MATERIAL DATA SHEET

Wood-Plastic Composite (WPC) Decking, Cladding & Screening (19mm, 20mm, 25mm decking; 8mm-20mm cladding)

Decking & Cladding
composite › Timber-Plastic Composite › Decking & Cladding
compositetimber-plastic compositewpcrecycled-contentlow-maintenancedeckingcladdingbushfire-resistanttermite-resistantuv-stable
ATLAS CODE
COM-TPC-DEC-001
Wood-Plastic Composite (WPC) Decking, Cladding & Screening (19mm, 20mm, 25mm decking; 8mm-20mm cladding)
Category composite
Material Family Timber-Plastic Composite
Regulatory Status combustible
Density
1280 kg/m3
Carbon (A1-A5)
1 kgCO₂e
Fire Class
combustible
Lifespan
27.5 yrs
Description

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.

Primary Sectors
[Residential][Commercial][Education]
Typical Uses
  • 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
Recycled Content 92.5
Renewable Content 50
Recyclability 100
Embodied Carbon 1 kgCO₂e
Embodied Energy 15 MJ/kg
EPD Available Yes
Advantages
Zero maintenance required - no sealing, staining or painting25-30 year warranty periodExcellent termite resistance (CSIRO 9.6-10/10 rating)Won't rot, crack, splinter or warpUV stable with minimal fadingSlip resistant surface (R11/P5 wet rating)90-95% recycled content100% recyclable at end of lifeSuitable for all Australian climate zonesBAL-40 bushfire rating available
Cautions
Higher initial cost than treated timber ($84-299/m²)Thermal expansion requires careful installation (3-4mm/3m)Some colour fading over time (stabilises after 12 months)Requires specific hidden clip systems for best resultsLimited structural capacity - decorative use onlyCan retain heat in direct sunlightPerformance Solution required for NCC compliance
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TECHNICAL DATA: PERFORMANCE PROPERTIES COM-TPC-DEC-001
Density (Dry) 1280 kg/m3
Specific Gravity 1.15
Porosity 2 %
Water Absorption 0.51 %
Hardness 95
Surface Roughness 25 μm
UV Resistance excellent
Chemical Resistance good
pH Tolerance 4-10
Compressive Strength 11 MPa
Tensile Strength 19 MPa
Flexural Strength 25.41-52.32 MPa
Elastic Modulus 1530-4230 MPa
Impact Resistance moderate J/m
Creep Resistance moderate
Abrasion Resistance high
Thermal Conductivity 0.2 W/mK
Thermal Resistance 0.1 m²K/W
Specific Heat Capacity 1600 J/kgK
Thermal Expansion 35 μm/m·K
Melting Point 165 °C
Ignition Temperature 350 °C
Sound Transmission Class (STC) 43
Optical
Light Transmittance 0 %
Light Reflectance (LRV) 20 %

WPC technology emerged in the 1990s as a solution to timber scarcity and waste management. Australian manufacturing commenced in early 2000s with ModWood establishing Melbourne production facilities. The material has evolved from basic profiles to sophisticated co-extruded systems with enhanced UV resistance and fire performance. Current generation products achieve BAL-40 ratings and 30-year warranties, positioning WPC as a premium alternative to traditional timber in Australian construction.

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SAFETY, ECOLOGY & INSTALLATION COM-TPC-DEC-001
Flame Spread Index 3
Smoke Developed Index 4.5
Combustibility Class combustible
Ignition Temperature 350 °C
Heat Release Rate 2.5 kW/m²
Toxicity of Combustion low
Embodied Carbon (A1-A3) 1 kgCO₂e/kg
Embodied Energy 15 MJ/kg
EPD Available Yes
Recycled Content 92.5%
Renewable Content 50%
LEED Points 4
Circular Economy Score 85 /100
VOC Emissions 0 g/L
Skill Level intermediate
Crew Size 2
Installation Time 20 hr/m²
Curing Time 0 hours
Setting Time 0 min
Required Tools
Circular saw with dust extractionDrill with pilot bitsSpirit levelString lineTape measureSafety equipment (PPE)
Certifications Required
Manufacturer training recommended
Weather Limitations
Avoid installation below 5°CAllow for thermal expansion in hot weather
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COMMERCIAL, LOGISTICS & REGULATORY COM-TPC-DEC-001
Annual Maintenance 5
Lifecycle Cost (50yr) 150
Market Availability excellent
Lead Time 3 weeks
Design Life 27.5 years
Warranty Period 25 years
Maintenance Interval 12 months
Freeze/Thaw Resistance excellent
Dimensional Stability good
Certifications Held
CodeMark (Ekodeck products)FSC availableGlobal GreenTag Level CNo formaldehyde emissions
Fire Code Compliance
AS 1530.3AS 1530.8.1 (BAL ratings)
Standards Compliance
NCC Performance Solution A2G2ASTM D790aASTM D6109ASTM D792-08ISO 14001 (manufacturing)EN 15534 (WPC standards)

DISCLAIMER: This specification document is generated from the CLAD Materials Atlas Database. Information is for general guidance only and does not constitute professional engineering advice. Values are typical and may vary by batch, manufacturer, and production run. Verify suitability for specific project applications independently.

ID: COM-TPC-DEC-001 Schema: v3.0
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