Our Products/Co-extrusion WPC decking

Round Hollow Composite Board

  • Water proof

  • Eco-friendly

  • UV-resist

  • Low maintenance

Pattern Selection
  • Matt Texture

  • Wood Vein

  • Saw Mark

  • Smooth Surface

Everything there is to know

√   Co-extruded decking

√   Reversible and removable profile

√   Different surface finish

√   Wood relief grained surface

√   Multi-chromatic colours

√   Stain and fading resistant

Product Benefits

Co-extruded protection layer

Reversible profile: 2 effective sides

  • Material

    Wood fiber+HDPE+Additives

  • Sizes

    23 x 138 mm

  • Fasteners

    Stainless steel clip/ABS plastic clip

  • Extrusion type

    Co-extrusion 360°

  • Slipperiness

    Pendulum value: 46-90

  • Flexural properties

    Bending Strength: 41.0 MPa

  • Water absorption

    Mean: 0.87% Max: 0.9%

  • Fire test

    Class C

Stain resistance and water proof

Co-extrusion decking is an upgraded type of wpc composite decking, which is superior to the first generation WPC decking. Co-extrusion decking has a full 360-degree coating and the water absorption rate of the coating is extremely low, which effectively prevents water from entering the core layer so that the board is not prone to mold. Also the Co-extrusion decking has better stain resistance than normal 1st generation wpc decking, it can be easily cleaned with water and soap while first generation wpc decking requires more maintenance time and cost to keep longer service time.

UV resistance

Co-extruison WPC has very superior color fastness. General plastic wood materials after the installation of 2-3 years or so. There will be a certain fading in the original color, which also makes many owners very headache. Co-extrusion plastic wood has the surface of the color protective layer, the color preservation time extended to about 15 years. 

The board is completely rain-proof, and rain flows off without letting water penetrate the protected composite wood. UV-resistant additives are also added to this thin layer to avoid any fading over time.


Grinwood WPC Material Co., Ltd. warrants to the original purchaser  (“Purchaser”) that, for the period of times set forth in the following sentence, under normal use and service conditions, Grinwood product shall be free from material defects in workmanship and materials, and shall not split, splinter, rot or suffer structural damage from termites. The term of such warranty shall be fifteen (15) years from the date of original purchase for a residential application, and ten (10) years from the date of original purchase for a commercial application.

Grinwood guarantees the resistance of Co-extrusion deck boards to stains and fading, subject to compliance with instructions for installation and use in residential applications.

Grinwood Co-extrusion decking is fully resistant to stains, and its radiance is sustained by a co-extrusion process, which covers the board with a pure polyethylene film to ensure perfect sealing of the coating. Maintenance is easier and is limited to simply rinsing with water.

The high-density polyethylene and wood fibre mixture forming the core of the board also ensures very good resistance to knocks and wear.

Clip installation

Grinwood boards must be installed in accordance with the installation instructions, by using stainless steel clips, T clips, etc.

These clips help hold the stainless-steel screws in place during installation. Considerable time is saved during installation. Moreover, we have different types screws for different materials joist to use.

Joist gaps (centre-to-centre distance) are at most 35cm for boards. If you need the installation guide in details, please contact us through email to get it.


Grinwood Co-extrusion Decking is an environmentally-friendly product. 90% manufactured with raw materials from the recycling industry, decking boards are also entirely recyclable.

High-density polyethylene (HDPE) comes from the recycling of plastic waste (plastic bottles), and the wood fibers come from sawdust from manufacturers such as furniture makers.

Manufacturing Grinwood decking boards does not harm tropical forests and is an attractive alternative to exotic woods.

Technical documents
Drawing display