Blackbutt 135 x 21mm hardwood decking - product photography

135x21 Blackbutt Hardwood Decking

$20.86 + GST $22.95 incl. GST per LM
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Blackbutt 135 x 21mm hardwood decking - product photography
  • Blackbutt 135 x 21mm hardwood decking - product photography
  • Blackbutt 135 x 21mm hardwood decking - product photography
  • Blackbutt 135 x 21mm hardwood decking - product photography
  • Blackbutt 135 x 21mm hardwood decking - product photography
  • Blackbutt 135 x 21mm hardwood decking - product photography
  • Blackbutt 135 x 21mm hardwood decking - product photography
  • Blackbutt 135 x 21mm hardwood decking - product photography
  • Blackbutt 135 x 21mm hardwood decking - product photography

Images are for illustration purposes only. Timber is a natural material; colour, grain and appearance will vary between boards.

135x21 Blackbutt Hardwood Decking
Pre-order

Available to order. Contact us for current lead time.

135x21 Blackbutt Hardwood Decking

$20.86 + GST $22.95 incl. GST per LM
Taxes included.

Quantity below = linear metres. Random lengths are supplied. Preferred individual lengths can be requested by quote.
Linear metres
1
Total LM
1.0 m
Subtotal (inc. GST)
$22.95

135x21 mm Blackbutt decking gives a wider board line in the same straight grained Australian hardwood, with creamy blonde to rich honey tones. The supplier specification sheet publishes Class 1 above-ground durability with a 40+ year service expectation, and a BAL 29 rating under AS 3959-2009.

The wide board suits open decks and outdoor rooms where fewer joins and a cleaner deck line matter.

Sold per linear metre in random lengths. Preferred lengths, pack quantities and bulk pricing are quoted against current supplier availability.

Looking for 140x19 decking? This board measures 135 mm across the face, not 140 mm. Laid with the standard 4 mm gap it covers 139 mm of deck per board against 144 mm for a 140 mm board, so a 140x19 deck needs about 3.5 percent fewer linear metres for the same area. Our genuine 140x19 decking is 140x19 Merbau and 140x19 Peninsula Blonde, both imported hardwoods rather than Australian Class 1 species. Board thickness options across our decking range are compared in our 135 x 19 vs 135 x 35 decking guide.

Timber calculator

Calculating for: 135x21 Blackbutt Hardwood Decking

Calculator mode
Area to linear metres

Supplied in random lengths, so there is no length to choose: order the total linear metres you need.

Enter your measurements and select Calculate to see an estimate.

How this is calculated

Cover width (m) = (board width + gap) ÷ 1000

Linear metres required = area ÷ cover width

Linear metres with wastage = linear metres × (1 + wastage ÷ 100)

Reverse: estimated coverage area = linear metres × cover width

Estimates only. Confirm final quantities against your measured plans and the product's actual cover width before ordering.

Available sizes

Each size is its own product with its own pricing and stock. Selecting a size takes you to that product.

Specifications

Species Blackbutt
Treatment Kiln Dried
Nominal dimensions 135 × 21 mm
Supplied lengths Random lengths
Selling unit Per linear metre (LM)
Coverage width 139 mm

Need a different length, grade or quantity? Request a quote.

Guidance

Working with this timber

Technical profile

From the supplier specification sheet: Blackbutt (Eucalyptus pilularis) carries a High seasoned strength rating (SD2) with Janka hardness 8.9 (Hard) and density of 990 to 1100 kg/m3. The species is BAL 29 rated under AS 3959-2009, termite resistant, and rated Class 1 above-ground durability with a 40+ year service expectation.

Applications

Decking, screening and general outdoor work where an even, lighter-toned Australian hardwood is wanted.

Installation
  • Store boards flat, fully supported and off the ground, and keep them dry before installation. Allow the timber to acclimatise at the site before fixing.
  • Fix with hot dipped galvanised or stainless steel screws, two per joist, pre-drilled and countersunk. Stainless steel fixings are recommended for coastal or poolside work.
  • Maintain ventilation gaps between boards and adequate ground clearance so the deck can dry out; the supplier installation guidelines under Documents and downloads set out clearances in detail.
  • Use sharp, quality cutting tools and seal cut ends with decking oil. Wear appropriate eye, ear and breathing protection when cutting.

Maintenance
  • Clean the surface before coating; an oxalic acid based timber cleaner removes dirt, grease and tannin stains.
  • Finish with a penetrating decking oil per the coating manufacturer's label, then re-coat on a regular cycle suited to exposure and traffic.
  • Monitor the coated timber for colour loss and dryness, and re-coat when it begins to look dry to maintain protection.

Delivery

Delivery is quoted per order based on load, length and access. See Delivery And Pickup for coverage areas.

Pickup

Pickup is available for confirmed orders; arrangements and location details are confirmed at order stage.

Documents and downloads

Product documents are added as they are confirmed with our suppliers.

Explore other hardwood species

Browse our other hardwood species. Available profiles and sizes vary by species.

Need more than listed?

Different lengths, grades or bulk quantities

  • Long-length and mixed-length orders
  • Pack and pallet pricing
  • Supply confirmed with our suppliers before you pay
Request A Quote

Common questions

How is this timber sold?

This product is sold per linear metre (LM). See our LM and m² guide for how that works.

When will pricing and stock show?

Products go live as supplier pricing and availability are confirmed. Anything not yet live can be quoted.

Can I pick up?

Pickup is available for confirmed orders. Pickup arrangements are confirmed at order stage.

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Ready to price your project?

Send through your specifications and quantities and we will come back with a supply-backed quote.

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