COEN Genesis Terra Tough
COENCompositeSolid core
8 colours: pick one to see it
- Board size
- 140 × 25 mm5.4 m lengths
- Cap
- Capped all roundA tougher outer shell that resists stains and fading
- Core
- Solid
- Fixing
- Hidden clips or face screwsCOEN stainless steel decking starter clip
- Warranty
- 25 years, residential
- Joist centres
- 450 mm maxResidential; 350 mm commercial
Colours (8)
Photos are the maker’s, credited. Render colours are sampled from the maker’s swatch images and are indicative only: order a sample before you choose.
Specifications
Every published fact, with its source and the day it was checked.
- solid corecapclip groove14025
Deck board 140 × 25 mm · 5.4 m, drawn with solid core, capped on every face, grooved on both edges for hidden clips
- 14012
Fascia 140 × 12 mm · 5.4 m, drawn with solid core, capped on every face
- 14025
Edge board 140 × 25 mm · 5.4 m, drawn with solid core, capped on every face, square edges
The board
| Fact | Published value | Source · checked |
|---|---|---|
| Material | Wood-plastic composite | Maker’s web page · checked |
| Core | Solid | Maker’s web page · checked |
| Cap | Capped all round (360°) | Maker’s web page · checked |
| Deck board | 140 × 25 mm, grooved both edges · 5.4 m lengths | Maker’s web page · checked |
| Edge board | 140 × 25 mm, square edges · 5.4 m lengths | Maker’s web page · checked |
| Fascia | 140 × 12 mm, no edge profile · 5.4 m lengths | Maker’s web page · checked |
| Recycled content | 90% | Maker’s web page · checked |
Installation
| Fact | Published value | Source · checked |
|---|---|---|
| Max joist centres, residential | 450 mm | Maker’s install guide · checked |
| Max joist centres, commercial | 350 mmSources disagree. Maker’s install guide says 400 (Same guide, p7 rule and table: 400 mm commercial.). The published value comes from the higher-ranked source; safety facts take the conservative one. | Maker’s install guide · checked |
| Gap between boards | 2 mmSources disagree. Maker’s datasheet says 4 (Genesis flyer, August 2025.); Maker’s datasheet says 3 (Hollow flyer, October 2025.). The published value comes from the higher-ranked source; safety facts take the conservative one. | Maker’s install guide · checked |
| End gap rule | Overall end gap depends on installation temperature and board length (COEN chart, guide p8). For a 5.4 m board: 8.6 mm at 10 C, 7.6 at 15 C, 6.5 at 20 C, 5.4 at 25 C, 4.3 at 30 C, 3.2 at 35 C, 2.2 at 40 C, 1.1 at 45 C. If a gap is left at both ends, halve the figure. Formula given: coefficient of linear expansion x board length (m) x (regional max or min temperature - installation temperature). Minimum 5 mm at butt joins and 5 mm to a solid structure. How this was readTranscribed from the chart image on p8 (columns 1.0, 1.8, 2.7, 3.6, 4.5, 5.4 m; rows 10-45 C). The chart looks irregular for short boards (1.0 m board: 1.2 mm at 10 C but 1.4 mm at 15 C), so confirm with COEN. Guide gives no per-metre figure. | Maker’s install guide · checked |
| Butt joints | Board ends land on a double joist How this was readGuide p12: butt-joined board ends must each sit on their own sister joist, with at least 5 mm between the sister joists for drainage; failing this voids the warranty. | Maker’s install guide · checked |
| Minimum clearance under the boards | 100 mm How this was readGuide p21: minimum ground clearance 100 mm (minimum clearance over concrete 30 mm); no separate ventilation figure is given. | Maker’s install guide · checked |
| Subframes | timber, steel and aluminium How this was readPer fixing: COEN stainless steel decking starter clip -> timber/steel/aluminium; COEN stainless steel decking clip with timber-fix screw -> timber/steel/aluminium; Stainless steel top-fix decking screw (typical 5x75 mm) -> subframes not stated | Maker’s install guide · checked |
| Fixing: hidden clip | COEN stainless steel decking starter clip | Maker’s install guide · checked |
| Fixing: hidden clip | COEN stainless steel decking clip with timber-fix screw | Maker’s install guide · checked |
| Fixing: face screw | Stainless steel top-fix decking screw (typical 5x75 mm) | Maker’s install guide · checked |
| Installation guide | Maker’s install guide · checked |
Tested performance
| Fact | Published value | Source · checked |
|---|---|---|
| Bushfire attack level (AS 3959) | BAL-29 | Maker’s datasheet · checked |
| Slip resistance (AS 4586) | P4 (wet pendulum) | Sliptest slip test report · checked |
Warranty
| Fact | Published value | Source · checked |
|---|---|---|
| Warranty, residential | 25 years How this was readWarranty text: Genesis solid decking up to 25 years from the original purchase order date; website and flyer say '25-year warranty'. The document does not split residential from commercial use. | Maker’s warranty · checked |
| Warranty conditions | Manufacturing defects only, when the product is used as intended and installed/cared for per COEN's published guidelines; the period runs from the original purchase order date. Not transferable (original purchaser who bought from ACW only). Claim within 30 days of finding the issue, with purchase order, written account and photos; ACW inspects, then repairs, replaces or refunds at its option, and the claimant pays removal, reinstallation and freight. Excludes accident, misuse, fire, acid/alkali, severe weather or natural disaster and other external causes (wording adds 'excluding rot and termite damage'), use outside the installation guide, modification, unapproved products, normal wear, transport damage, colour/texture variation or fading 'outside of the expected range', relocated product and frame/support parts. Statutory consumer rights are preserved. No pro-rata terms, ventilation rule or registration step is stated. | Maker’s warranty · checked |
Other published facts (17)
Other published facts
| Fact | Published value | Source · checked |
|---|---|---|
| Marketing description | 'Premium fully encapsulated' board with dual-sided contrasting colours; hidden clip system; page text says 'six colour tones' while eight swatches are shown | Maker’s web page · checked |
| Nominal composition (COEN FAQ) | 60% wood powder, 30% HDPE, 10% additives | Maker’s web page · checked |
| Sample composition on AWTA ISO 9239.1 report (Genesis Terra Tough Decking, brown/grey) | 60% woodflour, 28% HDPE, 12% additives; density 1.46 g/cm3; 25 mm thick | Wool Testing Authority datasheet · checked |
| Sample composition on AWTA BAL-labelled report (grey WPC decking board) | 60% wood flour, 25% HDPE, 5% calcium compound, 10% additives; 34.7 kg/m2 at 25 mm | Wool Testing Authority BAL test report · checked |
| BAL-labelled report results (AS/NZS 3837:1998, 25 kW/m2) | Average heat release rate 53.4, 47.1, 53.0 kW/m2 (specimens 1-3; mean 51.2); average specific extinction area 83.5, 95.6, 85.1 m2/kg (mean 88.1); horizontal orientation; wire grid placed over sample | Wool Testing Authority BAL test report · checked |
| Radiant heat floor test AS ISO 9239.1-2003 (report 25-002239, 21 Jul 2025) | Critical heat flux reported as >= 11.0 kW/m2 (mean, length direction); smoke value mean 5 %.min; HF30 not reported as flame-out occurred before 30 minutes; specimens clamped to 6 mm fibre-cement board | Wool Testing Authority datasheet · checked |
| Bending test (CQUniversity, tested 29/08/2018, specimen named COEN Composite Wood - Solid Decking 140x25) | Spans 400/500/600 mm: max load 5142/3860/3210 N; modulus of elasticity 3324/3558/3606 MPa; modulus of rupture 33.7/32.7/32.9 MPa (2018 test, not named Genesis) | CQUniversity Structures Laboratory datasheet · checked |
| R12 slip report (downloads page 'R12 Slip Rating') | CSIRO Infrastructure Technologies report 7885.1, issued and tested 5 June 2017, oil-wet ramp method per AS 4586:2013 Appendix D, Slip Resistance Laboratory (Clayton VIC): product 'Composite Wood Decking = CN 007A' (manufacturer field blank), sample unfixed, joint width 0 mm, profiled surface, corrected mean overall acceptance angle 27 degrees, displacement space not tested, Slip Resistance Assessment Group R 12, test shoe Uvex Athletic. Text is drawn as vector outlines (no text layer) and the report never names Genesis Terra Tough | CSIRO Infrastructure Technologies slip test report · checked |
| R12 slip claim | Aug 2025 flyer lists 'R12 & P4 slip rating' for Genesis; the 2026 website lists only P4 | Maker’s datasheet · checked |
| Expected fade allowance in warranty | Exclusion wording gives expected fade of 1% to 5% for Gen 2 products and 3% to 5% (up to 15%) for Gen 1 products, depending on colour and application | Maker’s warranty · checked |
| Product generation | COEN's Aug 2025 blog describes its range as 'Generation 2' decking, cladding, screening, fencing and sleepers | Maker’s web page · checked |
| Stair treads | Solid boards only (hollow prohibited, voids warranty); at least 4 stringers; max stringer spacing 300 mm for Terra Tough Solid Decking and Edge Board; overhang no more than 15 mm | Maker’s install guide · checked |
| Breaker boards and other limits | Breaker board recommended when a run exceeds two full board lengths; not suitable over existing decking boards; no toe-screwing; 70 boards per pack | Maker’s install guide · checked |
| Joist protection tape | CN-Joist Protection Tape, 20 m roll, 1 roll per 8 m2 | Maker’s web page · checked |
| Cut-to-length supply | COEN says it cuts decking, cladding and screening to length for volume and modular programs instead of 5.4 m stock boards (quoted 12-week delivery from order confirmation; 8-10 week factory lead time) | Maker’s web page · checked |
| Previous installation guide (July 2025) | Technical tables match the 2026 guide; the decking product page still links this older PDF while the downloads page links the 2026 one | Maker’s install guide · checked |
| Downloads page listing | Lists the Decking Flyer, Hollow Decking Flyer, AS/NZS 1530.3:1999, AS/NZ 4266.5 solid and hollow certificates, AS ISO 9239.1-2003, BAL 29 certificate, P4 and R12 slip ratings, decking installation guide and the warranty | Maker’s web page · checked |
Every fact here carries its source and the day it was checked. Documents opened 6 Oct 2026.
Prices by state
Set your state once and every price on this site is quoted for it, including GST. Then this page shows the COEN Genesis Terra Tough prices in your state: each the average of the sellers we track there.
Price on request. No seller we track publishes a COEN Genesis Terra Tough price anywhere in Australia yet. That means no data, not that it isn’t sold.
It can still be quoted: draw your deck in the free designer and get your free deck pack. Local builders and suppliers quote from it.
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Documents
The maker’s own documents, linked where they publish them (never re-hosted).
- Installation guideCOEN Decking Installation Guide 2026 (22 pp; PDF created 22 Jan 2026, posted Mar 2026)
- DatasheetCOEN Decking Flyer 2025 (Genesis Decking and Select Decking, Aug 2025)
- WarrantyAustralian Composite Wood Product Warranty (March 2025)
- Slip test reportWet Sliptest report KO290525-4, Genesis Terra Tough Decking - Beach (AS 4586:2013 App. A)
All 15 sources behind this page
- COEN Composite Timber Decking product page (Genesis Terra Tough, Terra Tough Hollow, profiles, colours, accessories)
- COEN Decking Installation Guide 2026 (22 pp; PDF created 22 Jan 2026, posted Mar 2026)
- COEN Decking Flyer 2025 (Genesis Decking and Select Decking, Aug 2025)
- Australian Composite Wood Product Warranty (March 2025)
- Wet Sliptest report KO290525-4, Genesis Terra Tough Decking - Beach (AS 4586:2013 App. A)
- COEN Terra Tough Hollow Decking flyer (Oct 2025)
- COEN FAQ page (manufacture, recycled content, where to buy)
- AWTA Product Testing report 25-002239, AS ISO 9239.1-2003, Genesis Terra Tough Decking (21 Jul 2025)
- AWTA Product Testing report 24-004112 (listed on COEN downloads page as 'BAL 29 Certificate', file BAL-29-Nov-2024.pdf)
- CQUniversity structural test report, AS/NZS 4266.5:2004 bending, COEN Solid Decking 140x25 (test date 29/08/2018)
- CSIRO Infrastructure Technologies report 7885.1, oil-wet ramp slip test, 'Composite Wood Decking = CN 007A' (5 Jun 2017); listed on COEN downloads page as 'R12 Slip Rating'
- COEN blog post 'Eco Decking' (15 Aug 2025)
- COEN Plan Your Project page (cut-to-length programs)
- COEN Decking Installation Guide 2025 (PDF created 11 Jul 2025; still linked from the decking product page)
- COEN Downloads / Resources page (certificate and guide listing)
Facts are taken from the highest-ranked source (certificates and test reports, then install guides and datasheets, then warranties, then web pages); when sources disagree the specification says so, and safety facts take the conservative value. Every plan the designer draws from these figures is a concept plan, not for construction: the span tables behind its framing have been checked by a structural engineer, but a builder, building surveyor or certifier must check the plan before you build.
Similar boards
Other COEN ranges, and boards of the same material in similar colours.
Priceset stateCOENComposite
Terra Tough Hollow
- Alkira
- Beach
- Marine Teak
- Chocolate
Board: 140 × 25 mmCore: Hollow coreFixing: Hidden clipsPrice: Price on request
Priceset stateNewTechWoodComposite
Terrace
- Antique
- Blackbutt
- Teak
- Ipe
- Silver Grey
Board: 138 × 25 mmCap: CappedFixing: Hidden clips or screws
Priceset stateNewTechWoodComposite
Soho
- Blonde Oak
- Merbau
- Grey Ironbark
Board: 138 × 25 mmCap: CappedFixing: Hidden clips or screws
Priceset stateEkodeckComposite
Designer Series
- Alpine Ash
- Ironwood
- Backbeach
- Leatherwood
- Riverbank Red
- Estate Brown
Board: 137 × 23 mmCap: CappedFixing: Hidden clips or screws
