Merbau
Merbau decking, dressed timber, engineered beams, laminated posts, stair treads and mouldings, picked and packed to order for Adelaide and South Australia.
Merbau Timber in Adelaide
Merbau is the hardwood Australians know best from decks and pergolas: a dense, naturally durable timber with a rich red-brown colour that deepens beautifully under oil. It machines well, holds fixings strongly and stands up to the weather, which is why it turns up everywhere outdoors, from deck frames and posts to screens, stairs and feature beams.
Allmat carries a deep merbau range for Adelaide and South Australia: decking, Select grade dressed boards, GL17 engineered beams, pre-oiled GL13 sections up to 420mm deep, laminated posts up to 190 × 190, stair treads and matching mouldings.
We pick and pack to order. Holding every size of everything timber at our Gillman yard would take a yard the size of a suburb, so the range sits in bulk storage behind it and stock comes into Gillman for picking, packing and dispatch.
Send us the list and we will quote it, or come and talk the job through at the yard.

The Merbau Range
Picked and packed to order from bulk storage. Sizes are in millimetres; lengths shown per item.
Merbau Decking
- 90 × 19 Merbau Decking
- 140 × 19 Merbau Decking E4E Reeded
Dressed Merbau (Select Grade)
- 42 × 30 Merbau KD F/J DAR, 5.4m
- 66 × 18 Merbau KD F/J DAR, 5.4m
- 70 × 42 Merbau KD Select DAR E4E, 4.8m and 6.0m
- 90 × 42 Merbau KD Select DAR E4E, 4.8m and 6.0m
- 140 × 42 Merbau KD Select DAR, 4.8m and 6.0m
- 190 × 42 Merbau KD Select DAR, 4.8m and 6.0m
- 240 × 42 Merbau KD Select DAR, 4.8m and 6.0m
- 290 × 42 Merbau KD Select DAR, set lengths 2.4m to 6.0m
Engineered Merbau Beams (GL17)
- 70 × 42 Merbau KD Select GL17 DAR E4E, 6.0m
- 90 × 42 Merbau KD Select GL17 DAR E4E, 3.6m to 7.2m
- 140 × 42 Merbau KD Select GL17 DAR E4E, 3.6m to 7.2m
- 190 × 30 Merbau GL17 DAR, 6.0m
- 190 × 42 Merbau KD Select GL17 DAR E4E, 3.6m to 7.2m
- 190 × 65 Merbau KD Select GL17 DAR E4E, 4.8m to 7.2m
- 240 × 42 Merbau KD Select GL17 DAR E4E, 3.6m to 7.2m
- 240 × 65 Merbau KD Select GL17 DAR E4E, 4.8m to 7.2m
- 240 × 80 Merbau GL17 DAR, 4.8m to 7.2m
- 290 × 42 Merbau KD Select GL17 DAR E4E, 3.6m to 7.2m
- 290 × 65 Merbau KD Select GL17 DAR E4E, 4.8m to 7.2m
- 290 × 80 Merbau GL17 DAR, 4.8m to 7.2m
Pre-Oiled Engineered Merbau (GL13)
- 252 × 65 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.8m
- 252 × 85 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.8m
- 294 × 65 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.8m
- 294 × 85 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.8m
- 336 × 65 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.8m
- 336 × 85 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.8m
- 378 × 85 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.8m
- 420 × 65 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.2m
- 420 × 85 Merbau KD Select GL13 Oiled DAR E4E, 3.6m to 7.2m
Merbau Posts
- 90 × 90 Merbau Select DAR solid post, 2.4m, 3.0m and 3.6m
- 120 × 120 Merbau Select DAR solid post, 3.6m
- 90 × 90 Merbau KD F/J Laminated GL13 DAR Post, 2.4m to 6.0m
- 115 × 115 Merbau KD F/J Laminated GL13 DAR Post, 2.4m to 6.0m
- 140 × 140 Merbau Laminated GL13 DAR Post, 3.0m to 6.0m
- 190 × 190 Merbau Laminated GL13 DAR Post, 3.0m to 6.0m
Merbau Stair Treads
- 240 × 42 Merbau KD Stair Tread, 2.4m
- 255 × 42 Merbau KD Stair Tread, 2.4m
- 290 × 42 Merbau KD Stair Tread, 2.4m
Merbau Mouldings & Finishing
- 18 × 18 Merbau KD F/J Quad, 3.6m and 5.4m
- 30 × 30 Merbau KD F/J Scotia, 3.6m and 5.4m
- 42 × 10 Merbau KD F/J Cover Strip, 5.4m
Decking profiles are subject to supply. If a size is not listed, ask: the range runs deeper than one page, and we will quote the whole job together, decking included.
Merbau FAQs
It depends on the sizes and the quantity, so we confirm the lead time when we quote. Allmat picks and packs to order, with the merbau range backed by bulk storage behind our Gillman yard. Send the list through and we will come back with pricing and timing, usually the same day.
Yes, that is its reputation. Merbau is a dense, naturally durable hardwood and one of the most popular outdoor timbers on the Australian market, used for decks, pergolas, posts, screens and stairs. Like any outdoor timber, it lasts best with a coat of decking oil and sensible detailing.
Fresh merbau can leach reddish-brown tannins when it first gets wet, which can mark light-coloured paving and render. It settles down after the early weathering. Pre-oiling helps manage it, which is one reason our engineered GL13 range comes oiled, and it is worth planning for around new paving.
They are glue-laminated (engineered) merbau, built up from laminates and graded for structural use, with the number indicating the stress grade. Laminated sections are straighter and more stable than solid timber and come in sizes solid merbau cannot, up to 420mm deep beams and 190 × 190 posts in this range.
Timber shorthand. KD is kiln dried. F/J is finger jointed, short lengths joined into long stable ones. DAR is dressed all round, machined smooth on all four faces. E4E is eased four edges, a slight rounding on the edges so they are not sharp. DPR, which you will see on some hardwoods, is dressed with pencil round edges.
Yes, in 90 × 19 and 140 × 19 profiles, subject to supply, listed in the range above. Our decking page covers the wider decking picture across species, and we are happy to quote the deck boards alongside the posts, beams and stair treads here so the whole job arrives together.
Get a Merbau Quote
Send us your list with sizes and lengths and we will get pricing and lead times back to you, usually the same day.
