ModWood Natural Grain
ModWoodCompositeSolid core
From $139 per m² across Australia, inc GST
$68.92 per 5.4 m board
Set your state
4 colours: pick one to see it
- Board sizes
- 88 × 23 mm, 137 × 23 mm5.4 m lengths
- Cap
- Uncapped
- Core
- Solid
- Fixing
- Face screws or hidden clips8-gauge x 50 mm countersunk-head screws
- Warranty
- 10 years, residential
- Joist centres
- 450 mm maxResidential, 88 mm board
Colours (4)
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 coreclip groove13723
Deck board 137 × 23 mm · 5.4 m, drawn with solid core, uncapped, grooved on both edges for hidden clips
- 13723
Deck board 137 × 23 mm · 5.4 m, drawn with solid core, uncapped, square edges
- 8823
Deck board 88 × 23 mm · 5.4 m, drawn with solid core, uncapped, grooved on both edges for hidden clips
The board
| Fact | Published value | Source · checked |
|---|---|---|
| Material | Wood-plastic composite | Maker’s datasheet · checked |
| Core | Solid | Maker’s datasheet · checked |
| Cap | Uncapped | Maker’s datasheet · checked |
| Deck board | 88 × 23 mm, grooved both edges · 5.4 m lengths | Maker’s datasheet · checked |
| Weight (88 × 23) | 2.3 kg per metre | Maker’s datasheet · checked |
| Deck board | 137 × 23 mm, grooved both edges · 5.4 m lengths | Maker’s datasheet · checked |
| Weight (137 × 23) | 3.6 kg per metre | Maker’s datasheet · checked |
| Deck board | 137 × 23 mm, square edges · 5.4 m lengths How this was readNew square-edge profile for NGC 137x23 announced in the August 2026 brochure ("Available now"; flash reads "Avail August 2026"). No separate fixing table or slip report for this profile was found. | Maker’s datasheet · checked |
| Made in | Australia | Maker’s datasheet · checked |
Installation
| Fact | Published value | Source · checked |
|---|---|---|
| Max joist centres, residential (88 × 23) | 450 mm | Maker’s install guide · checked |
| Max joist centres, residential (137 × 23) | 450 mm | Maker’s install guide · checked |
| Max joist centres, commercial (137 × 23) | 450 mm | Maker’s install guide · checked |
| Gap between boards | 4 mm | Maker’s install guide · checked |
| End gap rule | Butt joins 2 mm · To walls and solid structures 6 mm · Max overhang: 88 × 23 mm grooved 45 mm; 137 × 23 mm grooved 70 mm · Fix when ambient temperature is below 25 C and boards are not in full sun (boards in full sun run 20-25 C above ambient). Thermal expansion 0.000015 mm/mm/C: a 5400 mm board moves about 3 mm over a 40 C swing. | Maker’s install guide · checked |
| Butt joints | Board ends land on a double joist | Maker’s install guide · checked |
| Minimum clearance under the boards | 300 mm | Maker’s install guide · checked |
| Subframes | timber and steel How this was readTimber and steel joists covered by the fixing list (tek screws for steel; nail guns not recommended on steel), although the chart row "suitability for fixing to steel substructures" reads "refer to website" for NGC. Aluminium joists are not mentioned. ModWood boards are not structural and must not be used as bearers or joists. | Maker’s install guide · checked |
| Fixing: face screw | 8-gauge x 50 mm countersunk-head screws | Maker’s install guide · checked |
| Fixing: face screw | 2.8 x 50 mm dome-head twist-shank nails | Maker’s install guide · checked |
| Fixing: face screw | 10-gauge x 40 mm self-tapping tek screws (steel) | Maker’s install guide · checked |
| Fixing: hidden clip | KlevaKlip Snap-Loc KSL88N (88 mm), KSL137N (137 mm) | Maker’s install guide · checked |
| Fixing: hidden clip | KlevaKlip top-fix clips KT88G / KT88S / KT137G / KT137S (galvanised / stainless) | Maker’s install guide · checked |
| Installation guide | Maker’s install guide · checked |
Tested performance
| Fact | Published value | Source · checked |
|---|---|---|
| Bushfire attack level (AS 3959) | No BAL rating stated How this was readQ&A (Nov 2025): only Flame Shield may be used in BAL-rated zones; "our non-flame retardant decking boards and mini boards must not be used in BAL rated zones". The NGC product page carries a site-wide "Up to BAL-40 Ranking" banner that refers to Flame Shield (not a claim about NGC). CodeMark CM70175 tests only Flame Shield for bushfire. | Maker’s datasheet · checked |
| Slip resistance (AS 4586) | R10 (oil-wet ramp) | Maker’s datasheet · checked |
| Slip resistance (AS 4586) | R11 (oil-wet ramp) | Maker’s datasheet · checked |
Warranty
| Fact | Published value | Source · checked |
|---|---|---|
| Warranty, residential | 10 years | Maker’s datasheet · checked |
| Warranty, commercial | 7 years | Maker’s datasheet · checked |
| Fade and stain warranty | No cover stated | Maker’s warranty · checked |
Other published facts (3)
Other published facts
| Fact | Published value | Source · checked |
|---|---|---|
| Slip resistance, other methods (as published) | Wet pendulum 2004class (88 × 23 mm grooved): Y · Wet pendulum 2004class (137 × 23 mm grooved): Y | Maker’s datasheet · checked |
| Recycled content (as published) | >85% recycled and reclaimedSources disagree. Maker’s datasheet says approx 90% recycled or reclaimed (August 2026 brochure and Marina leaflet.). The published value comes from the higher-ranked source; safety facts take the conservative one. | Maker’s web page · checked |
| Fixing notes (as published) | Nail gun: C2.5 x 52 dome stainless coil nails (ring shank for softwood, screw shank for hardwood); Paslode Duo-Fast CNP 65 preferred; pre-drill and hand-nail within 50 mm of board ends; not on steel joists How this was readTimber (up to 23 mm boards): 8-gauge x 50 mm countersunk-head screws or 2.8 x 50 mm dome-head twist-shank nails. Steel: 10-gauge x 40 mm self-tapping tek screws. Over 23 mm boards: 10-gauge x 65 mm (timber) / 10-gauge x 50 mm (steel). Pre-drill and countersink; fasteners no closer than 15 mm to a board end or 20 mm to an edge; galvanised in low-corrosion areas, stainless in high-corrosion areas. Stainless clips (KSL..N or stainless) must be used around pools and within 1 km of salt water. | Maker’s install guide · 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 ModWood Natural Grain prices in your state: each the average of the sellers we track there.
ModWood Natural Grain: national averages, across Australia
| Board size | Average $/m² | Per board | Sellers | Prices to |
|---|---|---|---|---|
| ModWood Natural Grain 88 × 23 | $138.72 | $68.92 / 5.4 m | 6 | |
| ModWood Natural Grain 137 × 23 | $143.62 | $109.35 / 5.4 m | 6 |
Prices from 8 sellers across Australia. We don’t list the whole market, so other sellers may have different prices. Seen 14–15 Oct 2026.
Prices include GST. Each is the average of the sellers we track for that board, each seller counted once, with any price more than 25% from the middle one left out; sample data is badged.
How we get these prices
Each price is an average of the retail prices we have seen for that board, with any price more than 25% above or below the middle price left out. Each seller counts once. Prices include GST and are per square metre of deck (the board’s cover width plus the gap beside it) and per board. Prices were seen on the dates shown on sellers’ own price lists and websites; confirm with the seller before you buy. 1 seller’s price was left out as more than 25% from the middle one. Price on request for ModWood Natural Grain 137 × 23: no seller we track prices it yet.
Per lineal metre: ModWood Natural Grain 88 × 23 average $12.76 · ModWood Natural Grain 137 × 23 average $20.25.
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Documents
The maker’s own documents, linked where they publish them (never re-hosted).
- Installation guideModWood Fixing Instructions (decking: 88x23, 137x23, Marina 137x32) - September 2021
- DatasheetCodeMark Certificate of Conformity CM70175 Rev2 - ModWood Decking (issued 31 Jul 2025, revalidated 10 Jun 2026, expires 31 Jul 2028)
- DatasheetModWood Technical Sheet (June 2020): weights, CSIRO slip tests, thermal expansion, mechanical properties
- WarrantyModWood Limited [domestic/commercial] Warranty - generic template used for Natural Grain Collection ([10/7 years])
All 9 sources behind this page
- ModWood product brochure (August 2026) incl. fixing-specification table and ITI distributor list
- Questions and Answers on ModWood (November 2025)
- ModWood - Natural Grain Collection product page
- ModWood Fixing Instructions (decking: 88x23, 137x23, Marina 137x32) - September 2021
- CodeMark Certificate of Conformity CM70175 Rev2 - ModWood Decking (issued 31 Jul 2025, revalidated 10 Jun 2026, expires 31 Jul 2028)
- ModWood Technical Sheet (June 2020): weights, CSIRO slip tests, thermal expansion, mechanical properties
- ModWood Limited [domestic/commercial] Warranty - generic template used for Natural Grain Collection ([10/7 years])
- ModWood - Installation page (overhang limits, temperature advice)
- ModWood - Colour range page (swatches)
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 ModWood ranges, and boards of the same material in similar colours.
Priceset stateModWoodComposite
Xtreme Guard
- Charwood
- Fire Brick
- Koko Brown
- Magnetic Grey
- Sandy Bay
Board: 137 × 23 mmCap: CappedFixing: Hidden clips or screws
Priceset stateModWoodComposite
Flame Shield
- Black Bean
- Jarrah
- Sahara
- Silver Gum
Board: 137 × 23 mmCap: UncappedFixing: Hidden clips or screws
Priceset stateModWoodComposite
Marina
- Black Bean
- Jarrah
- Sahara
- Silver Gum
Board: 137 × 32 mmCap: UncappedFixing: Hidden clips or screws
Priceset stateNewTechWoodComposite
Terrace
- Antique
- Blackbutt
- Teak
- Ipe
- Silver Grey
Board: 138 × 25 mmCap: CappedFixing: Hidden clips or screws
