Our Environment

COEN. The Green Alternative.

Composite vs Timber - The True Costs

Composite Wood provides significant environmental, time and cost savings when compared to natural timber products.

We took a Merbau Hardwood 90mm timber product and compared the total cost over 5 years to COEN Composite 140mm boards on a 20 Sqm deck*.

The total cost savings of a COEN Composite deck versus a Merbau deck over 5 years is between $1,400 to $2,000 on a 20sqm area.

*Estimated $50 cost per year for COEN maintenance versus $300 cost per year for Merbau Hardwood. Annual costs considered are time, varnish, brushes/rollers and cleaning agent.

Strength, Durability, Moisture and Temperature

Physical PropertyStandard / ReportNotes
Modulus of Rupture (MoR)AS/NZS 4266.5:2004Ultimate strength at failure
Modulus of Elasticity (MoE)AS/NZS 4266.5:2004Proof elastic limit
Internal Bond StrengthAS/NZS 4266.6:2004Internal bond strength normal to the face of the sample
Specific DensityAS/NZS 4266.4:2004At equilibrium moisture content: (EMC) – 23ºC & 50% RH
Moisture ContentAS/NZS 4266.3:2004At equilibrium moisture content: (EMC) – 23ºC & 50% RH
Moisture AbsorptionAS/NZS 4266.14:2004Moisture absorption mass change is reversible.
Mass change of material at 25ºC & 85% RH / ~216 hrs.
Moisture MovementAS/NZS 4266.14:2004Moisture movement is reversible.
Final length calculated as follows: Lf = Li (1 + Δδ R.H.)
Surface Water AbsorptionAS/NZS 4266.12:2003Observed capillary moisture absorption similar.
Thermal Coefficient of Linear Expansion (α).REF AS 4459.8Thermal linear movement is reversible
Impact ResistanceASTM D4495-12Specimen thickness: 28.0mm Mass of the falling weight: 5Kg
Diameter of the falling weight: 63.5mm
Static Coefficients of frictionASTM D2394-05
(2011) Section 33~37
Specimen: 625*145*28.10mm, Testing Speed: 1.27mm/min
Sliding Coefficients of frictionSpecimen: 625*145*28.10mm, Testing Speed: 51mm/min
Abrasion ResistanceASTM D4060-10Wheel: CS-10, Load: 1000g/wheel (total 2000g), Cycles: 1000
UV Resistant CoatingISO 105-A02 AWTAContinuous cyclic QUV test – 1000 hrs
UV stable under normal environmental conditions Gloss Loss Nil – Colour change 4
Salt Water EmersionCSIRO-CMMTSuitable for marine intertidal zones and salt spray environments
High Humidity EnvironmentCSIRO-CMMTSuitable for high humidity environments
Termite ResistanceCSIRO-FFPSuitable for outside above-ground applications

Fire and Ignitability

Physical PropertyStandard / ReportNotes
Fire Hazard PropertyAS/NZS 3837
Specification A2.4 of BCA
Performance Composition
Average Specific Extinction Area: 231.0 m²/kg,
Specification C1.10 section 4(c) of the BCA.
Early Fire Hazard Indices
· Ignitability Index
· Spread of Flame Index
· Heat Evolved Index
· Smoke Developed Index
AS/NZS 1530.3 CSIROStandard Composition
Self-extinguishing with no support for spread of flame or further combustion.
Suitable for all BCA building classifications – 1, 2, 3, 5, 6, 8 or 9b.