COEN Terra Tough Hollow in Marine Teak
COENCompositeHollow core
4 colours
- Board size
- 140 × 25 mm5.4 m lengths
- Cap
- Not published
- Core
- Hollow
- Fixing
- Hidden clipsCOEN stainless steel decking starter clip
- Warranty
- 15 years, residential
- Joist centres
- 400 mm maxResidential; 350 mm commercial
Marine Teak: render colour, indicative. Sampled from the maker’s swatch image (Maker’s web page) on 6 Oct 2026 for the designer’s 3D view; never the real board. Order a sample before you choose.
Specifications
Every published fact, with its source and the day it was checked.
- hollow coreclip groove14025
Deck board 140 × 25 mm · 5.4 m, drawn with hollow core, cap not stated, grooved on both edges for hidden clips
- 14012
Fascia 140 × 12 mm · 5.4 m, drawn with hollow core, cap not stated
- 14025
Edge board 140 × 25 mm · 5.4 m, drawn with hollow core, cap not stated, square edges
The board
| Fact | Published value | Source · checked |
|---|---|---|
| Material | Wood-plastic composite | Maker’s web page · checked |
| Core | Hollow | Maker’s web page · checked |
| Deck board | 140 × 25 mm, grooved both edges · 5.4 m lengths How this was readListed in the hollow table under the name 'Genesis Composite Timber Decking' with a hollow cross-section image; 5.4 m. Edge 'grooved' is a deduction, not a hollow-specific statement: the guide says clip teeth seat in the board groove and the hollow column is clip-fixed only (18 clips per m2, no face screw). Weight per metre not published. | Maker’s web page · checked |
| Recycled content | 90% | Maker’s web page · checked |
Installation
| Fact | Published value | Source · checked |
|---|---|---|
| Max joist centres, residential | 400 mm | Maker’s install guide · checked |
| Max joist centres, commercial | 350 mm How this was readGuide p21 and hollow flyer list only 'Light Commercial 350-400' for hollow (lower end used); p7 table lists Select Hollow at 400 for commercial. | 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 (applies to COEN decking generally): each board end on its own sister joist, minimum 5 mm between sister joists. | Maker’s install guide · checked |
| Minimum clearance under the boards | 100 mm How this was readGuide p21 hollow column: minimum ground clearance 100 mm (30 mm over concrete); no separate ventilation figure. | 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 | 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 |
| Installation guide | Maker’s install guide · checked |
Tested performance
| Fact | Published value | Source · checked |
|---|---|---|
| Slip resistance (AS 4586) | P4 (wet pendulum) | Maker’s web page · checked |
Warranty
| Fact | Published value | Source · checked |
|---|---|---|
| Warranty, residential | 15 years | Maker’s web page · 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. How this was readGeneral ACW warranty terms; the document names Select hollow decking rather than Terra Tough Hollow. | Maker’s warranty · checked |
Other published facts (7)
Other published facts
| Fact | Published value | Source · checked |
|---|---|---|
| Surface finish | Home page card for Hollow Terra Tough lists 'Brushed finish' and says 'available in hollow or solid profiles' with a '15-year warranty (hollow)' | Maker’s web page · checked |
| Fixing rule for hollow | Hollow flyer: in all cases do not screw-fix hollow boards (clips only); the spec table gives no top-fix screw for hollow | Maker’s datasheet · checked |
| Other colours | Hollow flyer says other colours are available on request | Maker’s datasheet · checked |
| Stair treads | Hollow boards must not be used for stair treads (strictly prohibited, voids warranty); use solid boards | Maker’s install guide · checked |
| Bending test (CQUniversity, tested 29/08/2018, specimen named COEN Composite Wood - Hollow Decking 140x25) | Spans 400/500/600 mm: max load 3963/2995/2314 N; modulus of elasticity 3175/3147/3425 MPa; modulus of rupture 26.9/24.3/22.9 MPa (2018 test) | CQUniversity Structures Laboratory datasheet · checked |
| Hollow board spec-table values (guide p21) | Boards per pack 70; min end-gap at butt join 5 mm; min gap to solid structure 5 mm; one starter clip per joist; 18 clips per m2 | Maker’s install guide · checked |
| Select Decking in the Aug 2025 flyer | Select Decking (Oak, Jarrah, Ash Grey, Charcoal; solid 20-year and hollow 15-year warranty; 'R12 & P3 slip rating'; timber grain or brushed finish; hollow or solid) is listed in the Aug 2025 flyer but is not on the 2026 decking product page | Maker’s datasheet · checked |
These are the rows for this colour’s board. The full specification, with every profile, is on the COEN Terra Tough Hollow page.
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 Terra Tough Hollow prices in your state: each the average of the sellers we track there.
Price on request. No seller we track publishes a COEN Terra Tough Hollow 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 Terra Tough Hollow Decking flyer (Oct 2025)
- WarrantyAustralian Composite Wood Product Warranty (March 2025)
All 7 sources behind this page
- COEN Composite Timber Decking product page (Genesis Terra Tough, Terra Tough Hollow, profiles, colours, accessories)
- COEN Terra Tough Hollow Decking flyer (Oct 2025)
- COEN Decking Installation Guide 2026 (22 pp; PDF created 22 Jan 2026, posted Mar 2026)
- Australian Composite Wood Product Warranty (March 2025)
- COEN Decking Flyer 2025 (Genesis Decking and Select Decking, Aug 2025)
- COEN home page (range summaries, composition, ISO statement)
- CQUniversity structural test report, AS/NZS 4266.5:2004 bending, COEN Hollow Decking 140x25 (test date 29/08/2018)
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
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Board: 140 × 25 mmCap: CappedFixing: Hidden clips or screwsPrice: Price on request
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Board: 138 × 25 mmCap: CappedFixing: Hidden clips or screws
Priceset stateNewTechWoodComposite
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Board: 138 × 25 mmCap: CappedFixing: Hidden clips or screws
Priceset stateEkodeckComposite
Designer Series
- Alpine Ash
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Board: 137 × 23 mmCap: CappedFixing: Hidden clips or screws
