Which types of wood are best for timber decking

When it comes to decking for a garden, a larger landscaping project or even a pier, there are a lot of options out there. Depending on both your budget and what you want the decking to look like, there are many options for you to choose from. Here we discuss the different types of wood that are best for decking to help you choose the correct wood for your next project.

Hardwood vs Softwood

The first decision that you should make is whether you want to use a softwood or a hardwood. The main advantage of a hardwood is its longevity. Although chemically impregnated softwood decking has a life expectancy of approximately 15 years, some hardwoods such as Balau can last up to 50 years. Because they can last so much longer, hardwood timber is generally considered by a lot of people to be higher quality, however this naturally comes at a higher cost. Hardwood decking also needs minimal maintenance, which is another consideration. Overall, softwood is the most common option for decking due to it still being relatively durable but at a lower price.

Hardwood is a type of wood which comes from trees which are slow growing and broad leaved. Oak is a common example of a hardwood. Softwood derives from species of trees which are faster growing and are often conifers and evergreens such as pine and spruce. In general, hardwood decking will outperform softwood decks when it comes to overall “toughness” as they are extremely durable. However, softwood decking, once treated, is a much more economical choice initially, but will require more maintenance over the lifecycle of the product.

Thermo modified wood

Thermowood is available in a variety of timbers including both softwoods (e.g. Thermodified Pine) and hardwoods (e.g. Thermodified Ash). Thermowood® is a registered process, created by heating the timber in a low oxygen environment using a carefully balanced mix of heat, pressure and vapour. This ends up changing the chemical structure of the wood and in turn making it more durable and increasing the stability of the material. This process is particularly effective for softwoods such as Pine. We supply Thermowood® as well as other similar processes of thermo modification with comparable performance – let us know what you’re after and we’ll help you.

A great benefit to this process is that it doesn’t involve any chemicals. Thermally modified wood is becoming an increasingly popular choice in the UK for cladding as well as decking projects. Once the treatment has been carried out, the wood will look slightly darker but still natural. It is also safe to burn and is 100% recyclable once it has reached the end of its lifecycle.

OrganoWood

OrganoWood has revolutionised timber technology and has become award winning as it uses silica (a natural material) to increase the durability and stability of decking as well as improving its fire resistance.

The process is inspired by fossilisation where natural substances (such as silicon) permeate the structure and turn them into a material similar to stone. This means that OrganoWood is in fact 10% fossil and 90% wood. The part of the wood that is fossilised is on the surface, meaning that it is protected from rot and is fire resistant. In addition to this, because it is replicating a natural process, this is an eco-friendly method, making it is a great option for those who are environmentally conscious, whilst still being cost effective.

Pressure treated / chemically treated

This is one of the most popular types of wood for decking as it is usually the most affordable option whilst still providing a sturdy and durable decking. This decking is usually made from softwoods such as pine that have been preserved with a chemical biocide treatment to give it protection from both insects and mould. The layer of preservative chemicals that is impregnated into the timber can sometimes be shallow and can lead to leaching of these chemicals. Ensure you are aware of the chemicals used. Although some are safe, some may not be as family friendly as other options such as OrganoWood or Thermodified Wood. If any sections (no matter how small) have been chopped, you will begin to see damage to these areas unless you protect and seal them.

Temperate Hardwood

Temperate hardwoods come from forests located between the tropics and the polar regions. They have moderate climates, four seasons, a clearly defined winter and are located in both the Northern and Southern hemispheres. Temperate forest locations include the United States, Canada, Europe and Japan. Oak and Chestnut are the main species used for decking. They will create beautiful long-lasting decking that requires minimal maintenance, is naturally weather resistance and has a desirable colour. It is also worth remembering that if you choose European species you will also be minimising the carbon footprint of your project.

Tropical Woods

Many deem tropical woods to be one of the best options for decking. Not only are they incredibly dense, making them extremely durable, but they also look stunning. That is probably why they are more expensive than other choices and they can be hard to source. If you are leaning towards using a tropical wood, then you need to ensure it comes from a responsible source and is produced in a sustainable way, as deforestation is a huge concern with these species of wood and irresponsible forestry can cause havoc on our ecosystem. An easy way to solve this is to check your tropical timber is FSC® certified.

Cost Benefit Analysis

Before you choose the timber you need for your decking project, you will need to undertake a cost benefit analysis. Consider your budget, the location of the project and what appearance you are looking for before choosing, bearing in mind that natural wood will always tend to weather to silver grey.  You also need to consider the maintenance needs of the option you choose as they vary significantly. If the appearance of the decking is your highest priority, with no or minimal knots, then hardwood may be the way to go, as long as you are prepared for the higher price tag. Alternatively, if lower cost and environmental footprint is your main concern then exploring Thermodified wood and OrganoWood are great options.

Cost should not be your only driving factor since installing the deck can be quite time and labour intensive so you probably don’t want to do this very often. Considering the effect on the environment should also be high on your priority list, especially for large public projects, as sustainability and going green is not a passing trend. Many governmental contracts will only be awarded to projects that demonstrate a strong sustainability aspect. This does not mean that sustainable timber needs to cost you more, however. There are many FSC and PEFC species that range in price to suit a variety of budgets.

Timber is a great material to use for decking projects due to the carbon sinking qualities, insulation properties and low energy production, making it a natural and amazing choice for those seeking a low carbon footprint. Composite boards (made with plastic, so high footprint) may maintain their colour and even be very durable, however nothing compares to the feeling of walking barefoot on real natural wood.

Who are EcoChoice?

EcoChoice are specialist suppliers of certified timber and recycled plastic products for exterior works: from cladding and decking to piers and footbridges. We were formed in 2005 with the aim of promoting FSC certified timbers to the UK construction industry, helping customers to engage in a sustainable way instead of turning away from both the deforestation and plastic waste problems. We offer products from a wide range of timber species.

We are passionate about supplying our clients with independently certified timber products while encouraging responsible and sustainable practices at the source level. To find out how we can help you get a quick, no obligation quote, please call us on 0345 638 1340, email us on info@ecochoice.co.uk or for more information about our sustainable timber products, please visit our website, https://ecochoice.co.uk.

Which timber for decking

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Our timber experts have years of experience and will be able to match the perfect species to your project, as well as provide a quote for sustainable timber at highly competitive prices.

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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Marinella Li

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.

5

Janet Sycamore

Having needed the supply of cladding, decking boards and other specified timbers through out the year Eco choice have been very helpful in sourcing the specified timbers and quantities required at a very competitive price.

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Tim Saunders

Great quality, service and price. A pleasure to deal with. I would highly recommend Eco Choice.

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Fantastic company- Mike and the team are the best in the business- worked with them for many years.

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  • 9 years ago

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  • 6 years ago

Great quality, service and price. A pleasure to deal with. I would highly recommend Eco Choice.

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Excellent service and outstanding product

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