composite / Timber-Plastic Composite / Decking & Cladding
Wood-Plastic Composite (WPC) Decking, Cladding & Screening (19mm, 20mm, 25mm decking; 8mm-20mm cladding)
Extruded wood-plastic composite boards for decking and cladding; properties vary by formulation and profile.
Atlas code
COM-TPC-DEC-001
At-a-glance signals
Extruded wood-plastic composite boards for decking and cladding; properties vary by formulation and profile.
Overview
Executive summary
Wood-plastic composite (WPC) decking and cladding combine wood flour with thermoplastic polymers and additives to create low-maintenance exterior boards. Products are extruded into solid or hollow profiles for decking, screening, and cladding.
Best when…
- Zero maintenance required - no sealing, staining or painting
- 25-30 year warranty period
- Excellent termite resistance (CSIRO 9.6-10/10 rating)
- Won't rot, crack, splinter or warp
- UV stable with minimal fading
- Slip resistant surface (R11/P5 wet rating)
- 90-95% recycled content
- 100% recyclable at end of life
- Suitable for all Australian climate zones
- BAL-40 bushfire rating available
Top advantages
- 01 Zero maintenance required - no sealing, staining or painting
- 02 25-30 year warranty period
- 03 Excellent termite resistance (CSIRO 9.6-10/10 rating)
- 04 Won't rot, crack, splinter or warp
- 05 UV stable with minimal fading
Top limitations
- 01 Higher initial cost than treated timber ($84-299/m²)
- 02 Thermal expansion requires careful installation (3-4mm/3m)
- 03 Some colour fading over time (stabilises after 12 months)
- 04 Requires specific hidden clip systems for best results
- 05 Limited structural capacity - decorative use only
Technical
Physical ·9
- Density
- 1280 kg/m3 Ekodeck shiplap cladding technical specifications list density 1.28 g/cm3.
- Specific gravity
- 1.15
- Porosity
- 2 %
- Water absorption
- 0.51 % Ekodeck Classic decking technical specifications (ASTM D570, 24h).
- Hardness
- 95
- UV resistance
- excellent // UV stabilised formulation
- Chemical resistance
- good // pH 4-10 resistance
- pH tolerance
- 4-10
- Surface roughness
- 25 µm
Mechanical ·5
- Tensile strength
- 19 MPa
- Compressive strength
- 11 MPa
- Flexural strength
- 25.41-52.32 MPa USDA FPL wood handbook Table 12-1 for wood-plastic composites.
- Impact resistance
- moderate // General assessment
- Creep resistance
- moderate // Temperature dependent
Sustainability & Health
Embodied carbon & energy ·6
- Embodied carbon
- 1
- Carbon footprint
- 1
- Embodied energy
- 15 MJ/kg
- Recycled content
- 92.5 %
- Renewable content
- 50 %
- Circular score
- 85
Compliance & Fire
Fire performance ·5
- Combustibility class
- combustible // Standard WPC
- Ignition temp
- 350 °C
- Flame spread index
- 3
- Smoke dev. index
- 4.5
- Heat release rate
- 2.5
Cost & Lifecycle
Capex & lead time ·6
- Material cost (range)
- 84, 112
- Material cost (per unit)
- 98
- Lead time
- 3
- Lifecycle cost
- 150
- Annual maintenance
- 5
- Market availability
- excellent // Widely available
Service life & durability ·3
- Expected lifespan
- 27.5
- Maintenance interval
- 12
- Warranty period
- 25
Layer D
Where it's used
Residential and commercial decking
External wall cladding systems
Privacy screening and fencing
Marine boardwalks and jetties
Pool surrounds and wet areas
School playgrounds and public spaces
Balcony and terrace flooring
Soffit and fascia applications
Architectural feature elements