion gap. Slide the next board into place and repeat.
Where two board ends meet:
- Must use Double Joists: Each board end must rest on its own independent joist and clip.
- Leave an Expansion Gap: Leave a 5mm to 8mm end-to-end gap so the boards can expand in summer without buckling.
- Wall Clearance: Always leave a 10mm gap between the decking and any brick wall or solid structure.
- Finishing: Cover exposed hollow edges by screwing on a WPC Fascia Trim around the perimeter.
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