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We talk a lot about why timber is an excellent building material – but what about when things go wrong? While not at all common, timber failure on commercial projects can happen. From warped boards to constructions which fall apart far too quickly, it is important to understand why these failures happen in order to prevent them on your commercial site.

In this guide, we will dive into exactly why timber can fall apart (and spoiler alert: it is entirely avoidable!).

Choosing the Wrong Timber Species

Mistakes can occur before you have even started building. If you order an unsuitable timber species for your project, you are setting yourself up for failure, and your timber has very little chance of remaining structurally sound.

To prevent this problem, spend a little time exploring how to choose the right timber species. Our experts recommend looking at:

  • Durability class: This refers to your timber’s natural resistance to rot and insect attack, which strongly influences its expected service life.
  • Use class: Use class categorises timber by its exposure conditions. For example, Use Class 1 is suitable for indoor joinery, while Use Class 4 is required for timber in ground or freshwater contact, such as piles and marine structures.

You can also talk to our team, letting us know what you are building and its intended location, and we will recommend some great timber species which will stand up to your requirements.

Incorrect Installation of Timber Products

Once you have sorted the right timber species for your project, you then need to make sure you install it correctly. Timber is a natural material which constantly responds to its environment, absorbing and releasing moisture as conditions change. If it has not been installed with this movement in mind, the timber can come under internal stress.

For example, decking boards which are fixed too tightly with no allowance for expansion can begin to push up against each other and buckle as the timber naturally swells. On the other hand, if decking boards are spaced too far apart, it can lead to instability as the gaps become too wide. Follow directions on correct installation and use spacers where needed to ensure consistently correct gaps.

It is also vital that you use the correct fixings when installing your timber. The wrong type or size of screws, for instance, can weaken your timber, causing cracks around the fastener points or boards which pull away from their substructure. We recommend using appropriate corrosion-resistant fixings, such as hot-dip galvanised or stainless steel, depending on the timber species and exposure conditions.

Not Maintaining Your Timber

If you are not caring for your timber after installation, it could be a contributing factor to its failure.

There are some timber species, such as Ekki and Greenheart, which do not require much maintenance. These are durability class 1 timbers, and you can expect at least 25 years of service life when correctly specified, detailed and installed in suitable exposure conditions.

However, other species do need a little TLC to keep rot at bay, ensuring your structure stands the test of time. If you are using Pine outdoors, for instance, you will need to apply a preservative or sealant (such as an oil or stain) every 12-18 months. This boosts the durability of your timber against weather and insects, maintaining the structural integrity of your commercial timber project for years to come.

Find the Right Timber for Commercial Construction at EcoChoice

A sturdy, long-lasting commercial project always starts with a reliable timber species. Whether you are landscaping a pub garden or building a marine dock, specifying your timber is a task you simply cannot ignore. The good news? We are here to help.

Get in touch to find the right timber species for your commercial construction.

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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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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

Experts in Timber, Nationwide delivery

Joe Middleton

  • 6 years ago

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

Emma Hurrell

  • 6 years ago

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

Prem Raja

  • 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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