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COEN Terra Tough Hollow in Alkira

COENCompositeHollow core

Priceon request

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.

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4 colours

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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

Alkira: 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.

This colour page summarises the COEN Terra Tough Hollow page. Colour page canonicalised to its range: 0 hosted photos (need 6) and no notes unique to this colour.

Other colours of Terra Tough Hollow (3)

Photos are the maker’s, credited. Render colours are indicative only.

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

3 profiles drawn to one scale from the published sizes · Maker’s web page · checked . Interiors are schematic: cell shapes and cap thickness vary by maker.

The board

FactPublished valueSource · 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 read

Listed 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

FactPublished valueSource · checked
Max joist centres, residential
400 mm
Maker’s install guide · checked
Max joist centres, commercial
350 mm
How this was read

Guide 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 read

Transcribed 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 read

Guide 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 read

Guide 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 read

Per 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 guide, 2026 edition (Decking Installation Guide, 22 pages), 2026-01-22
Maker’s install guide · checked

Tested performance

FactPublished valueSource · checked
Slip resistance (AS 4586)
P4 (wet pendulum)
Maker’s web page · checked

Warranty

FactPublished valueSource · 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 read

General 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

FactPublished valueSource · 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.

Used for state prices. Kept on this device; never guessed from your location.

Or pick a state

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.

Get quotes with your deck pack

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Documents

The maker’s own documents, linked where they publish them (never re-hosted).

All 7 sources behind this page
  1. COEN Composite Timber Decking product page (Genesis Terra Tough, Terra Tough Hollow, profiles, colours, accessories) · COEN Composite Wood (Australian Composite Wood Pty Ltd) · opened
  2. COEN Terra Tough Hollow Decking flyer (Oct 2025) · COEN Composite Wood · opened
  3. COEN Decking Installation Guide 2026 (22 pp; PDF created 22 Jan 2026, posted Mar 2026) · Australian Composite Wood Pty Ltd (COEN Composite Wood) · opened
  4. Australian Composite Wood Product Warranty (March 2025) · Australian Composite Wood Pty Ltd (COEN Composite Wood) · opened
  5. COEN Decking Flyer 2025 (Genesis Decking and Select Decking, Aug 2025) · COEN Composite Wood · opened
  6. COEN home page (range summaries, composition, ISO statement) · COEN Composite Wood · opened
  7. CQUniversity structural test report, AS/NZS 4266.5:2004 bending, COEN Hollow Decking 140x25 (test date 29/08/2018) · CQUniversity Australia Structures Laboratory · opened

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.

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