Cumaru Decking - Get Online Prices

Buy Cumaru decking today, with a choice between six profiles you will get the decking to suit you.

Cumaru Decking

1) Click to choose a Cumaru Decking profiles

IWD7 - Pencil Rounded - 145mm x 21mm
IWD7 - Pencil Rounded - 145mm x 21mm

2) Choose your Grade of Cumaru Decking

Select Select and Better Cladding
Select and Better
A beautifully clean (very few knots) tropical decking in a rich, warm brown. Extremely naturally durable.

3) Enter your Size and Quantity

Gap (mm)
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Supplied in lengths of 2.1m and longer
Example Pricing for Cumaru Decking
Price From £26.96 per meter (Profile: IWD7 - Pencil Rounded - 145mm x 21mm - Grade: Select and Better - 1m)
Product Description

Cumaru is a heavily durable, tropical timber. The timber itself is a medium to dark brown with the occasional Reddish/purplish hue, there may also be some pieces with yellowish/greenish brown streaks. On touch, the timber has a waxy/oily feel to it.

As with the majority of tropical timbers, Cumaru decking, is exceptionally durable with a long lifespan. The wood is capable of withstanding all weathering and punishment without the need for treatment. It is also resistant to rot, mould and most insect infections (although some infestation is still a possibility).

We supply Cumaru decking in IWD7 which is smooth on all sides and rounded on the edges. This profile is fully reversable, so you get to see whichever side you prefer. The colour and pattern of the grain are two of the factors which may sway your decision. The section size of the boards is 21mm x 145mm and the corners are rounded to a 3mm radius.

Select and Better Grade Cumaru Timber

A common factor among tropical timbers in the small amount of knots in the wood and Cumaru is no different. The Select and Better grade we supply is kiln dried and highly stable, so there is very little moisture movement even without treatment.

Cumaru timber has an interlocked grain which makes it difficult to work with. So, buying it pre-machined ready to fit is a major advantage in order to save yourself precious time and effort.

Fixing and Treating

It is important to pre-drill any holes in the timber in order to avoid splitting. Also make sure that any screws or nails used are stainless steel, otherwise, the metal may react with the tannins in the timber causing blue staining.

When laying the deck you can leave a gap between each board (they don’t interlock like a T&G flooring). Usually the gap is 4mm-6mm, this ensures that items like chair legs don’t fall through.

You do not need to treat this timber in order to increase its lifespan and when laid correctly it could last in excess of 30 years. If you would like to preserve the colour and stop the sun from bleaching it you can treat the wood with a UV protector, however, you would need to retreat every so often.

Advantages of Cumaru Decking

  1. Immensely durable
  2. Looks amazing
  3. Stable
  4. Easy to maintain
  5. Resistance to rot

More About Cumaru

Also known as Brazilian Teak, Cumaru is distributed across South America in the north and central areas of the continent. The tree is heavily cultivated across Mexico and in the West Indies, not just for its timber, but also the Tonka Beans it produces. Tonka Beans are a vanilla substitute for producing cocoa, they are also used to flavour tobacco.

The tree can grow anywhere from 24m to 36m high with a truck diameter of 0.5m – 0.75m.

What do our Customers Say?
The quality of the timber is outstanding.
- David Berryman

Prices were clear to understand. My first order and went very well.
- Ernest Warren

Just a quick line to say thanks for the swift delivery of the ash I ordered a couple of weeks ago. It is now installed as stair treads/ landing and looks superb. Just one small gripe, the delivery driver didn't call me to say he was on his way which meant I had to rush over; he did help me carry it into the house though. I think the picture does them justice.
- Stephen Barker, Spalding

I'm very happy with the customer service here and will be definitely using iWood again in the future.
- James Marshall

We have used you before. Very happy with service and ease of ordering.
- Gerald Mummery

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Architect / Design Specify

Select and Better
Product Code: IW-18-62-26-19

Specify: Select and Better Cumaru External Cladding Cumaru Decking from iWood Timber

Some commonly asked questions


Our timber is imported straight from sawmills on the continent. Our usual lead times are therefore 14 to 17 working days.


We calculate our delivery costs based on how far away you are from us, to get more information on this please check out our shipping costs page.


Our delivery lorries visit different parts of the country on different days, so once your order is ready we will work with you to arrange a delivery day for when one of our lorries is in your area. We will always arrange the delivery day in advance with you.


We deliver weekdays Monday to Friday between the hours of 8am to 5pm. Our delivery vehicles will have multiple jobs on them which can affect the delivery time to you, depending on factors such as traffic and how long it takes to offload the previous jobs. The driver will call you in advance with an estimated time of arrival to make sure you'll be there.


You can place your order online by working out your price above and adding your items to your shopping basket. You can then check out and your order will be processed securely and a confirmation email sent. Once your order arrives in our depot, we'll give you a call to arrange delivery.


Yes you can, you can order samples of certain timbers at If the species you need isn't there please give us a call or talk to us on our online chat.

The timbers shown are planed all round samples and are not profiled.

Still Have Questions?

Call our seasoned sales team on 01889 597 281.

Send us a message through our Contact Form.

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