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Wood Plastic Composites: Recycled, Lumber of the Future

Consider these facts:

Plastic takes up to 5000 years to degrade in landfill.
Trees need at least 10 years to reach full growth.
Thanks to Wood Plastic Composite, Industrial logging can be minimised and plastic waste management can be improved.

What are WPCs?

Wood plastic composites are processed lumber or timber made out of recycled plastic and wood wastes. It is a non-pollution material that replaces the application of real wood.

Wood Plastic Composites (WPC) are a group of materials that have been developed and refined over the past 12 years that are now generating high levels of global interest. Over recent years the market has exploded with demand for a new generation of high performance products, with the added benefit that they are manufactured predominantly from post consumer recycled HDPE plastic and timber.

Cosset's EVERTUFF™ and DuraComp™ WPC products represent the new generation, having good mechanical properties, high dimensional stability and can be used to produce complex shapes. They are tough, stable and can be extruded to high dimensional tolerances.


What Are The Practical Uses Of WPCs?

Wood Plastic Composites are extremely versatile and can be used in many applications such as commercial, agricultural, mining, civil, portable housing, marine and residential.

Check out our WPC projects

What are the benefits of Wood Plastic Composites?

WPCs can produce the final shape through extrusion processing. This maximizes resource efficiency and gives design flexibility for improved fastening, stiffening, reinforcement, finishing and joining. Wood Plastic Composites are like wood products - but they need no further processing. WPCs are weather, water and mould resistant for outdoor applications where untreated or chemically treated timber products are unsuitable. WPCs are plastic products with exceptional environmental credential and performance.

  • They are true hybrid materials and combine the best properties of both wood and plastic products
  • They use low cost and plentiful raw materials - wood waste and recycled plastics become assets instead of liabilities
  • They are competitively priced and are competitive with traditional materials
  • They are easily fabricated using traditional wood processing techniques
  • They are available in a broad range of finishes and appearance


What are the properties of Wood Plastic Composites?

WPCs are true composite materials and have properties of both materials. They have stiffness and strength between those for plastic or wood, but the density is generally higher than either. The properties of Wood Plastic Composites come directly from their structure: they are intimate mixes of wood particles and plastic. The plastic effectively coats / encases the wood particle as a thin layer. The high moisture resistance of WPCs (water absorption of 0.7% compared to 17.2% for pine) is a direct result of this structure. Water can only be absorbed into the exposed sections of wood and is not transmitted across the plastic boundaries. The result is that WPCs are extremely water resistant, have little thickness swell in water and do not suffer from fungal or insect attack. WPCs have:

  • Good stiffness and impact resistance
  • Dimensional stability
  • Resistance to rot
  • Excellent thermal properties
  • Very low moisture absorption


Wood Plastic Composites and the Environment

One of the main reasons for using WPCs is environmental. The environmental pressures on industry in terms of recycling and sustainability are growing daily. There is a clear need to extend the life of traditional building materials such as wood. This resource efficient uses materials that are currently seen as waste and supports the urgent concept of sustainable development. For users of plastic products there is a need to reduce the dependence on petrochemicals with their rising and cyclical raw material costs. For users of wood products there is a need to improve the recourse efficiency and to recycle the raw materials waste that inevitably occurs. Wood Plastic Composites increase the efficiency of wood usage by up to 40% compared to traditional wood processing.

Further environmental benefits of WPCs include:

  • There is negligible waste and any that is produced is reused
  • WPCs contain no toxins or volatile organic compounds
  • WPCs are recyclable and can be reground and reused after their service life
  • WPCs are considered non-hazardous waste and can be disposed of by standard methods
  • The basic material structure of WPC means that leaching from WPCs is non-existent


Cosset Wood Plastic Composite Test Data Summary Sheets Available

  • Tensile Strength
  • Coefficient of Thermal Expansion
  • Water Absorption
  • EverDeck™ Flexural Strength
  • EverDeck™ Slip
  • EverDeck™ Commercial Flexural Strength
  • EverDeck™ Commercial Slip
  • Chemical Resistance
  • Compressive Strength
  • CRF Flame
  • Fatigue
  • Flexural Strength
  • Immersion Flexural Strength
  • Heat & Humidity Ageing
  • Screw Pull Out

Complete test details are available by request. Specifications or results are likely to change due to continual improvement. All tests are performed by NATA accredited laboratories.


Working with EVERTUFF™ & DuraComp™ recycled WPC's

Cosset’s Recycled Wood Plastic Composites are made up mostly of recycled plastic and recycled timber. Given its timber content, EVERTUFF™ & DuraComp™ can be cut, drilled, planed and routed with the same bits, blades and routing tools as timber. When cutting with a circular saw, try to use a blade with as few teeth per inch as possible. A hand saw can also be used. Cosset recommends that when using power tools always wear eye and hearing protection and ensure that all tools are sharp at time of use.


WPC Fixings for EVERTUFF™ & DuraComp™

When fixing Cosset’s Wood Plastic Composite products to timber or another WPC section, Cosset recommends to use only the Simpson Strongtie® Composi-Lok™ screw. These are a screw designed to be used only with WPCs and when used ensure that the best fix is achieved. Composi-Lok™ screws also can be installed using the Simpson Strongtie® QuikDrive® installation tool to save time and money. All Composi-Lok™ screws are available through Cosset and its national dealer network. For further information on the Composi-Lok™ fixings contact Cosset National Customer Service on 1800 COSSET (1800 267 738) or visit


Non Slip Coatings for EVERTUFF™ & DuraComp™

Although the surface of Cosset’s Wood Plastic Composites are suitable for almost any application as it is, in some cases, be it on mining sites or steep inclines or declines, some organisations require, or just prefer, a more rigid surface. Occupational Health & Safety is top of mind around Australia for all Companies and the importance of non-slip surfaces around work sites is paramount. Cosset offers its customers the option of having a non-slip coating applied to any of our WPC profiles. This coating is available in a number of different non-slip grades and colours and is applied as soon as the product is manufactured.