5 things you didn’t know about Ekki

As leading providers of FSC® certified sustainable timbers, we deliver a number of wood varieties to help all industries boost the eco-friendliness of their projects. One of our most popular hardwood species, alongside Oak, is Ekki.

Ekki is a naturally durable timber that’s amongst the hardest species on the planet. Subsequently it is the ideal material for use across a multitude of applications looking for a very long service life durability. Yet, still many aren’t aware of the additional benefits that go hand-in-hand with Ekki.

Read on to discover five things you didn’t know about Ekki and find the right sustainable timber for your upcoming project.

1. Ekki originates from West Africa

Ekki comes from different countries in West Africa, including Gabon, Cameroon and Ghana. Those who don’t know the species as Ekki may be more familiar with its other local names such as Azobe or Bongossi. It is sometimes also known as Red Ironwood, a title which refers to its extreme strength and durability, as well as its distinctive red colouring.

2. It’s one very special timber type

In its rainforest home in West Africa, Ekki is a special type of timber that generally sits amongst thousands of other tree species. Here TRADA details how to identify Ekki by its colour and appearance:

“The sapwood is pale pink and sharply defined from the heart-wood, which is red-brown to dark brown with a somewhat speckled appearance due to white deposits in the pores. The grain is usually interlocked and the texture is coarse. The wood is extremely hard and heavy, weighing 960 to 1120 kg/m³ when dried.”

3. Ekki is an important species for sustainability

Ekki is a vulnerable tree species. It has been exploited heavily in recent years due to its impressive density, durability, and lack of availability throughout the western world. It is at the centre of West Africa’s history of deforestation as a result, with illegal logging, corrupt practices, the hunting of endangered wildlife, human rights abuses, and habitat destruction all contributing to the demise of this incredible tree species.

Sourcing your Ekki timber from an FSC® certified forest via an independent supplier like us is therefore important. By obtaining Ekki from FSC® certified sources, you are helping to uphold the FSC® standard of sustainable logging in tropical forests, which ensures both the forest and its people and biodiversity are respected and not depleted.

4. It’s so dense it sinks in water

Its density is just one of the physical properties that makes Ekki the first choice for civil and marine projects. Ekki’s relative weight is 1.2 which means it sinks in water.

The natural strength and elasticity of Ekki exceeds Oak by far too. Ekki has a Crushing Strength of 96 MPa compared to European Oak’s 46.3 MPa. Its Static Bending Strength or Modulus of Rupture (MoR) is 162 MPa, while Oak has an MoR of 97.1 MPa. The Modulus of Elasticity (or MoE) of Ekki stands at an impressive 21,420 MPa.

Just to put it into perspective, Ekki is about double the strength of Pine. Scots Pine or Pinus Sylvestris has a MoR of 83.3 MPa and a Crushing Strength of just 41.5 MPa according to The Wood Database.

5. Ekki is perfect for marine projects

The amazing durability and strength of Ekki makes it the best material for many civil, rail and marine applications. Unlike steel and concrete, Ekki lasts a long time in water.

Rather than rusting, corroding, and collapsing, Ekki’s density and natural tannins protect it from being attacked by degrading organisms. It is commonly used to construct piers, beach groynes, railway longitudinal beams, and sleepers as a result.

Find out more about Ekki timber or contact us directly to discuss your project requirements.

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Frequently asked questions

Do you supply timber for domestic uses?

Yes, we supply timber for domestic applications as well as commercial and public constructions. From garden decking to shed cladding, we will be happy to supply smaller deliveries for home use.

Is your timber FSC-certified?

Yes, all timber we supply is FSC or PEFC certified and sourced from independently verified responsibly managed forests. If we can’t find your request in FSC/PEFC certified timber we’ll suggest an alternative that is certified or clearly note that the offer is minimum EUTR.

Where does EcoChoice deliver to?

EcoChoice delivers to construction sites, warehouses and homes across the UK, as long as there’s access and unloading for our trucks.

What are the best timber species for exterior use?

There are many different timber species suitable for exterior use and which is the best for your project depends on your requirements. In general, though, we recommend EkkiGreenheartOpepe and Oak for heavier civil/marine uses. For intermediary external use such as decking, where the timber needs to be both strong and durable but not on the same level as civil engineering (bridgespiling, etc) we usually supply CumaruIpe, Jatoba, and Balau. And for the lighter exterior use where the timber is non-structural such as cladding, we deliver CedarLarchThermowood and others.

Which timber is the most durable?

Durability Class 1 timbers are the most durable. This of course depends on the use (hazard) class they’ll be in service for. For direct ground and water contact such as sleepers, fenders, marine piling, etc, Ekki and Greenheart are known to be the most durable timbers available. For decking and cladding where there’s no direct ground contact (use class 3) there’s a much wider range of timbers such Larch, Cedar, Thermo modified Pine or Ash and others.

What’s the best timber for internal cladding?

Internal cladding, where your timber is not in ground and not exposed to the elements can be classed as either use-class 1 or 2 – in which case most timbers will meet this durability criteria. That is not to say they’ll be the best, since internal environments have lower humidity (moisture) levels than outside. So in these cases, it’s best to go for a kiln-dried timber cladding board as these are more stable and delivered already in lower MC (moisture content) than the usual fresh sawn timbers sent to external applications. A word of caution – as timber reacts to variations in moisture, it’s best to avoid cladding any areas inside your bathroom.

How can I make decking less slippery?

The first thing is to ensure your deck boards are kept clean from leaves and other debris which will, over time, cover the surface and make it more slippery. Grooved boards can be used to improve grip if installed and used perpendicular to traffic, so especially useful in narrow passages and footbridges. Lastly, you can add our Grip-Choice strips: these are a mix of epoxy with aggregates that add gripping ridges to your deck area. Gripchoice is an easy way to make decking less slippery and safer, especially over large areas or where there’s high traffic. We can pre-install Grip-Choice strips for your decking before delivery or ship the strips separately to add to your existing deck’s grooves as a retro-fit solution.

What wood machining services do you offer?

We can offer planing, sawing, drilling and profiling of rough-sawn wood to any profile you require: from handrails to large port fenders.

Can you supply pre-drilled timber?

Yes, we will be happy to provide pre-drilled timber which is tailored to your needs for quick installation, thus saving you valuable time on site.

What cladding profiles do you supply?

We provide a wide range of cladding profiles, including tongue and groove, featheredge and shiplap. You can check the standard profiles here – but we can also match or custom make profiles to suit your specific needs.

Does timber change colour?

Yes, timber is well-known for changing colour over time. Some species can darken quickly right after installation, and like most untreated wood will eventually weather to a beautiful silver-grey. Interior timber is less likely to change colour (depending on conditions), and timber can be stained, painted or treated with UV-resistant oils to reduce colour change.

Do I need to treat exterior timber?

Some timbers such as Oak and Ekki, can withstand the strains of exterior use without any treatment. However, to extend the lifespan and maintain the aesthetic of your wood, we do recommend treating your timber with stains and oils. Pre-treated timber, such as ThermoWood and OrganoWood, are low-maintenance options which are more durable, but can have their life service extended by applying a clean and stain maintenance schedule.

Do I need to treat interior timber?

Depends on what area the timber is being used. For floor joists and timber rafters, it is common to see timber treated, or least very well kiln-dried. Other uses such as flooring may benefit from varnishing while internal timber cladding for decorative purposes shouldn’t require any treatment other than if you want to change its colour with different types of stains or oils.

Where are you based?

We’re based in Cambridge, UK, and coordinate multiple sawmills all over the world to manufacture your order. We then organise delivery with a range of hauliers so that your orders gets to your site on time.

What are the usual decking sizes?

Timber decking is usually 21x140mm or similar. For heavier applications where there’s more load and traffic, we deliver 35 or 45mm thick boards (such as Hastings Pier). Narrower boards are also possible: 95-90mm is a standard width – but we can manufacture whatever size you require.

What are the usual cladding sizes?

Typical cladding section sizes are 18×95 and 18x145mm although we can always custom make a section to suit your project’s design requirements. That includes waney edge boards in Oak or Chestnut as well as extra wide 195mm boards.

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Always helpful! One of our valued TDCA DeckMark and CladMark accredited supplier members which means their quality procedures are routinely audited and stand up to scrutiny giving you extra peace of mind.

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