Thermowood, also known as thermally modified wood, is growing in popularity throughout the UK and the rest of the world. Here, we deliver the ultimate guide to Thermowood, so you can discover what all the fuss is about.
We take a closer look at the benefits of using FSC certified timber products and how they are already making a difference throughout the building, civil, landscaping, and marine industries.
Timber cladding is a natural, lightweight yet durable material which ensures a beautiful finish. In this blog post, we showcase the timber cladding profiles most commonly used so that you can find the right profile for your project.
It is vital that the timber you choose is suitable for the project’s location, weather and environment. In order to ensure the correct timber is selected, both durability and use class play an important part in the decision process. Here, we discuss in further detail what this means.
What do you do if a product does not have the FSC® logo on it? Is it still FSC® certified or is it from a non-certified or perhaps even illegal source? The product may in fact still be certified by the FSC, but there are a few steps you can take to ensure it is as outlined in this blog.
Trees are comprised of both sapwood and heartwood. You may have heard of these terms, but here we discuss in further detail what exactly they are, what the difference between the two are, how you can identify each type and how their varying properties affect how you work with the wood.
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.
Groynes are a popular form of sea defence in the UK and many of our beautiful beaches have wooden groynes built on them. They play a vital part in efforts to help protect our beaches from further coastal erosion and to help our beaches be as stable of possible. Although groynes can be made from several different materials, including stone and concrete, here we discuss why wood is a great option to choose.
FSC stands for the Forest Stewardship Council which is a non-governmental organisation dedicated to promoting responsible forest management worldwide. Here we explain why you should choose FSC certified products and explain why our forests need sustainable management.
Wood is broadly classified into one of two categories: hardwood or softwood. Each category has distinct qualities and characteristics and can help determine its identification as well as how the wood is used and where. Here, we go into more detail about what hardwoods and softwoods are, how they differ from each other and how they are used in our daily lives.
Building with wood has many great benefits. Timber has been used over hundreds of years to build quality, long lasting buildings and structures. But why is it so good? Here are just a few facts that show why wood is such an amazing and interesting material.
Landscaping adds structure, character and texture to your garden or outside space. Here, we look at some of the ways that you can use timber for landscaping your garden, and also explain the benefits of doing so.

Ask Joe! Expert industry advice
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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.
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Frequently asked questions
Do you supply timber for domestic uses?
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 Ekki, Greenheart, Opepe 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 (bridges, piling, etc) we usually supply Cumaru, Ipe, Jatoba, and Balau. And for the lighter exterior use where the timber is non-structural such as cladding, we deliver Cedar, Larch, Thermowood 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.
What our customers say about us
Good quality, great service, fast delivery!
5
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.
5
Tim Saunders
Great quality, service and price. A pleasure to deal with. I would highly recommend Eco Choice.
5
Emma Hurrell
Fantastic company- Mike and the team are the best in the business- worked with them for many years.
5
Prem Raja
Always reliable and quality products, easy to deal with company.
5
Stone Zone
4.9
Average rating on Google Reviews
9 years ago
Great service, quality products and very easy to deal with. Thank you.
Malcolm Coury
6 years ago
Fantastic company- Mike and the team are the best in the business- worked with them for many years.
Prem Raja
6 years ago
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.
Tim Saunders
3 years ago
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.
Janet Sycamore
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| Mondays: | 09:00 – 17:00 |
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| Tuesdays: | 09:00 – 17:00 |
| Wednesdays: | 09:00 – 17:00 |
| Thursdays: | 09:00 – 17:00 |
| Fridays: | 09:00 – 16:00 |
| Saturdays: | Closed |
| Sundays: | Closed |
